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摘要: 1. 子查询用 count 作为返回值 期望的 SQL 类似于: select (select count(*) from child where child.pid = parent.id) as auth_exists from parent 写法: subquery = Subquery(Ch 阅读全文
posted @ 2024-06-28 23:35 kingron 阅读(10) 评论(0) 推荐(0) 编辑