How to Creating, altering and dropping a database.?

Here  we will learn. How to creating, altering and dropping a database.
A SQL Server database can be created, altered and dropped
1. Graphically using SQL Server Management Studio (SSMS) or

2. Using a Query

To create the database graphically

1. Right Click on Databases folder in the Object explorer

2. Select New Database

3. In the New Database dialog box, enter the Database name and click OK.

To Create the database using a query

Syntax:

             Create database DatabaseName

Like   

              Create database dev 

Whether, you create a database graphically using the designer or, using a query, the following 2 files gets generated.

.MDF file - Data File (Contains actual data)

.LDF file - Transaction Log file (Used to recover the database)

To alter a database, once it's created 

Syntax:

           Alter database DatabaseName Modify Name = NewDatabaseName

for Example:  Alter DatabaseName 'dev' = 'Sample'

Alternatively, you can also use system stored procedure

Execute sp_renameDB 'OldDatabaseName','NewDatabaseName'

To Delete or Drop a database

Drop Database Database 

That you want to drop

For Example :Drop database Test

Dropping a database, deletes the LDF and MDF files.

You cannot drop a database, if it is currently in use. You get an error stating - Cannot drop database "NewDatabaseName" because it is currently in use. So, if other users are connected, you need to put the database in single user mode and then drop the database.

Alter Database DatabaseName Set SINGLE_USER With Rollback Immediate

With Rollback Immediate option, will rollback all incomplete transactions and closes the connection to the database.