SQL SERVER回滚恢复误操作数据的实现方法

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在生产数据库做CURD操作时，可能会有执行某条语句误操作的情况发生，针对这个种情况有两点建议：
1、
在SQL SERVER上开启事务确认功能，当执行完语句后确认无误，再提交事务。（开启方法见附件图片）。
2、
新建存储过程，粘贴附件脚本。此存储过程执行后能够自动产生两个操作日志表，自动记录CRUD的所有操作。适用于提交事务后才发现错误的情况。只需要打开表UPDATE_LOG，粘贴RollbackupSQL里的语句执行即可恢复数据。
注意：1)如果表中有自增长的ID，所恢复数据的ID值是最大ID+1。
2)由于正常操作也会回写操作日志，注意及时清理日志表，或者在执行完后删掉新建的存储过程、触发器及表。
回滚脚本，执行后数据要记录的表名

CREATE PROCEDURE [dbo].[SP_UPDATE_LOG]
    @TABLENAME VARCHAR(50)
AS
BEGIN
    SET NOCOUNT ON;
    IF NOT EXISTS(SELECT * FROM sys.tables WHERE NAME = @TABLENAME AND TYPE = 'U' )
    BEGIN
        PRINT'ERROR：not exist table '+@TABLENAME
        RETURN
    END
    IF (@TABLENAME LIKE'BACKUP_%' OR @TABLENAME='UPDATE_LOG' )
    BEGIN
        --PRINT'ERROR：not exist table '+@TABLENAME
        RETURN
    END
    --================================判断是否存在 UPDATE_LOG 表============================
    IF NOT EXISTS(SELECT * FROM sys.tables WHERE NAME = 'UPDATE_LOG' AND TYPE = 'U')
        CREATE TABLE UPDATE_LOG
        (
            UpdateGUID VARCHAR(36),
            UpdateTime DATETIME,
            TableName varchar(20),
            UpdateType varchar(6),
            RollBackSQL varchar(MAX),
            ExecSQL VARCHAR(500)
        )
    --=================================判断是否存在 BACKUP_ 表================================
    IF NOT EXISTS(SELECT * FROM sys.tables WHERE NAME = 'BACKUP_'+@TABLENAME AND TYPE = 'U')
    BEGIN
        DECLARE test_Cursor CURSOR FOR
        SELECT COLUMN_NAME,DATA_TYPE,CHARACTER_MAXIMUM_LENGTH FROM INFORMATION_SCHEMA.columns
        WHERE TABLE_NAME=@TABLENAME
        OPEN test_Cursor
        DECLARE @SQLTB NVARCHAR(MAX)=''
        DECLARE @COLUMN_NAME NVARCHAR(50),@DATA_TYPE VARCHAR(20),@CHARACTER_MAXIMUM_LENGTH INT
        FETCH NEXT FROM test_Cursor INTO @COLUMN_NAME,@DATA_TYPE,@CHARACTER_MAXIMUM_LENGTH
        WHILE @@FETCH_STATUS=0
        BEGIN
            SET @SQLTB=@SQLTB+'['+@COLUMN_NAME+'] '+@DATA_TYPE+CASE ISNULL(@CHARACTER_MAXIMUM_LENGTH,0) WHEN 0 THEN '' WHEN -1 THEN '(MAX)' ELSE'('+CAST(@CHARACTER_MAXIMUM_LENGTH AS VARCHAR(10))+')' END+','
            FETCH NEXT FROM test_Cursor INTO @COLUMN_NAME,@DATA_TYPE,@CHARACTER_MAXIMUM_LENGTH
        END
        SET @SQLTB='CREATE TABLE BACKUP_'+@TABLENAME+' (UpdateGUID varchar(36),UpdateType Varchar(10),'+SUBSTRING(@SQLTB,1,LEN(@SQLTB)-1)+')'
        EXEC (@SQLTB)
        CLOSE test_Cursor
        DEALLOCATE test_Cursor
    END
    --======================================判断是否存在 UPDATE 触发器=========================
    IF NOT EXISTS(SELECT * FROM sys.objects WHERE NAME = 'tg_'+@TABLENAME+'_Update' AND TYPE = 'TR')
    BEGIN
        DECLARE @SQLTR NVARCHAR(MAX)
        SET @SQLTR='
CREATE TRIGGER tg_'+@TABLENAME+'_Update
    ON  '+@TABLENAME+'
    AFTER Update,Delete,Insert
AS
BEGIN 
    SET NOCOUNT ON;
    --==============================获取GUID==========================================
    DECLARE @NEWID VARCHAR(36)=NEWID()
    --===========================将删掉或新增的数据插入备份表=========================
    DECLARE @ROWCOUNT INT
    INSERT INTO [dbo].[BACKUP_'+@TABLENAME+']
    SELECT @NEWID,''DELETE'',* FROM deleted
    SET @ROWCOUNT=@@ROWCOUNT
    IF @ROWCOUNT>0
    BEGIN
        INSERT INTO [dbo].[BACKUP_'+@TABLENAME+']
        SELECT @NEWID,''INSERT'',* FROM inserted
    END
    ELSE
    BEGIN
        INSERT INTO [dbo].[BACKUP_'+@TABLENAME+']
        SELECT @NEWID,''INSERT'',* FROM inserted
        SET @ROWCOUNT=@@ROWCOUNT
    END
    --==============================记录日志和回滚操作的SQL===========================
    --******************生成插入语句用到的列名（需避开自增字段）********************
    DECLARE @COLUMN1 NVARCHAR(MAX)=''''
    SELECT @COLUMN1+='',[''+COLUMN_NAME+'']'' FROM INFORMATION_SCHEMA.columns
    WHERE TABLE_NAME='''+@TABLENAME+'''
    AND COLUMNPROPERTY(OBJECT_ID('''+@TABLENAME+'''),COLUMN_NAME,''IsIdentity'')<>1 --非自增字段
    SET @COLUMN1=SUBSTRING(@COLUMN1,2,LEN(@COLUMN1))
    --*******************动态定义变量、删除条件匹配的列********************
    DECLARE @DECLARE VARCHAR(MAX)='''',@INTODECLARE VARCHAR(MAX)='''',@WHERE VARCHAR(MAX)='''',@COLUMN2 VARCHAR(MAX)=''''
    SELECT @DECLARE+=''@''+COLUMN_NAME+'' ''+DATA_TYPE+CASE ISNULL(CAST(CHARACTER_OCTET_LENGTH AS VARCHAR(10)),'''') WHEN '''' THEN '','' WHEN ''-1'' THEN ''(MAX),'' ELSE ''(''+CAST(CHARACTER_OCTET_LENGTH AS VARCHAR(10))+''),'' END,
        @INTODECLARE+=''@''+COLUMN_NAME+'','',
        @COLUMN2+=''[''+COLUMN_NAME+''],'' ,
        @WHERE += ''ISNULL(''+ COLUMN_NAME+'','''''''')=ISNULL(@''+COLUMN_NAME+'','''''''') AND ''
    FROM INFORMATION_SCHEMA.columns
    WHERE TABLE_NAME='''+@TABLENAME+'''
    SET @DECLARE=LEFT(@DECLARE,LEN(@DECLARE)-1)
    SET @INTODECLARE=LEFT(@INTODECLARE,LEN(@INTODECLARE)-1)
    SET @COLUMN2=LEFT(@COLUMN2,LEN(@COLUMN2)-1)
    SET @WHERE= LEFT(@WHERE,LEN(@WHERE)-3)
    --*******************判断是否还原当前表的最近一次操作*******************         
    DECLARE @SQL_ISLAST VARCHAR(MAX)=''
    SET NOCOUNT ON
    DECLARE @maxdate datetime
    SELECT @maxdate=max(updatetime) FROM UPDATE_LOG WHERE TableName='''''+@TABLENAME+'''''
    IF NOT EXISTS(SELECT 1 FROM UPDATE_LOG WHERE UpdateTime=@maxdate AND UPDATEGUID=''''''+@NEWID+'''''')
    BEGIN
        DECLARE @MAXGUID VARCHAR(50)
        SELECT @MAXGUID=UPDATEGUID FROM UPDATE_LOG WHERE UpdateTime=@maxdate
        PRINT ''''此操作并非最近一次操作，请逐步还原,此表最近一次操作的GUID是：''''+@MAXGUID
        RETURN
    END
    ''
    --********************还原insert和update操作用到的SQL*******************
    DECLARE @SQL_DELETE VARCHAR(MAX)=''
    SET ROWCOUNT 1  --设定相同条件下只删除1行        
    DECLARE Cursor_ CURSOR FOR
    SELECT ''+@COLUMN2+'' FROM BACKUP_'+@TABLENAME+' WHERE UPDATEGUID= ''''''+@NEWID+'''''' AND UpdateType=''''INSERT''''
    OPEN Cursor_
    DECLARE ''+@DECLARE+''
    FETCH NEXT FROM Cursor_ INTO ''+@INTODECLARE+''
    WHILE @@FETCH_STATUS=0
    BEGIN                  
        DELETE FROM '+@TABLENAME+' WHERE ''+@WHERE+''
        FETCH NEXT FROM Cursor_ INTO ''+@INTODECLARE+''
    END
    CLOSE Cursor_
    DEALLOCATE Cursor_
    SET ROWCOUNT 0
    ''
    --*********************还原delete和update操作用到的SQL*******************
    DECLARE @SQL_INSERT VARCHAR(MAX)=''
    INSERT INTO '+@TABLENAME+' SELECT ''+@COLUMN1+'' FROM BACKUP_'+@TABLENAME+' WHERE UPDATEGUID=''''''+@NEWID+'''''' AND UpdateType=''''DELETE''''
    ''
    --*********************还原操作之后把备份表和log表的记录删掉*************
    DECLARE @SQL_DELGUID VARCHAR(MAX)=''
    DELETE FROM BACKUP_'+@TABLENAME+' WHERE  UPDATEGUID IN(SELECT UPDATEGUID FROM UPDATE_LOG WHERE UpdateTime>=@maxdate AND TableName='''''+@TABLENAME+''''')
    DELETE FROM UPDATE_LOG WHERE UpdateTime>=@maxdate AND TableName='''''+@TABLENAME+'''''
    PRINT ''''回滚操作执行成功，共恢复 ''+CAST(@ROWCOUNT AS VARCHAR(10))+'' 条记录''''
    SET NOCOUNT OFF
    ''
    --*********************执行还原操作的SQL**********************************
    DECLARE @EXECSQL VARCHAR(500)=''
    DECLARE @SQL VARCHAR(MAX)
    SELECT @SQL=ROLLBACKSQL FROM UPDATE_LOG WHERE UPDATEGUID=''''''+@NEWID+''''''  
    EXEC(@SQL) 
    ''
    --==============================判断执行的哪种操作方式=================================
    DECLARE @DoType VARCHAR(MAX)=''UPDATE''
    IF NOT EXISTS(SELECT 1 FROM deleted)
        SET @DoType=''INSERT''
    IF NOT EXISTS(SELECT 1 FROM inserted)
        SET @DoType=''DELETE''
    IF NOT EXISTS(SELECT 1 FROM deleted) AND  NOT EXISTS(SELECT 1 FROM inserted)
        RETURN
    IF @DoType=''UPDATE''
    BEGIN
        INSERT INTO [dbo].[UPDATE_LOG]
        SELECT @NEWID,GETDATE(),'''+@TABLENAME+''',''UPDATE'',@SQL_ISLAST+@SQL_DELETE+@SQL_INSERT+@SQL_DELGUID,@EXECSQL
        RETURN
    END
    IF @DoType=''DELETE''
    BEGIN
        INSERT INTO [dbo].[UPDATE_LOG]
        SELECT @NEWID,GETDATE(),'''+@TABLENAME+''',''DELETE'',@SQL_ISLAST+@SQL_INSERT+@SQL_DELGUID,@EXECSQL
        RETURN
    END
    IF @DoType=''INSERT''
    BEGIN
        INSERT INTO [dbo].[UPDATE_LOG]
        SELECT @NEWID,GETDATE(),'''+@TABLENAME+''',''INSERT'',@SQL_ISLAST+@SQL_DELETE+@SQL_DELGUID,@EXECSQL
        RETURN
    END
END
            '
        EXEC (@SQLTR)
    END
END

 

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关键词：回滚