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oyo
2025-10-22 19:27:53 +08:00
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@@ -1493,6 +1493,7 @@ class CreateUserBto { //对应实体user
- exists子查询：`EXISTS(SELECT 1 FROM other_table WHERE ...)` - exists子查询：`EXISTS(SELECT 1 FROM other_table WHERE ...)`
- 简单计数：`SELECT COUNT(*) WHERE ...`或`SELECT COUNT(*) > 0 WHERE ...` - 简单计数：`SELECT COUNT(*) WHERE ...`或`SELECT COUNT(*) > 0 WHERE ...`
- 一层或多层inner join和left join - 一层或多层inner join和left join
- DISTINCT：`SELECT DISTINCT xxx`，虽然读方案语法本身不支持，但是可以使用读方案查出一个对象列表，然后在内存中进行去重即可，无需使用自定义查询
- ❌ 必须自定义查询： - ❌ 必须自定义查询：
- GROUP BY聚合 - GROUP BY聚合
- 数据库内置函数：`SELECT DATE_FORMAT(start_time, '%Y-%m') FROM meeting` - 数据库内置函数：`SELECT DATE_FORMAT(start_time, '%Y-%m') FROM meeting`