如何使用一个select语句提取多个ID？

Question

我们假设该表有ID（1,2,3,4,5）。我想用一个选择语句拉出1,4,5。我该怎么办？

Select m.Member_ID,m.Member_Name,r.Title from Member m,Record r
where m.Member_ID=r.Member_ID
and m.Member_ID=79

我想提取多个ID而不是79.

Answer 1

最简单的方法是使用IN()

Select m.Member_ID,m.Member_Name,r.Title from Member m,Record r
where m.Member_ID=r.Member_ID
and m.Member_ID IN(1,4,5)

虽然您也可以在WHERE子句中单独列出。只需确保将它们包装在括号中以确保操作员正确行事。

Select m.Member_ID,m.Member_Name,r.Title from Member m,Record r
where m.Member_ID=r.Member_ID
and (m.Member_ID=1 OR m.Member_ID=4  OR m.Member_ID=5)

Answer 2

您应该使用in声明。但是，您应该学习正确的，明确的join语法：

Select m.Member_ID, m.Member_Name, r.Title
from Member m join
     Record r
     on m.Member_ID = r.Member_ID
where m.Member_ID in (1, 4, 5);