Question

SELECT * FROM users WHERE uid IN (SELECT doctors FROM MainPage WHERE Valid=1)

users表格uid INT
Mainpage表doctors text，其值为1,2,3,4,5

当我运行上面的查询时，它只产生1行，这是uid = 1，但我想要所有5行。所以在MySQL中我使用了这个查询：

SELECT *
FROM users
JOIN MainPage ON FIND_IN_SET(uid, doctors)
WHERE Valid = 1;

有效。我试图在{@ 1}}的SQL Server中找到一个等价物来实现相同的结果？

Answer 1

这可能有效

SELECT *
FROM users u
WHERE EXISTS (
    SELECT *
    FROM MainPage
    WHERE CONCAT(',',doctors,',') LIKE CONCAT('%,',u.uid,',%')
        AND Valid = 1
)

Answer 2

自SQL Server 2016（13.x）起，STRING_SPLIT()

SELECT *
FROM users
WHERE uid IN
 (SELECT value FROM STRING_SPLIT(
     (SELECT doctors FROM MainPage WHERE Valid = 1),
     ','))

SQL Server中的FIND_IN_SET（）等价物

2 个答案: