Dropping and recreating databases in Microsoft SQL Server

Question

I am experimenting and learning with Microsoft SQL Server 2008 R2 SP1. I have a database where I made many experiments. Now I would like to drop and recreate it. So I extract th

Answer 1

Requiring the DBName to be typed more than once is error prone, at some point it'll be executed with inconsistent entries and unintended consequences.

The answers from AnandPhadke or Pierre with variable support would be preferred for me.

DECLARE @DBName varchar(50) = 'YourDatabaseName'
USE master
IF EXISTS(select * from sys.databases where name= @DBName)
EXEC('DROP DATABASE ' + @DBName)

EXEC('CREATE DATABASE ' + @DBName)

or

DECLARE @DBName varchar(50) = 'YourDatabaseName'
WHILE EXISTS(select NULL from sys.databases where name = @DBName )
BEGIN
    DECLARE @SQL varchar(max)
    SELECT @SQL = COALESCE(@SQL,'') + 'Kill ' + Convert(varchar, SPId) + ';' FROM MASTER..SysProcesses WHERE DBId = DB_ID(@DBName) AND SPId <> @@SPId
    EXEC(@SQL)
    EXEC('DROP DATABASE ' + @DBName)
END
GO