如何将exec的结果分配给变量

Question

如何将 exec 命令的结果分配给变量。像下面这样，所以当我做 select @sql2 我得到执行的 varchar sql.

的结果

declare @sql varchar(500)
declare @sql2 varchar(max)
set @sql = 'SELECT 
                PDB.OutletBrandID, OB.BrandName
            FROM 
                ProductDistributionBrand PDB
            INNER JOIN 
                [IND_roadchef].dbo.OutletBrands OB 
            ON 
                PDB.OutletBrandID = OB.OutletBrandID

            FOR XML PATH(''ProductDistributionBrandDetail''),ROOT(''ProductDistributionBrandDetails''),TYPE'    
--select @sql
set @sql2 = exec(@sql)  
select @sql2

Answer 1

您可以使用 Table 变量。像这样尝试，

DECLARE @sql TABLE (col1 VARCHAR(500))
DECLARE @sql2 VARCHAR(max)

SET @sql2 = 'SELECT 
                PDB.OutletBrandID, OB.BrandName
            FROM 
                ProductDistributionBrand PDB
            INNER JOIN 
                [IND_roadchef].dbo.OutletBrands OB 
            ON 
                PDB.OutletBrandID = OB.OutletBrandID

            FOR XML PATH(''ProductDistributionBrandDetail''),ROOT(''ProductDistributionBrandDetails''),TYPE'

INSERT INTO @sql
EXEC (@sql2)

SELECT *
FROM @sql

Answer 2

使用输出参数：

declare @sql nvarchar(500)
declare @xml XML

set @sql = 'set @xml = (SELECT ..... FOR XML PATH(''ProductDistributionBrandDetail''),ROOT(''ProductDistributionBrandDetails''),TYPE)'    

EXEC sp_executesql @sql, N'@xml XML output', @xml = @xml OUTPUT

select @xml

Answer 3

请参阅此参考资料link 它将向您展示如何使用输出参数

https://support.microsoft.com/en-us/kb/262499

如何将exec的结果分配给变量

how to assign results from exec to variable

sql-server

exec

varchar