I am working in Visual Studio and using the SQL manager built into the studio. Now I am connecting to several databases and I would very much like to be able to save and open my SQL queries and still have them access the correct database and table.
So:
Database servers:
db.company.com
databasenumber1
databasenumber2
databasenumber3
db2.company.com
databasenumber1
databasenumber2
databasenumber3
db3.company.com
databasenumber1
databasenumber2
databasenumber3
Now I wish to write an sql query that does something simple, lets say:
select * from users where userid = '12';
However I want to select this from database server db2 and from database databasenumber3.
How do I write that in a use statement? Or is there something other than "use"??
Working among several databases in once script file requires USE followed by GO statement.
USE db1;
GO
SQL statements ...
...
USE db2;
GO
SQL statements ...
...
Another option is to use server.dbname.tablename format but that strictly requires that all of your databases are hosted on same server.
SELECT * FROM server.db1.table1
SELECT * FROM server.db2.table2
...
Related
I am a new database intern working with a access front end and SQL server backend database. The database was custom made for the company. One of my assignments is to take scripts and apply them to make four new tables. I am aware that I need to make a new query for each new table but I don't know if I should make the query in SQL server management studio or the frontend access program. I have tried copying and pasting the given scripts into a new query in access but I get an error message "invalid SQL statement expected 'DELETE', 'INSERT'...". I decided to try to break done the program a little bit and tested the first line
IF EXISTS (SELECT * FROM sys.foreign_keys WHERE object_id =OBJECT_ID(N'[dbo] .[FK_tblInstrumentInterfaceLog_tlkpInstrument]') AND parent_object_id = OBJECT_ID(N'[dbo].[tblInstrumentInterfaceLog]'))
but the same error message keeps popping up. I even tried just SELECT * FROM sys.foreign_keys, and I got the error message "could not find file...". I am very much a beginner and any guidance would be appreciated.Basically am I supposed to be applying these scripts the server SQL database or on the front end access program?
Are you using a pass-through query? i.e. not just a select query. Access needs to know where to send the query and since you are using TSQL not Access SQL this needs to be executed on the server.
Normally when you query a linked table the information of how to get the data (the connection string) is tied to the table. But for this kind of query you'll probably need to tell Access explicitly. Unless you are using an ADP/ADE, then the connection info travels with the program not the table.
As a general rule, you use SQL management studio (SSMS) to create and run those scripts. So the general accepted approach here is such scripts will not be placed in the front end. As noted such scripts if for some reason must be placed in the front end, then you have to create them as pass-though, but EVEN in this case you want to use the SSMS to create such quires.
So the answer here is you create the new scripts and make table queries in the back end, or in this case using the SQL server management studio.
The syntax checking, query editor etc. in recent versions of SSMS now has auto-complete etc. and you can test/write/update those scripts in SQL server. Once you have such a query or even several of them, then the resulting “several” statements can be pasted into a front end query that been created as pass-though. If you do not use a pass-though query, then you are creating and using and assuming client side SQL (JET (now called ACE)).
The client side has it own version of SQL syntax, and it is NOT 100% compatible with the SERVER SIDE. If you writing SQL in the client that is NOT pass though, then you using a linked table to SQL server. These linked tables thus will use local (JET/ACE) based SQL queries. The ODBC driver thus translates this SQL into server side compatible syntax. However the JET/ACE sql syntax is very limited when compared to SQL server and no server side commands exist in this SQL syntax for the client data engine (JET/ACE)
So for many quires, you will and can simply build such queries using the Access query builder.
However for SQL that needs to run 100% server side then such quires has to be setup as pass-though and are in most cased built + tested using SSMS.
How can I select data in the same query from two different databases that are on two different servers, one DB2 Server and the other a SQL Server?
On your sql server, set up a linked server to the db2 database.
Then write your query on sql server. I suggest that you use openquery for the db2 stuff. If you have to combine the data, populate a sql server temp table with the openquery results and work from there.
The reason I suggest this is performance. I have found that if you use this syntax
select somefields
from server.database.owner.table
where whatever
sql server will bring back the entire table from the linked server and apply the where clause afterwards.
You can set up a linked server http://support.microsoft.com/kb/222937
How to create a linked server
I have database connection to database DB1. The only thing I could do - execute any t-sql statements including using stored procedures. I want to export the specific table (or even the specific rows of specific table) to my local database. As you can read abve, DBs are on diffrent servers meaning no direct connection is possible. Therefore question: Is it possible to write query that returns the other query to execute on local server and get data? Also note, that table contains BLOBs. Thanks.
If you have SQL Server Management Studio, you can use the data import function on your local database to get the data. It works as long as you have Read/Select access on the tables you are trying to copy.
If you have Visual Studio you can use the database tools in there to move data between two servers as long as you can connect to both from your workstation.
Needs Ultimate or Premium though:
http://msdn.microsoft.com/en-us/library/dd193261.aspx
RedGate has some usefull tools too:
http://www.red-gate.com/products/sql-development/sql-compare/features
Maybe you should ask at https://dba.stackexchange.com/ instead.
If you can login to the remote db (where you can only issue t-sql), you may create linked server on your local server to the remote and use it later directly in queries, like:
select * from [LinkedServerName].[DatabaseName].[SchemaName].[TableName]
I need to create sql database just like other sql database (without the data) via sql script
some one told me that Oracle has this ability by some code like
create database <your new DB name> as <the old DB name>
so is there a similar statement or workaround in SQL
I use MS-SQL Server 2008/2008R2
I don't want the 'generate scrip' solution as this provide a very long script, I just need the Oracle statement (mentioned above) but in SQL
to be more clear I need the tables structure only (no data) and need all other objects such as functions, views etc...
Please advice,
In SQL Server, you can right click on the database then select "Tasks" then "Generate Scripts" and you can build one script for all your object sans data.
If you are asking about SQL Server (at least in 2005 or newer, not sure about previous versions) if you right click on a Database in SQL Server Management Studio Go To Tasks and then Generate Scripts you have the option to Generate a script to create all the object ins the Database w/o Data.
Update:
You can also right click on a User Database and select Script Database as -> Create To just to get the TSQL to create the DB itself without any of the tables, stored procedure etc.
Have a need to filter any and all SELECT statements against a particular table in a SQL Server 2008 database. Basically need to add an an additional condition (or create one) to all SELECTS.
So the server receives a request for SELECT * FROM PRODUCTS, we need to change this to
SELECT * FROM PRODUCTS WHERE Condition = 1
I'm open to just about any solution, anyone have any thoughts on how to achieve this?
Not our program, this would be a modification to an ERP package at the database level.
Embedded CLR is an available option, if it helps