Cannot drop database because it is currently in use

Question

I want to drop a database. I have used the following code, but to no avail.

public void DropDataBase(string DBName,SqlConnection scon)
{
    try
    {
               


        

Answer 1

First check the connected databases

SP_WHO

Second Disconnect your database

DECLARE @DatabaseName nvarchar(50)
SET @DatabaseName = N'your_database_name'

DECLARE @SQL varchar(max)

SELECT @SQL = COALESCE(@SQL,'') + 'Kill ' + Convert(varchar, SPId) + ';'
FROM MASTER..SysProcesses
WHERE DBId = DB_ID(@DatabaseName) AND SPId <> @@SPId

--SELECT @SQL 
EXEC(@SQL)

FINALLY DROP IT

drop database your_database

Answer 2

Someone connected to the database. Try to switch to another database and then, to drop it:

Try

SP_WHO to see who connected

and KILL if needed

Answer 3

First make your data base offline after that detach it e.g.

Use Master
GO
ALTER DATABASE dbname SET OFFLINE
GO
EXEC sp_detach_db 'dbname', 'true'

Answer 4

I wanted to call out that I used a script that is derived from two of the answers below.

Props to @Hitesh Mistry and @unruledboy

DECLARE @DatabaseName nvarchar(50)
SET @DatabaseName = N'[[[DatabaseName]]]'

DECLARE @SQL varchar(max)

SELECT @SQL = COALESCE(@SQL,'') + 'Kill ' + Convert(varchar, SPId) + ';'
FROM MASTER..SysProcesses
WHERE DBId = DB_ID(@DatabaseName) AND SPId <> @@SPId

EXEC(@SQL)

alter database [[[DatabaseName]]] set single_user with rollback immediate

DROP DATABASE [[[DatabaseName]]]

Answer 5

A brute force workaround could be:

1. Stop the SQL Server Service.

2. Delete the corresponding .mdf and .ldf files.

3. Start the SQL Server Service.

4. Connect with SSMS and delete the database.

Answer 6

You cannot drop a database currently being used however you can use sp_detach_db stored procedure if you want to remove a database from the server without deleting the database files.