mirror of
https://github.com/dotnetcore/FreeSql.git
synced 2026-02-06 08:20:52 +08:00
Updated 多表查询 (markdown)
7
多表查询.md
7
多表查询.md
@@ -49,18 +49,19 @@ fsql.Select<Topic, Category, CategoryType>()
|
||||
.LeftJoin((a,b,c) => a.CategoryId == b.Id)
|
||||
.LeftJoin((a,b,c) => b.ParentId == c.Id)
|
||||
.Where((a,b,c) => c.Id > 0)
|
||||
.ToList();
|
||||
.ToList((a,b,c) => new { a,b,c });
|
||||
|
||||
//或者
|
||||
fsql.Select<Topic>().From<Category, CategoryType>((s, b, c) => s
|
||||
.LeftJoin(a => a.CategoryId == b.Id)
|
||||
.LeftJoin(a => b.ParentId == c.Id))
|
||||
.Where((a,b,c) => c.Id > 0)
|
||||
.ToList();
|
||||
//SELECT a.`Id`, a.`Title`, a.`Clicks`, a.`CreateTime`, a.`CategoryId`, b.`Id` as6, b.`Name`, b.`ParentId`
|
||||
.ToList((a,b,c) => new { a,b,c });
|
||||
//SELECT ...
|
||||
//FROM `Topic` a
|
||||
//LEFT JOIN `Category` b ON a.`CategoryId` = b.`Id`
|
||||
//LEFT JOIN `CategoryType` c ON b.`ParentId` = c.`Id`
|
||||
WHERE c. `Id` > 0
|
||||
```
|
||||
|
||||
## 3、SQL联表
|
||||
|
||||
Reference in New Issue
Block a user