两个查询是否相同?两者都返回相同的结果吗?
1)
IF EXISTS(
SELECT
1
FROM
Users u
WHERE
u.UPIN = @AttendingDoctorID)
BEGIN
SELECT
u.UserId, 1
FROM
Users u WITH(nolock)
WHERE
u.UPIN = @AttendingDoctorID
END ELSE BEGIN
SELECT
u.UserId,
1
FROM
Users u (nolock)
WHERE
u.FirstName = @AttendingDoctorFirstName AND
u.LastName = @AttendingDoctorLastName
END
2)
SELECT
u.UserId, 1
FROM
Users u (nolock)
WHERE
(u.UPIN = @AttendingDoctorID)
OR
(u.FirstName = @AttendingDoctorFirstName AND
u.LastName = @AttendingDoctorLastName)