关于mysql错误：Subquery returns more than 1 row
mysql报错：SQLSTATE[21000]: Cardinality violation: 1242 Subquery returns more than 1 row 错误的意思是指子查询结果多于一行。报错以下： 解决方法： 以select * from table1 where table1.colums=(select columns from table2);这个sql语句为例。 1）若
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