[sql-server] SQL Server Linked Server Example Query

While in Management Studio, I am trying to run a query/do a join between two linked servers. Is this a correct syntax using linked db servers:

select foo.id 
from databaseserver1.db1.table1 foo, 
     databaseserver2.db1.table1 bar 
where foo.name=bar.name

Basically, do you just preface the db server name to the db.table ?

select name from drsql01.test.dbo.employee

• drslq01 is servernmae --linked serer
• test is database name
• dbo is schema -default schema
• employee is table name

I hope it helps to understand, how to execute query for linked server

PostgreSQL:

1. You must provide a database name in the Data Source DSN.
2. Run Management Studio as Administrator

3. You must omit the DBName from the query:

   SELECT * FROM OPENQUERY([LinkedServer], 'select * from schema."tablename"')

I have done to find out the data type in the table at link_server using openquery and the results were successful.

SELECT * FROM OPENQUERY (LINKSERVERNAME, '
SELECT DATA_TYPE, COLUMN_NAME
FROM [DATABASENAME].INFORMATION_SCHEMA.COLUMNS
WHERE 
     TABLE_NAME  =''TABLENAME''
')

Its work for me

For what it's worth, I found the following syntax to work the best:

SELECT * FROM [LINKED_SERVER]...[TABLE]

I couldn't get the recommendations of others to work, using the database name. Additionally, this data source has no schema.

Usually direct queries should not be used in case of linked server because it heavily use temp database of SQL server. At first step data is retrieved into temp DB then filtering occur. There are many threads about this. It is better to use open OPENQUERY because it passes SQL to the source linked server and then it return filtered results e.g.

SELECT *
FROM OPENQUERY(Linked_Server_Name , 'select * from TableName where ID = 500')

For those having trouble with these other answers , try OPENQUERY

Example:

 SELECT * FROM OPENQUERY([LinkedServer], 'select * from [DBName].[schema].[tablename]') 

Following Query is work best.

Try this Query:

SELECT * FROM OPENQUERY([LINKED_SERVER_NAME], 'SELECT * FROM [DATABASE_NAME].[SCHEMA].[TABLE_NAME]')

It Very helps to link MySQL to MS SQL

You need to specify the schema/owner (dbo by default) as part of the reference. Also, it would be preferable to use the newer (ANSI-92) join style.

select foo.id 
    from databaseserver1.db1.dbo.table1 foo
        inner join databaseserver2.db1.dbo.table1 bar 
            on foo.name = bar.name

SELECT * FROM OPENQUERY([SERVER_NAME], 'SELECT * FROM DATABASE_NAME..TABLENAME')

This may help you.

If you still find issue with <server>.<database>.<schema>.<table>

Enclose server name in []

select * from [Server].[database].[schema].[tablename] 

This is the correct way to call. Be sure to verify that the servers are linked before executing the query!

To check for linked servers call:

EXEC sys.sp_linkedservers 

right click on a table and click script table as select