SQL操作應(yīng)用——子查詢(表名1:a 表名2:b)
提問(wèn)人:ylm發(fā)布時(shí)間:2020-09-30
子查詢(表名1:a 表名2:b)
select a,b,c from a where a IN (select d from b ) 或者: select a,b,c from a where a IN (1,2,3)
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子查詢(表名1:a 表名2:b)
select a,b,c from a where a IN (select d from b ) 或者: select a,b,c from a where a IN (1,2,3)
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