mysql limit 1 (報錯信息：Subquery returns more than 1 row)
limit 1： 查詢出滿足條件的一條結果就返回，避免全表掃描。 舉例說明： 列出那些薪金等於部門10030中的任何一個僱員的薪金的僱員的姓名和薪金 查詢語句： select ename,salary from t_emp where salary=(select salary from t_emp where deptid=10030 limit 1); 查詢結果： 要查詢的t_emp表： 以上
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相關文章
- 1. 關於mysql錯誤：Subquery returns more than 1 row
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