如何选择多行mysql表作为单行

2023年8月31日 194次阅读

我有如下的会员表

MemberID    Name     BookID
    1       ABC         10
    1       ABC         14
    2       XYZ         10
    3       PQR         14

我想选择一个包含单行BOOKID 10和14的MemberID.

预期产出：

MemberID
1

我试过下面的代码,但它不起作用：

select MemberID from member where BookID IN (10,14)

最佳答案你可以尝试这样：

SELECT MemberID, GROUP_CONCAT(BookID) AS BookID
FROM member
GROUP BY MemberID
HAVING FIND_IN_SET(10, BookID) > 0 AND FIND_IN_SET(14, BookID) > 0

另一个解决方案是使用JOIN,如下所示：

SELECT x.MemberID
FROM member x
INNER JOIN member y ON x.MemberID = y.MemberID
  AND x.BookID = 10
  AND y.BookID = 14