[Err] 1222 - The used SELECT statements have a different number of columns
一、错误描述html [Err] 1222 - The used SELECT statements have a different number of columns [SQL]SELECT t.id,t.eage,t.ename,t.esex FROM emp t
UNION ALL
SELECT s.age,s.`name`,s.id FROM t_stu_info s;
[Err] 12
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