MySQL 多表嵌套查询：[Err] 1248 – Every derived table must have its own alias-CFANZ编程社区

MySQL 多表嵌套查询：[Err] 1248 – Every derived table must have its own alias

炽凤亮尧

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2022-09-14

SELECT DISTINCT score 
FROM (
 SELECT score
 FROM student
 WHERE score>60
)AS tt

多表嵌套：一个表的查询结果作为另一个表的查询表

报错原因：每个派生出来的表必须有一个自己的别名，所以表后加AS 任意表名即可

效果：

MySQL 多表嵌套查询：[Err] 1248 – Every derived table must have its own alias_数据库