如何在 sql openquery 中使用参数，例如：
SELECT * FROM OPENQUERY([NameOfLinkedSERVER], 'SELECT * FROM TABLENAME
where field1=@someParameter') T1 INNER JOIN MYSQLSERVER.DATABASE.DBO.TABLENAME
T2 ON T1.PK = T2.PK
问问题
330744 次
14 回答
171
From the OPENQUERY documentation it states that:
OPENQUERY does not accept variables for its arguments.
See this article for a workaround.
UPDATE:
As suggested, I'm including the recommendations from the article below.
Pass Basic Values
When the basic Transact-SQL statement is known, but you have to pass in one or more specific values, use code that is similar to the following sample:
DECLARE @TSQL varchar(8000), @VAR char(2)
SELECT @VAR = 'CA'
SELECT @TSQL = 'SELECT * FROM OPENQUERY(MyLinkedServer,''SELECT * FROM pubs.dbo.authors WHERE state = ''''' + @VAR + ''''''')'
EXEC (@TSQL)
Pass the Whole Query
When you have to pass in the whole Transact-SQL query or the name of the linked server (or both), use code that is similar to the following sample:
DECLARE @OPENQUERY nvarchar(4000), @TSQL nvarchar(4000), @LinkedServer nvarchar(4000)
SET @LinkedServer = 'MyLinkedServer'
SET @OPENQUERY = 'SELECT * FROM OPENQUERY('+ @LinkedServer + ','''
SET @TSQL = 'SELECT au_lname, au_id FROM pubs..authors'')'
EXEC (@OPENQUERY+@TSQL)
Use the Sp_executesql Stored Procedure
To avoid the multi-layered quotes, use code that is similar to the following sample:
DECLARE @VAR char(2)
SELECT @VAR = 'CA'
EXEC MyLinkedServer.master.dbo.sp_executesql
N'SELECT * FROM pubs.dbo.authors WHERE state = @state',
N'@state char(2)',
@VAR
于 2010-07-31T14:48:46.557 回答
16
从MSDN 页面：
OPENQUERY 不接受其参数的变量
从根本上说，这意味着您不能发出动态查询。要实现您的示例正在尝试的内容，请尝试以下操作：
SELECT * FROM
OPENQUERY([NameOfLinkedSERVER], 'SELECT * FROM TABLENAME') T1
INNER JOIN
MYSQLSERVER.DATABASE.DBO.TABLENAME T2 ON T1.PK = T2.PK
where
T1.field1 = @someParameter
显然，如果您的 TABLENAME 表包含大量数据，这也会通过网络传输，性能可能会很差。另一方面，对于少量数据，这很有效，并且避免了一种exec方法可能需要的动态 sql 构造开销（sql 注入、转义引号）。
于 2010-07-31T14:47:27.883 回答
15
构建后，您可以使用 OPENQUERY 执行字符串。如果您走这条路，请考虑安全性并注意不要将用户输入的文本连接到您的 SQL 中！
DECLARE @Sql VARCHAR(8000)
SET @Sql = 'SELECT * FROM Tbl WHERE Field1 < ''someVal'' AND Field2 IN '+ @valueList
SET @Sql = 'SELECT * FROM OPENQUERY(SVRNAME, ''' + REPLACE(@Sql, '''', '''''') + ''')'
EXEC(@Sql)
于 2010-07-31T14:47:24.837 回答
7
Actually, We found a way to do this:
DECLARE @username varchar(50)
SET @username = 'username'
DECLARE @Output as numeric(18,4)
DECLARE @OpenSelect As nvarchar(500)
SET @OpenSelect = '(SELECT @Output = CAST((CAST(pwdLastSet As bigint) / 864000000000) As numeric(18,4)) FROM OpenQuery (ADSI,''SELECT pwdLastSet
FROM ''''LDAP://domain.net.intra/DC=domain,DC=net,DC=intra''''
WHERE objectClass = ''''User'''' AND sAMAccountName = ''''' + @username + '''''
'') AS tblADSI)'
EXEC sp_executesql @OpenSelect, N'@Output numeric(18,4) out', @Output out
SELECT @Output As Outputs
This will assign the result of the OpenQuery execution, in the variable @Output.
We tested for Store procedure in MSSQL 2012, but should work with MSSQL 2008+.
Microsoft Says that sp_executesql(Transact-SQL): Applies to: SQL Server (SQL Server 2008 through current version), Windows Azure SQL Database (Initial release through current release). (http://msdn.microsoft.com/en-us/library/ms188001.aspx)
于 2014-06-12T22:21:08.267 回答
4
DECLARE @guid varchar(36); select @guid= convert(varchar(36), NEWID() );
/*
The one caveat to this technique is that ##ContextSpecificGlobal__Temp should ALWAYS have the exact same columns.
So make up your global temp table name in the sproc you're using it in and only there!
In this example I wanted to pass in the name of a global temporary table dynamically. I have 1 procedure dropping
off temporary data in whatever @TableSrc is and another procedure picking it up but we are dynamically passing
in the name of our pickup table as a parameter for OPENQUERY.
*/
IF ( OBJECT_ID('tempdb..##ContextSpecificGlobal__Temp' , 'U') IS NULL )
EXEC ('SELECT * INTO ##ContextSpecificGlobal__Temp FROM OPENQUERY(loopback, ''Select *,''''' + @guid +''''' as tempid FROM ' + @TableSrc + ''')')
ELSE
EXEC ('INSERT ##ContextSpecificGlobal__Temp SELECT * FROM OPENQUERY(loopback, ''Select *,''''' + @guid +''''' as tempid FROM ' + @TableSrc + ''')')
--If this proc is run frequently we could run into race conditions, that's why we are adding a guid and only deleting
--the data we added to ##ContextSpecificGlobal__Temp
SELECT * INTO #TableSrc FROM ##ContextSpecificGlobal__Temp WHERE tempid = @guid
BEGIN TRAN t1
IF ( OBJECT_ID('tempdb..##ContextSpecificGlobal__Temp' , 'U') IS NOT NULL )
BEGIN
-- Here we wipe out our left overs if there if everyones done eating the data
IF (SELECT COUNT(*) FROM ##ContextSpecificGlobal__Temp) = 0
DROP TABLE ##ContextSpecificGlobal__Temp
END
COMMIT TRAN t1
-- YEAH! Now I can use the data from my openquery without wrapping the whole !$#@$@ thing in a string.
于 2012-05-04T16:28:00.177 回答
2
Combine Dynamic SQL with OpenQuery. (This goes to a Teradata server)
DECLARE
@dayOfWk TINYINT = DATEPART(DW, GETDATE()),
@qSQL NVARCHAR(MAX) = '';
SET @qSQL = '
SELECT
*
FROM
OPENQUERY(TERASERVER,''
SELECT DISTINCT
CASE
WHEN ' + CAST(@dayOfWk AS NCHAR(1)) + ' = 2
THEN ''''Monday''''
ELSE ''''Not Monday''''
END
'');';
EXEC sp_executesql @qSQL;
于 2017-05-22T18:33:26.517 回答
2
We can use execute method instead of openquery. Its code is much cleaner. I had to get linked server query result in a variable. I used following code.
CREATE TABLE #selected_store
(
code VARCHAR(250),
id INT
)
declare @storeId as integer = 25
insert into #selected_store (id, code) execute('SELECT store_id, code from quickstartproductionnew.store where store_id = ?', @storeId) at [MYSQL]
declare @code as varchar(100)
select @code = code from #selected_store
select @code
drop table #selected_store
Note:
if your query doesn't work, please make sure
remote proc transaction promotionis set asfalsefor yourlinked serverconnection.
EXEC master.dbo.sp_serveroption
@server = N'{linked server name}',
@optname = N'remote proc transaction promotion',
@optvalue = N'false';
于 2020-04-23T09:54:26.880 回答
1
In the following example I'm passing a department parameter to a stored procedure(spIncreaseTotalsRpt) and at the same time I'm creating a temp table all from an OPENQUERY. The Temp table needs to be a global Temp (##) so it can be referenced outside it's intance. By using exec sp_executesql you can pass the department parameter.
Note: be careful when using sp_executeSQL. Also your admin might not have this option available to you.
Hope this helps someone.
IF OBJECT_ID('tempdb..##Temp') IS NOT NULL
/*Then it exists*/
begin
DROP TABLE ##Temp
end
Declare @Dept as nvarchar(20) ='''47'''
declare @OPENQUERY as nvarchar(max)
set @OPENQUERY = 'Select ' + @Dept + ' AS Dept, * into ##Temp from openquery(SQL_AWSPROD01,'''
declare @sql nvarchar(max)= @openquery + 'SET FMTONLY OFF EXECUTE SalaryCompensation.dbo.spIncreaseTotalsRpts ' + '''' + @Dept + '''' + ''')'
declare @parmdef nvarchar(25)
DECLARE @param nvarchar(20)
SET @parmdef = N'@Dept varchar(20)'
-- select @sql
-- Print @sql + @parmdef + @dept
exec sp_executesql @sql,@parmdef, @Dept
Select * from ##Temp
Results
Dept increase Cnt 0 1 2 3 4 5 6 0.0000 1.0000 0.0000 0.0000 0.0000 0.0000 0.0000 0.0000
于 2014-04-08T17:18:25.637 回答
1
SELECT field1 FROM OPENQUERY
([NameOfLinkedSERVER],
'SELECT field1 FROM TABLENAME')
WHERE field1=@someParameter T1
INNER JOIN MYSQLSERVER.DATABASE.DBO.TABLENAME
T2 ON T1.PK = T2.PK
于 2014-11-07T11:00:59.627 回答
0
I figured out a way that works for me. It does require the use of a scratch table that a linked server has access to though.
I created a table and populated it with the values I need then I reference that table through a linked server.
SELECT *
FROM OPENQUERY(KHSSQLODSPRD,'SELECT *
FROM ABC.dbo.CLAIM A WITH (NOLOCK)
WHERE A.DOS >= (SELECT MAX(DATE) FROM KHSDASQL01.DA_MAIN.[dbo].[ALLFILENAMES]) ')
于 2015-08-12T23:40:54.283 回答
0
declare @p_Id varchar(10)
SET @p_Id = '40381'
EXECUTE ('BEGIN update TableName
set ColumnName1 = null,
ColumnName2 = null,
ColumnName3 = null,
ColumnName4 = null
where PERSONID = '+ @p_Id +'; END;') AT [linked_Server_Name]
于 2015-08-19T09:16:54.230 回答
0
DECLARE @usernames NVARCHAR(MAX);
SET @usernames = N'';
DECLARE @len INT;
SELECT @usernames = @usernames + ISNULL(username + ''''',''''', '')
FROM #tempusername;
SET @len = len(@usernames);
SET @usernames = N'''''' + LEFT(@usernames, @len - 3);
DECLARE @sql NVARCHAR(MAX);
SET @sql
= N'SELECT *
FROM OPENQUERY
([Linked Server],
''SELECT username
FROM [MySQL Database].[Table Name]
WHERE username IN ( ' + @usernames + N')'')';
I found this workaround on this link https://social.technet.microsoft.com/Forums/en-US/98e0c17a-8ead-4633-a053-51c49b313bd3/how-can-i-use-a-table-variable-as-a-parameter-for-openquery?forum=sqltools&prof=required it was very helpful.
于 2021-07-17T06:14:53.173 回答
-1
Just try it this way, should work, easy! In your WHERE clause, after column name and equal to sign:- add TWO single quotes, your search value and then THREE single quotes. Close the bracket.
SELECT * FROM OPENQUERY([NameOfLinkedSERVER], 'SELECT * FROM TABLENAME where field1=''your search value''') T1 INNER JOIN MYSQLSERVER.DATABASE.DBO.TABLENAME T2 ON T1.PK = T2.PK
于 2020-11-19T21:06:09.560 回答
-2
Simple example based off of @Tuan Zaidi's example above which seemed the easiest. Didn't know you can do the filter on the outside of OPENQUERY... so much easier!
However in my case I needed to stuff it in a variable so I created an additional Sub Query Level to return a single value.
SET @SFID = (SELECT T.Id FROM (SELECT Id, Contact_ID_SQL__c FROM OPENQUERY([TR-SF-PROD], 'SELECT Id, Contact_ID_SQL__c FROM Contact') WHERE Contact_ID_SQL__c = @ContactID) T)
于 2016-09-27T19:15:56.833 回答