sql-server - SQL Server 上的 sql 存储过程中的大小写

Question

基于一个参数，我想在我的存储过程中执行不同的更新。我已经尝试了下面代码的许多排列，但我总是有错误。

    @EmpID int = 0, 
@NewStatus nvarchar(10) = 0
AS
BEGIN
SET NOCOUNT ON;

select CASE   @NewStatus 

when    'InOffice' then 
     Update tblEmployee set InOffice = -1 where EmpID = @EmpID
when   'OutOffice' then 
    Update tblEmployee set InOffice = -1 where EmpID = @EmpID
when 'Home' then 
    Update tblEmployee set Home = -1 where EmpID = @EmpID

END

Answer 1

尝试这个

If @NewStatus  = 'InOffice' 
BEGIN
     Update tblEmployee set InOffice = -1 where EmpID = @EmpID
END
Else If @NewStatus  = 'OutOffice'
BEGIN
    Update tblEmployee set InOffice = -1 where EmpID = @EmpID
END
Else If @NewStatus  = 'Home'
BEGIN
    Update tblEmployee set Home = -1 where EmpID = @EmpID
END

Answer 2

CASE不用于流量控制...为此，您需要使用IF...

但是，这个问题有一个基于集合的解决方案，而不是程序方法：

UPDATE tblEmployee
SET 
  InOffice = CASE WHEN @NewStatus = 'InOffice' THEN -1 ELSE InOffice END,
  OutOffice = CASE WHEN @NewStatus = 'OutOffice' THEN -1 ELSE OutOffice END,
  Home = CASE WHEN @NewStatus = 'Home' THEN -1 ELSE Home END
WHERE EmpID = @EmpID

请注意，如果不满足条件，ELSE遗嘱将保留原始值。@NewStatus

Answer 3

(SELECT CASE WHEN (SELECT  Salary FROM tbl_Salary WHERE Code=102 AND Month=1 AND Year=2020 )=0 THEN 'Pending'
WHEN (SELECT  Salary FROM tbl_Salary WHERE Code=102 AND Month=1 AND Year=2020 AND )<>0 THEN (SELECT CASE  WHEN ISNULL(ChequeNo,0) IS NOT NULL   THEN 'Deposit' ELSE 'Pending' END AS Deposite FROM tbl_EEsi WHERE  AND (Month= 1) AND (Year = 2020) AND )END AS Stat)