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<article class="content wrap" id="_content" data-uid="FreeSql.ISelectFromExpression`1">
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<h1 id="FreeSql_ISelectFromExpression_1" data-uid="FreeSql.ISelectFromExpression`1" class="text-break">Interface ISelectFromExpression<T1>
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</h1>
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<div class="markdown level0 summary"></div>
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<div class="markdown level0 conceptual"></div>
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<h6><strong>Namespace</strong>: <a class="xref" href="FreeSql.html">FreeSql</a></h6>
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<h6><strong>Assembly</strong>: FreeSql.dll</h6>
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<h5 id="FreeSql_ISelectFromExpression_1_syntax">Syntax</h5>
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<div class="codewrapper">
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<pre><code class="lang-csharp hljs">public interface ISelectFromExpression<T1></code></pre>
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</div>
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<h5 class="typeParameters">Type Parameters</h5>
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<table class="table table-bordered table-striped table-condensed">
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<thead>
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<tr>
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<th>Name</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td><span class="parametername">T1</span></td>
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<td></td>
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</tr>
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</tbody>
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</table>
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<h3 id="methods">Methods
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</h3>
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<span class="small pull-right mobile-hide">
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<span class="divider">|</span>
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<a href="https://github.com/dotnetcore/freesql/new/master/apiSpec/new?filename=FreeSql_ISelectFromExpression_1_InnerJoin_System_Linq_Expressions_Expression_System_Func__0_System_Boolean___.md&value=---%0Auid%3A%20FreeSql.ISelectFromExpression%601.InnerJoin(System.Linq.Expressions.Expression%7BSystem.Func%7B%600%2CSystem.Boolean%7D%7D)%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
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</span>
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<span class="small pull-right mobile-hide">
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<a href="https://github.com/dotnetcore/FreeSql/blob/master/FreeSql/Interface/Curd/ISelect/ISelectFrom.cs/#L11">View Source</a>
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</span>
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<a id="FreeSql_ISelectFromExpression_1_InnerJoin_" data-uid="FreeSql.ISelectFromExpression`1.InnerJoin*"></a>
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<h4 id="FreeSql_ISelectFromExpression_1_InnerJoin_System_Linq_Expressions_Expression_System_Func__0_System_Boolean___" data-uid="FreeSql.ISelectFromExpression`1.InnerJoin(System.Linq.Expressions.Expression{System.Func{`0,System.Boolean}})">InnerJoin(Expression<Func<T1, Boolean>>)</h4>
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<div class="markdown level1 summary"></div>
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<div class="markdown level1 conceptual"></div>
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<h5 class="decalaration">Declaration</h5>
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<div class="codewrapper">
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<pre><code class="lang-csharp hljs">ISelectFromExpression<T1> InnerJoin(Expression<Func<T1, bool>> exp)</code></pre>
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</div>
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<h5 class="parameters">Parameters</h5>
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<table class="table table-bordered table-striped table-condensed">
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<thead>
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<tr>
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<th>Type</th>
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<th>Name</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td><span class="xref">System.Linq.Expressions.Expression</span><<span class="xref">System.Func</span><T1, <span class="xref">System.Boolean</span>>></td>
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<td><span class="parametername">exp</span></td>
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<td></td>
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</tr>
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</tbody>
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</table>
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<h5 class="returns">Returns</h5>
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<table class="table table-bordered table-striped table-condensed">
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<thead>
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<tr>
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<th>Type</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td><a class="xref" href="FreeSql.ISelectFromExpression-1.html">ISelectFromExpression</a><T1></td>
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<td></td>
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</tr>
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</tbody>
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</table>
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<span class="small pull-right mobile-hide">
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<span class="divider">|</span>
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<a href="https://github.com/dotnetcore/freesql/new/master/apiSpec/new?filename=FreeSql_ISelectFromExpression_1_LeftJoin_System_Linq_Expressions_Expression_System_Func__0_System_Boolean___.md&value=---%0Auid%3A%20FreeSql.ISelectFromExpression%601.LeftJoin(System.Linq.Expressions.Expression%7BSystem.Func%7B%600%2CSystem.Boolean%7D%7D)%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
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||
</span>
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||
<span class="small pull-right mobile-hide">
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<a href="https://github.com/dotnetcore/FreeSql/blob/master/FreeSql/Interface/Curd/ISelect/ISelectFrom.cs/#L10">View Source</a>
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</span>
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<a id="FreeSql_ISelectFromExpression_1_LeftJoin_" data-uid="FreeSql.ISelectFromExpression`1.LeftJoin*"></a>
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<h4 id="FreeSql_ISelectFromExpression_1_LeftJoin_System_Linq_Expressions_Expression_System_Func__0_System_Boolean___" data-uid="FreeSql.ISelectFromExpression`1.LeftJoin(System.Linq.Expressions.Expression{System.Func{`0,System.Boolean}})">LeftJoin(Expression<Func<T1, Boolean>>)</h4>
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<div class="markdown level1 summary"></div>
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<div class="markdown level1 conceptual"></div>
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<h5 class="decalaration">Declaration</h5>
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<div class="codewrapper">
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<pre><code class="lang-csharp hljs">ISelectFromExpression<T1> LeftJoin(Expression<Func<T1, bool>> exp)</code></pre>
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</div>
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<h5 class="parameters">Parameters</h5>
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<table class="table table-bordered table-striped table-condensed">
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<thead>
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<tr>
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<th>Type</th>
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<th>Name</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td><span class="xref">System.Linq.Expressions.Expression</span><<span class="xref">System.Func</span><T1, <span class="xref">System.Boolean</span>>></td>
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<td><span class="parametername">exp</span></td>
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<td></td>
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</tr>
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</tbody>
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</table>
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<h5 class="returns">Returns</h5>
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<table class="table table-bordered table-striped table-condensed">
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<thead>
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<tr>
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<th>Type</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td><a class="xref" href="FreeSql.ISelectFromExpression-1.html">ISelectFromExpression</a><T1></td>
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<td></td>
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</tr>
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</tbody>
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</table>
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<span class="small pull-right mobile-hide">
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<span class="divider">|</span>
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<a href="https://github.com/dotnetcore/freesql/new/master/apiSpec/new?filename=FreeSql_ISelectFromExpression_1_OrderBy__1_System_Linq_Expressions_Expression_System_Func__0___0___.md&value=---%0Auid%3A%20FreeSql.ISelectFromExpression%601.OrderBy%60%601(System.Linq.Expressions.Expression%7BSystem.Func%7B%600%2C%60%600%7D%7D)%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
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||
</span>
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||
<span class="small pull-right mobile-hide">
|
||
<a href="https://github.com/dotnetcore/FreeSql/blob/master/FreeSql/Interface/Curd/ISelect/ISelectFrom.cs/#L34">View Source</a>
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||
</span>
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||
<a id="FreeSql_ISelectFromExpression_1_OrderBy_" data-uid="FreeSql.ISelectFromExpression`1.OrderBy*"></a>
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||
<h4 id="FreeSql_ISelectFromExpression_1_OrderBy__1_System_Linq_Expressions_Expression_System_Func__0___0___" data-uid="FreeSql.ISelectFromExpression`1.OrderBy``1(System.Linq.Expressions.Expression{System.Func{`0,``0}})">OrderBy<TMember>(Expression<Func<T1, TMember>>)</h4>
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<div class="markdown level1 summary"><p>按列排序,OrderBy(a => a.Time)</p>
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||
</div>
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||
<div class="markdown level1 conceptual"></div>
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||
<h5 class="decalaration">Declaration</h5>
|
||
<div class="codewrapper">
|
||
<pre><code class="lang-csharp hljs">ISelectFromExpression<T1> OrderBy<TMember>(Expression<Func<T1, TMember>> column)</code></pre>
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||
</div>
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||
<h5 class="parameters">Parameters</h5>
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||
<table class="table table-bordered table-striped table-condensed">
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<thead>
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<tr>
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<th>Type</th>
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<th>Name</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td><span class="xref">System.Linq.Expressions.Expression</span><<span class="xref">System.Func</span><T1, TMember>></td>
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<td><span class="parametername">column</span></td>
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<td></td>
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</tr>
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</tbody>
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</table>
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<h5 class="returns">Returns</h5>
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<table class="table table-bordered table-striped table-condensed">
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<thead>
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<tr>
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<th>Type</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td><a class="xref" href="FreeSql.ISelectFromExpression-1.html">ISelectFromExpression</a><T1></td>
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<td></td>
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</tr>
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</tbody>
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||
</table>
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<h5 class="typeParameters">Type Parameters</h5>
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<table class="table table-bordered table-striped table-condensed">
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<thead>
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<tr>
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<th>Name</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td><span class="parametername">TMember</span></td>
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<td></td>
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</tr>
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</tbody>
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</table>
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<span class="small pull-right mobile-hide">
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||
<span class="divider">|</span>
|
||
<a href="https://github.com/dotnetcore/freesql/new/master/apiSpec/new?filename=FreeSql_ISelectFromExpression_1_OrderByDescending__1_System_Linq_Expressions_Expression_System_Func__0___0___.md&value=---%0Auid%3A%20FreeSql.ISelectFromExpression%601.OrderByDescending%60%601(System.Linq.Expressions.Expression%7BSystem.Func%7B%600%2C%60%600%7D%7D)%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
|
||
</span>
|
||
<span class="small pull-right mobile-hide">
|
||
<a href="https://github.com/dotnetcore/FreeSql/blob/master/FreeSql/Interface/Curd/ISelect/ISelectFrom.cs/#L40">View Source</a>
|
||
</span>
|
||
<a id="FreeSql_ISelectFromExpression_1_OrderByDescending_" data-uid="FreeSql.ISelectFromExpression`1.OrderByDescending*"></a>
|
||
<h4 id="FreeSql_ISelectFromExpression_1_OrderByDescending__1_System_Linq_Expressions_Expression_System_Func__0___0___" data-uid="FreeSql.ISelectFromExpression`1.OrderByDescending``1(System.Linq.Expressions.Expression{System.Func{`0,``0}})">OrderByDescending<TMember>(Expression<Func<T1, TMember>>)</h4>
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<div class="markdown level1 summary"><p>按列倒向排序,OrderByDescending(a => a.Time)</p>
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</div>
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<div class="markdown level1 conceptual"></div>
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<h5 class="decalaration">Declaration</h5>
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<div class="codewrapper">
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||
<pre><code class="lang-csharp hljs">ISelectFromExpression<T1> OrderByDescending<TMember>(Expression<Func<T1, TMember>> column)</code></pre>
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</div>
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<h5 class="parameters">Parameters</h5>
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<table class="table table-bordered table-striped table-condensed">
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<thead>
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<tr>
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<th>Type</th>
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<th>Name</th>
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<th>Description</th>
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</tr>
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</thead>
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||
<tbody>
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||
<tr>
|
||
<td><span class="xref">System.Linq.Expressions.Expression</span><<span class="xref">System.Func</span><T1, TMember>></td>
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<td><span class="parametername">column</span></td>
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<td><p>列</p>
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</td>
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</tr>
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</tbody>
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</table>
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<h5 class="returns">Returns</h5>
|
||
<table class="table table-bordered table-striped table-condensed">
|
||
<thead>
|
||
<tr>
|
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<th>Type</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td><a class="xref" href="FreeSql.ISelectFromExpression-1.html">ISelectFromExpression</a><T1></td>
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<td></td>
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</tr>
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||
</tbody>
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||
</table>
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||
<h5 class="typeParameters">Type Parameters</h5>
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<table class="table table-bordered table-striped table-condensed">
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||
<thead>
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||
<tr>
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<th>Name</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td><span class="parametername">TMember</span></td>
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||
<td></td>
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||
</tr>
|
||
</tbody>
|
||
</table>
|
||
<span class="small pull-right mobile-hide">
|
||
<span class="divider">|</span>
|
||
<a href="https://github.com/dotnetcore/freesql/new/master/apiSpec/new?filename=FreeSql_ISelectFromExpression_1_RightJoin_System_Linq_Expressions_Expression_System_Func__0_System_Boolean___.md&value=---%0Auid%3A%20FreeSql.ISelectFromExpression%601.RightJoin(System.Linq.Expressions.Expression%7BSystem.Func%7B%600%2CSystem.Boolean%7D%7D)%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
|
||
</span>
|
||
<span class="small pull-right mobile-hide">
|
||
<a href="https://github.com/dotnetcore/FreeSql/blob/master/FreeSql/Interface/Curd/ISelect/ISelectFrom.cs/#L12">View Source</a>
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||
</span>
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||
<a id="FreeSql_ISelectFromExpression_1_RightJoin_" data-uid="FreeSql.ISelectFromExpression`1.RightJoin*"></a>
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||
<h4 id="FreeSql_ISelectFromExpression_1_RightJoin_System_Linq_Expressions_Expression_System_Func__0_System_Boolean___" data-uid="FreeSql.ISelectFromExpression`1.RightJoin(System.Linq.Expressions.Expression{System.Func{`0,System.Boolean}})">RightJoin(Expression<Func<T1, Boolean>>)</h4>
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<div class="markdown level1 summary"></div>
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||
<div class="markdown level1 conceptual"></div>
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<h5 class="decalaration">Declaration</h5>
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||
<div class="codewrapper">
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||
<pre><code class="lang-csharp hljs">ISelectFromExpression<T1> RightJoin(Expression<Func<T1, bool>> exp)</code></pre>
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</div>
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<h5 class="parameters">Parameters</h5>
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<table class="table table-bordered table-striped table-condensed">
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<thead>
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<tr>
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<th>Type</th>
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<th>Name</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td><span class="xref">System.Linq.Expressions.Expression</span><<span class="xref">System.Func</span><T1, <span class="xref">System.Boolean</span>>></td>
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<td><span class="parametername">exp</span></td>
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<td></td>
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</tr>
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</tbody>
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</table>
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<h5 class="returns">Returns</h5>
|
||
<table class="table table-bordered table-striped table-condensed">
|
||
<thead>
|
||
<tr>
|
||
<th>Type</th>
|
||
<th>Description</th>
|
||
</tr>
|
||
</thead>
|
||
<tbody>
|
||
<tr>
|
||
<td><a class="xref" href="FreeSql.ISelectFromExpression-1.html">ISelectFromExpression</a><T1></td>
|
||
<td></td>
|
||
</tr>
|
||
</tbody>
|
||
</table>
|
||
<span class="small pull-right mobile-hide">
|
||
<span class="divider">|</span>
|
||
<a href="https://github.com/dotnetcore/freesql/new/master/apiSpec/new?filename=FreeSql_ISelectFromExpression_1_Where_System_Linq_Expressions_Expression_System_Func__0_System_Boolean___.md&value=---%0Auid%3A%20FreeSql.ISelectFromExpression%601.Where(System.Linq.Expressions.Expression%7BSystem.Func%7B%600%2CSystem.Boolean%7D%7D)%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
|
||
</span>
|
||
<span class="small pull-right mobile-hide">
|
||
<a href="https://github.com/dotnetcore/FreeSql/blob/master/FreeSql/Interface/Curd/ISelect/ISelectFrom.cs/#L19">View Source</a>
|
||
</span>
|
||
<a id="FreeSql_ISelectFromExpression_1_Where_" data-uid="FreeSql.ISelectFromExpression`1.Where*"></a>
|
||
<h4 id="FreeSql_ISelectFromExpression_1_Where_System_Linq_Expressions_Expression_System_Func__0_System_Boolean___" data-uid="FreeSql.ISelectFromExpression`1.Where(System.Linq.Expressions.Expression{System.Func{`0,System.Boolean}})">Where(Expression<Func<T1, Boolean>>)</h4>
|
||
<div class="markdown level1 summary"><p>查询条件,Where(a => a.Id > 10),支持导航对象查询,Where(a => a.Author.Email == "2881099@qq.com&quot;)</p>
|
||
</div>
|
||
<div class="markdown level1 conceptual"></div>
|
||
<h5 class="decalaration">Declaration</h5>
|
||
<div class="codewrapper">
|
||
<pre><code class="lang-csharp hljs">ISelectFromExpression<T1> Where(Expression<Func<T1, bool>> exp)</code></pre>
|
||
</div>
|
||
<h5 class="parameters">Parameters</h5>
|
||
<table class="table table-bordered table-striped table-condensed">
|
||
<thead>
|
||
<tr>
|
||
<th>Type</th>
|
||
<th>Name</th>
|
||
<th>Description</th>
|
||
</tr>
|
||
</thead>
|
||
<tbody>
|
||
<tr>
|
||
<td><span class="xref">System.Linq.Expressions.Expression</span><<span class="xref">System.Func</span><T1, <span class="xref">System.Boolean</span>>></td>
|
||
<td><span class="parametername">exp</span></td>
|
||
<td><p>lambda表达式</p>
|
||
</td>
|
||
</tr>
|
||
</tbody>
|
||
</table>
|
||
<h5 class="returns">Returns</h5>
|
||
<table class="table table-bordered table-striped table-condensed">
|
||
<thead>
|
||
<tr>
|
||
<th>Type</th>
|
||
<th>Description</th>
|
||
</tr>
|
||
</thead>
|
||
<tbody>
|
||
<tr>
|
||
<td><a class="xref" href="FreeSql.ISelectFromExpression-1.html">ISelectFromExpression</a><T1></td>
|
||
<td></td>
|
||
</tr>
|
||
</tbody>
|
||
</table>
|
||
<span class="small pull-right mobile-hide">
|
||
<span class="divider">|</span>
|
||
<a href="https://github.com/dotnetcore/freesql/new/master/apiSpec/new?filename=FreeSql_ISelectFromExpression_1_WhereIf_System_Boolean_System_Linq_Expressions_Expression_System_Func__0_System_Boolean___.md&value=---%0Auid%3A%20FreeSql.ISelectFromExpression%601.WhereIf(System.Boolean%2CSystem.Linq.Expressions.Expression%7BSystem.Func%7B%600%2CSystem.Boolean%7D%7D)%0Asummary%3A%20'*You%20can%20override%20summary%20for%20the%20API%20here%20using%20*MARKDOWN*%20syntax'%0A---%0A%0A*Please%20type%20below%20more%20information%20about%20this%20API%3A*%0A%0A">Improve this Doc</a>
|
||
</span>
|
||
<span class="small pull-right mobile-hide">
|
||
<a href="https://github.com/dotnetcore/FreeSql/blob/master/FreeSql/Interface/Curd/ISelect/ISelectFrom.cs/#L26">View Source</a>
|
||
</span>
|
||
<a id="FreeSql_ISelectFromExpression_1_WhereIf_" data-uid="FreeSql.ISelectFromExpression`1.WhereIf*"></a>
|
||
<h4 id="FreeSql_ISelectFromExpression_1_WhereIf_System_Boolean_System_Linq_Expressions_Expression_System_Func__0_System_Boolean___" data-uid="FreeSql.ISelectFromExpression`1.WhereIf(System.Boolean,System.Linq.Expressions.Expression{System.Func{`0,System.Boolean}})">WhereIf(Boolean, Expression<Func<T1, Boolean>>)</h4>
|
||
<div class="markdown level1 summary"><p>查询条件,Where(true, a => a.Id > 10),支导航对象查询,Where(true, a => a.Author.Email == "2881099@qq.com&quot;)</p>
|
||
</div>
|
||
<div class="markdown level1 conceptual"></div>
|
||
<h5 class="decalaration">Declaration</h5>
|
||
<div class="codewrapper">
|
||
<pre><code class="lang-csharp hljs">ISelectFromExpression<T1> WhereIf(bool condition, Expression<Func<T1, bool>> exp)</code></pre>
|
||
</div>
|
||
<h5 class="parameters">Parameters</h5>
|
||
<table class="table table-bordered table-striped table-condensed">
|
||
<thead>
|
||
<tr>
|
||
<th>Type</th>
|
||
<th>Name</th>
|
||
<th>Description</th>
|
||
</tr>
|
||
</thead>
|
||
<tbody>
|
||
<tr>
|
||
<td><span class="xref">System.Boolean</span></td>
|
||
<td><span class="parametername">condition</span></td>
|
||
<td><p>true 时生效</p>
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td><span class="xref">System.Linq.Expressions.Expression</span><<span class="xref">System.Func</span><T1, <span class="xref">System.Boolean</span>>></td>
|
||
<td><span class="parametername">exp</span></td>
|
||
<td><p>lambda表达式</p>
|
||
</td>
|
||
</tr>
|
||
</tbody>
|
||
</table>
|
||
<h5 class="returns">Returns</h5>
|
||
<table class="table table-bordered table-striped table-condensed">
|
||
<thead>
|
||
<tr>
|
||
<th>Type</th>
|
||
<th>Description</th>
|
||
</tr>
|
||
</thead>
|
||
<tbody>
|
||
<tr>
|
||
<td><a class="xref" href="FreeSql.ISelectFromExpression-1.html">ISelectFromExpression</a><T1></td>
|
||
<td></td>
|
||
</tr>
|
||
</tbody>
|
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</table>
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</article>
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