Working with SQL Server

Feb 18, 2017

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Microsoft SQL Server T-SQL in 10 Minutes, Sams Teach Yourself, 2nd Edition

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Selecting a Database

As you’ve just seen, when you first connect to SQL Server, a default database is opened for you. This is usually a database named master (which as a rule you should never play with). Before you perform any database operations, you need to select the appropriate database. You did this using the drop-down box in the toolbar, but you can also select the database using the SQL USE keyword.

For example, to use the learnsql database, you would enter the following (in a query window) and execute it:

Input

USE learnsql;

Output

Command(s) completed successfully.

Analysis

The USE statement does not return any results, but you will see a message confirming that the command was successfully completed.

TIP: USE Or Interactive Database Selection?

In SQL Server Management Studio you may select a database from the drop-down list in the toolbar to use it. So why do you need the USE statement? Well, although you’ll not actually see the USE command being issued when making a selection from the Database drop-down, SQL Server Management Studio is using USE internally to select the database, just as you did in the Query window. So even if you use the drop-down list, you are still using the USE command.

Remember, you must always USE a database before you can access any data in it.

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