diff --git a/With-Sql.md b/With-Sql.md index a13b21b..fd6fdba 100644 --- a/With-Sql.md +++ b/With-Sql.md @@ -36,21 +36,21 @@ Different query results: ```csharp DataTable dt1 = _fsql.Select() - .WithSql("select * from TestClass ") - .ToDataTable("ID,Age"); + .WithSql("select * from TestClass ") + .ToDataTable("ID,Age"); ``` ```sql SELECT ID,Age - FROM(select * from TestClass ) a + FROM(select * from TestClass ) a ``` ### Return to DataTable with all columns ```csharp DataTable dt2 = _fsql.Select() - .WithSql("select * from TestClass ") - .ToDataTable("*"); + .WithSql("select * from TestClass ") + .ToDataTable("*"); ``` ```sql SELECT * @@ -62,25 +62,25 @@ FROM ( select * from TestClass ) a ```csharp List<(string,string)> list1 = _fsql .Select() - .WithSql("select * from TestClass ") - .ToList<(string, string)>("ID,Age"); + .WithSql("select * from TestClass ") + .ToList<(string, string)>("ID,Age"); ``` ```sql SELECT ID, Age - FROM(select * from TestClass ) a + FROM(select * from TestClass ) a ``` ### Return List\ ```csharp var list2 = _fsql.Select() - .WithSql("select * from TestClass ") - .ToList("*"); + .WithSql("select * from TestClass ") + .ToList("*"); ``` ```sql SELECT * - FROM(select * from TestClass ) a + FROM(select * from TestClass ) a ``` ### Return List\ and support paging @@ -88,16 +88,16 @@ SELECT * ```csharp var list3 = _fsql.Select() .WithSql("select * from TestClass ") - .WhereIf(true, "1=1") - .Page(1, 10).OrderBy("ID DESC") - .ToList("ID,Age"); + .WhereIf(true, "1=1") + .Page(1, 10).OrderBy("ID DESC") + .ToList("ID,Age"); ``` ```sql SELECT ID, Age - FROM(select * from TestClass ) a - WHERE(1 = 1) - ORDER BY ID DESC - limit 0,10 + FROM(select * from TestClass ) a + WHERE(1 = 1) + ORDER BY ID DESC + limit 0,10 ``` ### Return List\ and support paging @@ -105,18 +105,18 @@ SELECT ID, Age ```csharp var list4 = _fsql.Select() .WithSql("select * from TestClass ") - .WhereIf(true, "1=1") - .Page(1, 10) - .OrderBy("ID DESC") - .ToList("ID,Age,BIRTH_DAY as Birthday"); + .WhereIf(true, "1=1") + .Page(1, 10) + .OrderBy("ID DESC") + .ToList("ID,Age,BIRTH_DAY as Birthday"); ``` ```sql SELECT ID, Age,BIRTH_DAY as Birthday - FROM(select * from TestClass ) a - WHERE(1 = 1) - ORDER BY ID DESC - limit 0,10 + FROM(select * from TestClass ) a + WHERE(1 = 1) + ORDER BY ID DESC + limit 0,10 ``` @@ -183,14 +183,11 @@ fsql.Ado.CommandFluent($"{sql1} UNION ALL {sql2}") .ExecuteDataTable(); ``` - - ## Paging Problem After using `UNION ALL`, there will be a problem if you paginate directly. Please see the specific example: - -### There is a problem with using WithSql + Page multiple times: There is a paging statement in each WithSql +There is a problem with using WithSql + Page multiple times: There is a paging statement in each WithSql ```csharp var sql1 = fsql.Select() @@ -205,18 +202,18 @@ fsql.Select().WithSql(sql1).WithSql(sql2).Page(1, 20).ToList(); ```sql SELECT * from (SELECT a.`Id`, a.`Clicks`, a.`TypeGuid`, a.`Title`, a.`CreateTime` -FROM ( SELECT a.`Id`, a.`Clicks`, a.`TypeGuid`, a.`Title`, a.`CreateTime` - FROM `tb_topic` a - WHERE ((a.`Title`) LIKE '%xxx%') ) a -limit 0,20) ftb - -UNION ALL - -SELECT * from (SELECT a.`Id`, a.`Clicks`, a.`TypeGuid`, a.`Title`, a.`CreateTime` -FROM ( SELECT a.`Id`, a.`Clicks`, a.`TypeGuid`, a.`Title`, a.`CreateTime` - FROM `tb_topic` a - WHERE ((a.`Title`) LIKE '%yyy%') ) a -limit 0,20) ftb + FROM ( SELECT a.`Id`, a.`Clicks`, a.`TypeGuid`, a.`Title`, a.`CreateTime` + FROM `tb_topic` a + WHERE ((a.`Title`) LIKE '%xxx%') ) a + limit 0,20) ftb + + UNION ALL + + SELECT * from (SELECT a.`Id`, a.`Clicks`, a.`TypeGuid`, a.`Title`, a.`CreateTime` + FROM ( SELECT a.`Id`, a.`Clicks`, a.`TypeGuid`, a.`Title`, a.`CreateTime` + FROM `tb_topic` a + WHERE ((a.`Title`) LIKE '%yyy%') ) a + limit 0,20) ftb ``` @@ -232,30 +229,30 @@ Call WithSql multiple times. If you need to paging, you need to follow the two s ```csharp var sql = fsql.Select() - .WithSql("SELECT * FROM tb_topic where id > 11") - .WithSql("SELECT * FROM tb_topic where id < 10") - .ToSql("*") + .WithSql("SELECT * FROM tb_topic where id > 11") + .WithSql("SELECT * FROM tb_topic where id < 10") + .ToSql("*") ``` The above code will be generated as a Sql statement using `UNION ALL`: ```sql - SELECT * from (SELECT * - FROM ( SELECT * FROM tb_topic where id > 11 ) a) ftb +SELECT * from (SELECT * + FROM ( SELECT * FROM tb_topic where id > 11 ) a) ftb - UNION ALL + UNION ALL - SELECT * from (SELECT * - FROM ( SELECT * FROM tb_topic where id < 10 ) a) ftb + SELECT * from (SELECT * + FROM ( SELECT * FROM tb_topic where id < 10 ) a) ftb ``` - Step 2: on the basis of the SQL statement containing `UNION ALL`, page by calling the `Page` method: ```csharp var sql2 = g.mysql.Select() - .WithSql(sql) - .Page(2, 10) - .ToSql(); + .WithSql(sql) + .Page(2, 10) + .ToSql(); ``` ```sql SELECT a.`Id`, a.`Clicks`, a.`TypeGuid`, a.`Title`, a.`CreateTime` diff --git a/withsql.md b/withsql.md index 7021357..d530b05 100644 --- a/withsql.md +++ b/withsql.md @@ -40,21 +40,21 @@ ```csharp DataTable dt1 = _fsql.Select() - .WithSql("select * from TestClass ") - .ToDataTable("ID,Age"); + .WithSql("select * from TestClass ") + .ToDataTable("ID,Age"); ``` ```sql SELECT ID,Age - FROM(select * from TestClass ) a + FROM(select * from TestClass ) a ``` ### 2.返回DataTable ```csharp DataTable dt2 = _fsql.Select() - .WithSql("select * from TestClass ") - .ToDataTable("*"); + .WithSql("select * from TestClass ") + .ToDataTable("*"); ``` ```sql SELECT * @@ -66,25 +66,25 @@ FROM ( select * from TestClass ) a ```csharp List<(string,string)> list1 = _fsql .Select() - .WithSql("select * from TestClass ") - .ToList<(string, string)>("ID,Age"); + .WithSql("select * from TestClass ") + .ToList<(string, string)>("ID,Age"); ``` ```sql SELECT ID, Age - FROM(select * from TestClass ) a + FROM(select * from TestClass ) a ``` ### 4.返回`List` ```csharp var list2 = _fsql.Select() - .WithSql("select * from TestClass ") - .ToList("*"); + .WithSql("select * from TestClass ") + .ToList("*"); ``` ```sql SELECT * - FROM(select * from TestClass ) a + FROM(select * from TestClass ) a ``` ### 5.返回`List` 且能支持分页 @@ -92,16 +92,16 @@ SELECT * ```csharp var list3 = _fsql.Select() .WithSql("select * from TestClass ") - .WhereIf(true, "1=1") - .Page(1, 10).OrderBy("ID DESC") - .ToList("ID,Age"); + .WhereIf(true, "1=1") + .Page(1, 10).OrderBy("ID DESC") + .ToList("ID,Age"); ``` ```sql SELECT ID, Age - FROM(select * from TestClass ) a - WHERE(1 = 1) - ORDER BY ID DESC - limit 0,10 + FROM(select * from TestClass ) a + WHERE(1 = 1) + ORDER BY ID DESC + limit 0,10 ``` ### 6.返回`List`且能支持分页 @@ -109,18 +109,18 @@ SELECT ID, Age ```csharp var list4 = _fsql.Select() .WithSql("select * from TestClass ") - .WhereIf(true, "1=1") - .Page(1, 10) - .OrderBy("ID DESC") - .ToList("ID,Age,BIRTH_DAY as Birthday"); + .WhereIf(true, "1=1") + .Page(1, 10) + .OrderBy("ID DESC") + .ToList("ID,Age,BIRTH_DAY as Birthday"); ``` ```sql SELECT ID,Age,BIRTH_DAY as Birthday - FROM(select * from TestClass ) a - WHERE(1 = 1) - ORDER BY ID DESC - limit 0,10 + FROM(select * from TestClass ) a + WHERE(1 = 1) + ORDER BY ID DESC + limit 0,10 ``` @@ -187,13 +187,12 @@ fsql.Ado.CommandFluent($"{sql1} UNION ALL {sql2}") .ExecuteDataTable(); ``` - - ## 分页问题 + Union All 之后 如果直接 分页会有一个问题。请看具体示例 +多次 WithSql + Page 存在问题：每个WithSql内都有一个Page分页 -### 多次WithSql+Page存在问题：每个WithSql内都有一个Page分页 ```csharp var sql1 = fsql.Select() .Where(a => a.Title.Contains("xxx")) @@ -207,18 +206,18 @@ fsql.Select().WithSql(sql1).WithSql(sql2).Page(1, 20).ToList(); ```sql SELECT * from (SELECT a.`Id`, a.`Clicks`, a.`TypeGuid`, a.`Title`, a.`CreateTime` -FROM ( SELECT a.`Id`, a.`Clicks`, a.`TypeGuid`, a.`Title`, a.`CreateTime` - FROM `tb_topic` a - WHERE ((a.`Title`) LIKE '%xxx%') ) a -limit 0,20) ftb - -UNION ALL - -SELECT * from (SELECT a.`Id`, a.`Clicks`, a.`TypeGuid`, a.`Title`, a.`CreateTime` -FROM ( SELECT a.`Id`, a.`Clicks`, a.`TypeGuid`, a.`Title`, a.`CreateTime` - FROM `tb_topic` a - WHERE ((a.`Title`) LIKE '%yyy%') ) a -limit 0,20) ftb + FROM ( SELECT a.`Id`, a.`Clicks`, a.`TypeGuid`, a.`Title`, a.`CreateTime` + FROM `tb_topic` a + WHERE ((a.`Title`) LIKE '%xxx%') ) a + limit 0,20) ftb + + UNION ALL + + SELECT * from (SELECT a.`Id`, a.`Clicks`, a.`TypeGuid`, a.`Title`, a.`CreateTime` + FROM ( SELECT a.`Id`, a.`Clicks`, a.`TypeGuid`, a.`Title`, a.`CreateTime` + FROM `tb_topic` a + WHERE ((a.`Title`) LIKE '%yyy%') ) a + limit 0,20) ftb ``` @@ -226,39 +225,42 @@ limit 0,20) ftb WithSql 可以和 AsTable 实现分表的功能。 -分表跨表查询的时候，分页是要向每个子表（即每个WithSql中的SQL分页）都生效。 +分表跨表查询的时候，分页是要向每个子表（即每个 WithSql 中的 SQL 分页）都生效。 ## 解决方案 -### 多次withsql，如需分页，需要按下面的二步操作 +多次 withsql ，如需分页，需要按下面的二步操作 + - 第一步：通过witsql，将二个sql组成一个sql。 ```csharp var sql = fsql.Select() - .WithSql("SELECT * FROM tb_topic where id > 11") - .WithSql("SELECT * FROM tb_topic where id < 10") - .ToSql("*") + .WithSql("SELECT * FROM tb_topic where id > 11") + .WithSql("SELECT * FROM tb_topic where id < 10") + .ToSql("*") ``` -如上生成的UOION ALL的sql +如上生成的 UOION ALL 的 sql ```sql - SELECT * from (SELECT * - FROM ( SELECT * FROM tb_topic where id > 11 ) a) ftb +SELECT * from (SELECT * + FROM ( SELECT * FROM tb_topic where id > 11 ) a) ftb - UNION ALL + UNION ALL - SELECT * from (SELECT * - FROM ( SELECT * FROM tb_topic where id < 10 ) a) ftb + SELECT * from (SELECT * + FROM ( SELECT * FROM tb_topic where id < 10 ) a) ftb ``` -- 第二步：之后 调用Page则是通过Union ALL后的结果上分页 +- 第二步：之后 调用 Page 则是通过 Union ALL 后的结果上分页 + ```csharp var sql2 = g.mysql.Select() - .WithSql(sql) - .Page(2, 10) - .ToSql(); + .WithSql(sql) + .Page(2, 10) + .ToSql(); ``` + ```sql SELECT a.`Id`, a.`Clicks`, a.`TypeGuid`, a.`Title`, a.`CreateTime` FROM ( SELECT * from (SELECT *