Question

SELECT col1,
       col2,
       col3,

EXEC GetAIntFromStoredProc(T.col1) AS col4
     FROM Tbl AS T
     WHERE (col2 = @parm)

如何在SQL Server 2008中编写此SQL查询？

Answer 1

谢谢@twoleggedhorse。

这是解决方案。

首先我们创建了一个函数

CREATE FUNCTION GetAIntFromStoredProc(@parm Nvarchar(50)) RETURNS INTEGER

AS
BEGIN
   DECLARE @id INTEGER

   set @id= (select TOP(1) id From tbl where col=@parm)

   RETURN @id
END

然后我们进行选择查询

Select col1, col2, col3,
GetAIntFromStoredProc(T.col1) As col4
From Tbl as T
Where col2=@parm

Answer 2

函数很容易在select循环中调用，但它们不允许你运行插入，更新，删除等。它们仅对查询操作有用。您需要一个存储过程来操作数据。

所以，这个问题的真正答案是你必须通过＆＃34;游标＆＃34;迭代select语句的结果。并从该循环内调用该过程。这是一个例子：

DECLARE @myId int;
DECLARE @myName nvarchar(60);
DECLARE myCursor CURSOR FORWARD_ONLY FOR
    SELECT Id, Name FROM SomeTable;
OPEN myCursor;
FETCH NEXT FROM myCursor INTO @myId, @myName;
WHILE @@FETCH_STATUS = 0 BEGIN
    EXECUTE dbo.myCustomProcedure @myId, @myName;
    FETCH NEXT FROM myCursor INTO @myId, @myName;
END;
CLOSE myCursor;
DEALLOCATE myCursor;

请注意@@FETCH_STATUS是一个标准变量，可以为您更新。这里的其余对象名称是自定义的。

Answer 3

只要您在存储过程中没有执行任何INSERT或UPDATE语句，您可能希望将其作为一个函数。

存储过程用于由外部程序执行，或者在定时间隔执行。

这里的答案将比我更好地解释：

Function vs. Stored Procedure in SQL Server

Answer 4

“不可能”。您可以使用函数代替存储过程。

Answer 5

“不可能”。您可以使用此查询来执行此操作。在此处初始化

declare @sql nvarchar(4000)=''

使用参数设置sp的Value和exec命令

SET @sql += ' Exec spName @param'
EXECUTE sp_executesql @sql,  N'@param type', @param = @param

Answer 6

您可以创建一个与proc输出匹配的临时表并将其插入。

irecv()

Answer 7

创建动态视图并从中获取结果。......

CREATE PROCEDURE dbo.usp_userwise_columns_value
(
    @userid BIGINT
)
AS 
BEGIN
        DECLARE @maincmd NVARCHAR(max);
        DECLARE @columnlist NVARCHAR(max);
        DECLARE @columnname VARCHAR(150);
        DECLARE @nickname VARCHAR(50);

        SET @maincmd = '';
        SET @columnname = '';
        SET @columnlist = '';
        SET @nickname = '';

        DECLARE CUR_COLUMNLIST CURSOR FAST_FORWARD
        FOR
            SELECT columnname , nickname
            FROM dbo.v_userwise_columns 
            WHERE userid = @userid

        OPEN CUR_COLUMNLIST
        IF @@ERROR <> 0
            BEGIN
                ROLLBACK
                RETURN
            END   

        FETCH NEXT FROM CUR_COLUMNLIST
        INTO @columnname, @nickname

        WHILE @@FETCH_STATUS = 0
            BEGIN
                SET @columnlist = @columnlist + @columnname + ','

                FETCH NEXT FROM CUR_COLUMNLIST
                INTO @columnname, @nickname
            END
        CLOSE CUR_COLUMNLIST
        DEALLOCATE CUR_COLUMNLIST  

        IF NOT EXISTS (SELECT * FROM sys.views WHERE name = 'v_userwise_columns_value')
            BEGIN
                SET @maincmd = 'CREATE VIEW dbo.v_userwise_columns_value AS SELECT sjoid, CONVERT(BIGINT, ' + CONVERT(VARCHAR(10), @userid) + ') as userid , ' 
                            + CHAR(39) + @nickname + CHAR(39) + ' as nickname, ' 
                            + @columnlist + ' compcode FROM dbo.SJOTran '
            END
        ELSE
            BEGIN
                SET @maincmd = 'ALTER VIEW dbo.v_userwise_columns_value AS SELECT sjoid, CONVERT(BIGINT, ' + CONVERT(VARCHAR(10), @userid) + ') as userid , ' 
                            + CHAR(39) + @nickname + CHAR(39) + ' as nickname, ' 
                            + @columnlist + ' compcode FROM dbo.SJOTran '
            END

        EXECUTE sp_executesql @maincmd
END

-----------------------------------------------
SELECT * FROM dbo.v_userwise_columns_value

如何在select查询中执行存储过程

7 个答案: