作业帮select * from userinfo a inner join emp b on a.userinfoid like b.userinfoid||'%' 解释下后面||'%'意
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select * from userinfo a inner join emp b on a.userinfoid like b.userinfoid||'%' 解释下后面||'%'意
select * from userinfo a inner join emp b on a.userinfoid like b.userinfoid||'%' 解释下后面||'%'意
select * from userinfo a inner join emp b on a.userinfoid like b.userinfoid||'%' 解释下后面||'%'意
在a与b表的内关联下 在a表下的userinfoid 与在b表下找到的userinfoid 或是任意数量的字符； 就是查所有,
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