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Updated 多表查询 (markdown)

2881099
2019-07-19 19:10:01 +08:00
parent b5e4e95d7b
commit 63e5650f6b
1 changed files with 2 additions and 2 deletions
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多表查询.md

@@ -172,8 +172,8 @@ fsql.Select<t1>()
```sql
SELECT ...
FROM t1
LEFT JOIn t2 on ...
WHERE t1.IsDeleted = 0 && t2.IsDeleted = 0
LEFT JOIn t2 on ... AND (t2.IsDeleted = 0)
WHERE t1.IsDeleted = 0
```
当其中的实体可附加表达式才会进行，支持子表查询。单次查询使用的表数目越多收益越大。