Question

我想创建存储过程，该存储过程根据输入参数有条件地输出JSON。无需重复执行select语句就可以做到吗？

CREATE PROCEDURE myProcedure @outputJson bit 
AS
BEGIN

        IF outputJson = 1
        BEGIN

            SELECT col1,
                   col2,
                   col3
              FROM dbo.MyTable 
               FOR JSON PATH    

        END
        ELSE
        BEGIN

            SELECT col1,
                   col2,
                   col3
              FROM dbo.MyTable 

        END

END
GO

Answer 1

您可以使用动态SQL在参数中包含“ FOR JSON”子句。

CREATE PROCEDURE dbo.myProcedure @outputJson bit
AS
BEGIN
    DECLARE @sql nvarchar(max) = N'SELECT col1, col2, col3 FROM dbo.MyTable';

    IF @outputJson = 1
    BEGIN
        SET @sql += ' FOR JSON PATH';
    END

    EXECUTE sp_executesql @sql;
END
GO

在存储过程中有条件地使用FOR JSON PATH

1 个答案: