Question

我有以下存储过程：

ALTER Procedure _MySP (@oDate date)
AS
BEGIN
     SELECT * 
     FROM _table1
     WHERE oDate >= @oDate
END

我想用以下内容修改查询：

IF @oDate <= '2017-06-01' 
THEN 
    SELECT * 
    FROM _table2 
ELSE  
    SELECT * 
    FROM _table1 
END

我怎样才能做到这一点？请指教。

谢谢。

Answer 1

你试过这个吗？

alter Procedure _MySP (@oDate date)
as
begin
    If @oDate <= '2017-06-01'
        SELECT * FROM _table2
    else
        SELECT * FROM _table1
end;

Answer 2

alter Procedure _MySP (@oDate date)
as
begin
     select * from _table1 where @oDate => '2017-06-01'
     select * from _table2 where @oDate <= '2017-06-01'
end

应该做的伎俩。希望你没有平等的想法。

Answer 3

IF @oDate <= '2017-06-01'
BEGIN
    SELECT * FROM _table1
    --where--
END
ELSE
BEGIN
    SELECT * FROM _table2  
    --where--
END

Answer 4

请试一试。

ALTER PROCEDURE _MySP (@oDate date)
BEGIN
IF (@oDate < = '2017-06-01')

BEGIN

   SELECT * FROM _table2 

END

ELSE

BEGIN

   SELECT * FROM _table1

END


END

CASE或IF然后SELECT SQL

4 个答案: