The original code was:
[mw_shl_code=sql,true]insert Group1 select * from( select * Group2 union select * from Group3 union select * from Group4 )t[/mw_shl_code]
The code now is:
[mw_shl_code=sql,true]insert Group1 select * from( select QQNum,Nick,Age,Gender,Auth,QunNum from Group2 union select QQNum,Nick,Age,Gender,Auth,QunNum from Group3 union select QQNum,Nick,Age,Gender,Auth,QunNum from Group4 )t[/mw_shl_code]
Successfully solved!!
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