在Microsoft SQL Server中删除并重新创建数据库

Question

我正在尝试和学习Microsoft SQL Server 2008 R2 SP1.我有一个数据库,我做了很多实验.现在我想放弃并重新创建它.所以我从数据库中提取创建脚本,我删除它,然后使用脚本重新创建它.令我惊讶的是,所有的桌子,钥匙等仍然存在.如何删除数据库,以便从头开始重建数据库？

Answer 1

USE master
IF EXISTS(select * from sys.databases where name='yourDBname')
DROP DATABASE yourDBname

CREATE DATABASE yourDBname

Answer 2

给AnandPhadke +1他的部分代码

此代码将关闭与数据库的所有活动连接,然后将其删除

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

CREATE DATABASE YourDBName
GO

Answer 3

要求DBName被多次键入是容易出错的,在某些时候它会以不一致的条目和意外后果执行.

来自AnandPhadke或Pierre的答案对我来说是首选.

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

EXEC('CREATE DATABASE ' + @DBName)

要么

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

Answer 4

SQL Server 2016(及更高版本)支持一行和原子(？)语法 DROP DATABASE IF EXISTS database_name

参考:https://msdn.microsoft.com/en-us/library/ms178613.aspx