我有一条需要执行的动态 SQL,然后我需要将结果存储到一个变量中。
我知道我可以使用sp_executesql
,但找不到有关如何执行此操作的明确示例。
如果你有 OUTPUT 参数,你可以做
DECLARE @retval int
DECLARE @sSQL nvarchar(500);
DECLARE @ParmDefinition nvarchar(500);
DECLARE @tablename nvarchar(50)
SELECT @tablename = N'products'
SELECT @sSQL = N'SELECT @retvalOUT = MAX(ID) FROM ' + @tablename;
SET @ParmDefinition = N'@retvalOUT int OUTPUT';
EXEC sp_executesql @sSQL, @ParmDefinition, @retvalOUT=@retval OUTPUT;
SELECT @retval;
但是如果你不这样做,并且不能修改 SP:
-- Assuming that your SP return 1 value
create table #temptable (ID int null)
insert into #temptable exec mysp 'Value1', 'Value2'
select * from #temptable
不漂亮,但有效。
DECLARE @vi INT
DECLARE @vQuery NVARCHAR(1000)
SET @vQuery = N'SELECT @vi= COUNT(*) FROM <TableName>'
EXEC SP_EXECUTESQL
@Query = @vQuery
, @Params = N'@vi INT OUTPUT'
, @vi = @vi OUTPUT
SELECT @vi
DECLARE @tab AS TABLE (col1 VARCHAR(10), col2 varchar(10))
INSERT into @tab EXECUTE sp_executesql N'
SELECT 1 AS col1, 2 AS col2
UNION ALL
SELECT 1 AS col1, 2 AS col2
UNION ALL
SELECT 1 AS col1, 2 AS col2'
SELECT * FROM @tab
返回值通常不用于“返回”结果,而是返回成功 (0) 或错误号 (1-65K)。以上似乎都表明 sp_executesql 没有返回值,这是不正确的。sp_executesql 将返回 0 表示成功,任何其他数字表示失败。
在下面,@i 将返回 2727
DECLARE @s NVARCHAR(500)
DECLARE @i INT;
SET @s = 'USE [Blah]; UPDATE STATISTICS [dbo].[TableName] [NonExistantStatisticsName];';
EXEC @i = sys.sp_executesql @s
SELECT @i AS 'Blah'
SSMS 将显示此消息 2727,级别 11,状态 1,第 1 行找不到索引“NonExistantStaticsName”。
Declare @variable int
Exec @variable = proc_name
如果要返回超过 1 个值,请使用:
DECLARE @sqlstatement2 NVARCHAR(MAX);
DECLARE @retText NVARCHAR(MAX);
DECLARE @ParmDefinition NVARCHAR(MAX);
DECLARE @retIndex INT = 0;
SELECT @sqlstatement = 'SELECT @retIndexOUT=column1 @retTextOUT=column2 FROM XXX WHERE bla bla';
SET @ParmDefinition = N'@retIndexOUT INT OUTPUT, @retTextOUT NVARCHAR(MAX) OUTPUT';
exec sp_executesql @sqlstatement, @ParmDefinition, @retIndexOUT=@retIndex OUTPUT, @retTextOUT=@retText OUTPUT;
返回值在@retIndex 和@retText
DECLARE @ValueTable TABLE
(
Value VARCHAR (100)
)
SELECT @sql = N'SELECT SRS_SizeSetDetails.'+@COLUMN_NAME+' FROM SRS_SizeSetDetails WHERE FSizeID = '''+@FSizeID+''' AND SRS_SizeSetID = '''+@SRS_SizeSetID+'''';
INSERT INTO @ValueTable
EXEC sp_executesql @sql;
SET @Value='';
SET @Value = (SELECT TOP 1 Value FROM @ValueTable)
DELETE FROM @ValueTable
这是你可以尝试的东西
DECLARE @SqlStatement NVARCHAR(MAX) = ''
,@result XML
,@DatabaseName VARCHAR(100)
,@SchemaName VARCHAR(10)
,@ObjectName VARCHAR(200);
SELECT @DatabaseName = 'some database'
,@SchemaName = 'some schema'
,@ObjectName = 'some object (Table/View)'
SET @SqlStatement = '
SELECT @result = CONVERT(XML,
STUFF( ( SELECT *
FROM
(
SELECT TOP(100)
*
FROM ' + QUOTENAME(@DatabaseName) +'.'+ QUOTENAME(@SchemaName) +'.' + QUOTENAME(@ObjectName) + '
) AS A1
FOR XML PATH(''row''), ELEMENTS, ROOT(''recordset'')
), 1, 0, '''')
)
';
EXEC sp_executesql @SqlStatement,N'@result XML OUTPUT', @result = @result OUTPUT;
SELECT DISTINCT
QUOTENAME(r.value('fn:local-name(.)', 'VARCHAR(200)')) AS ColumnName
FROM @result.nodes('//recordset/*/*') AS records(r)
ORDER BY ColumnName
这是很久以前的事了,所以不确定是否仍然需要,但是您可以使用@@ROWCOUNT 变量来查看有多少行受到之前的 sql 语句的影响。
例如,当您构建动态更新语句并使用 exec 运行它时,这很有帮助。@@ROWCOUNT 将显示更新了多少行。
这对我有用:
DECLARE @SQL NVARCHAR(4000)
DECLARE @tbl Table (
Id int,
Account varchar(50),
Amount int
)
-- Lots of code to Create my dynamic sql statement
insert into @tbl EXEC sp_executesql @SQL
select * from @tbl