mysql - 将 IF 子句从 MySQL 转移到 SQL Server 2005

Question

如何将此 MySQL 查询转换为 SQL Server 等效项？

SELECT User.id, User.first, User.last,
IF (User.first = q1 OR User.first = q2, 1, 0) +
IF (User.last = q1 OR User.last = q2, 1, 0) as points
FROM users as User
ORDER BY points DESC

Answer 1

IFSQL Server 中的等价物是CASE表达式。（或IIF在 SQL Server 2012中。）我还删除了在这种情况下似乎毫无意义的别名。

SELECT id, first, last, 
  CASE WHEN first IN (q1,q2) THEN 1 ELSE 0 END
  + CASE WHEN last IN (q1,q2) THEN 1 ELSE 0 END AS points
FROM dbo.users
ORDER BY points DESC;