大量刪除資料庫的SQL語句，大量刪除sql語句

大量刪除資料庫的SQL語句，大量刪除sql語句

由於項目需要，每次運行case的時候都需要建立資料庫。雖然每次執行結束都會刪除，但是不保證每次都能刪除成功（這裡有許多原因，我就不列舉了）。所以我寫了個指令碼去大量刪除資料庫。首先為確保我們的資料庫是有用的，不被錯刪除的。所以就必須先備份在刪除。

備份資料庫：

DECLARE @name VARCHAR(50) -- database name  DECLARE @path VARCHAR(256) -- path for backup files  DECLARE @fileName VARCHAR(256) -- filename for backup  DECLARE @fileDate VARCHAR(20) -- used for file name SET @path = 'D:\ABC\Backup\'  SELECT @fileDate = CONVERT(VARCHAR(20),GETDATE(),112) DECLARE db_cursor CURSOR FOR  SELECT name FROM MASTER.dbo.sysdatabases WHERE name IN ('E1DB_ABC','Scheduler')  OPEN db_cursor   FETCH NEXT FROM db_cursor INTO @name   WHILE @@FETCH_STATUS = 0   BEGIN   SET @fileName = @path + @name + '_' + @fileDate + '.BAK'         BACKUP DATABASE @name TO DISK = @fileName          FETCH NEXT FROM db_cursor INTO @name   END   CLOSE db_cursor   DEALLOCATE db_cursor

刪除資料庫：

方法1：

DECLARE @path VARCHAR(256) -- path for backup files  DECLARE @fileName VARCHAR(256) -- filename for backup  DECLARE @fileDate VARCHAR(20) -- used for file name SET @path = 'D:\Backup\'  SELECT @fileDate = CONVERT(VARCHAR(20),GETDATE(),112) DECLARE db_cursor CURSOR FOR  SELECT name FROM MASTER.dbo.sysdatabases WHERE name NOT IN ('master','model','msdb','tempdb','ReportServer'  OPEN db_cursor   DECLARE @databasename VARCHAR(50) -- database name  DECLARE @databaseCount int =0FETCH NEXT FROM db_cursor INTO @databasename  WHILE @@FETCH_STATUS = 0   BEGIN  DECLARE @statement nvarchar(50)print 'dropping databse: '+@databaseNameexec('use masteralter database '+@databaseName+' set single_user with rollback immediatedrop database '+@databaseName)set@databaseCount=@databaseCount+1    FETCH NEXT FROM db_cursor INTO @databasename   END  print 'dropped databse count: '+CONVERT(VARCHAR(12),@databaseCount )CLOSE db_cursor  DEALLOCATE db_cursor

方法2：

declare @dbToDelete table(name varchar(50))declare @databaseName varchar(100)insert into @dbToDelete values('ABC')insert into @dbToDelete values('DEF')insert into @dbToDelete values('GH')insert into @dbToDelete select name from Master..SysDatabases where name like 'ABC%'while exists(select name from @dbToDelete)beginselect top 1 @databaseName=name from @dbToDeleteif exists(select * from sys.databases where name = @databaseName)beginprint 'dropping databse: '+@databaseNameexec('use masteralter database '+@databaseName+' set single_user with rollback immediatedrop database '+@databaseName)enddelete from @dbToDelete where name = @databaseNameend