修改一批数据、无法断定存在于哪个表中、
大体情况如下：
odata列为旧数据、需要修改的数据
ndata列为新数据、更新后的数据
需要将全库所有内容为odata列的数据更新为ndata列
无法断定具体哪张表存在相同数据、
创建存储过程查找需要修改的字段
creat PROCEDURE [dbo].[proc_uptmp_ywsj]
AS
BEGIN
SET NOCOUNT ON;
--变量定义
--计算过程执行时长
DECLARE @starttime DATETIME;
DECLARE @totaltime INT;
--流程控制(成功失败)
DECLARE @Result INT;
--执行影响行数
DECLARE @ROW INT;
--错误日志
DECLARE @ErrorMessage VARCHAR(1000);
--变量赋值
SET @starttime = GETDATE();
SET @Result = 0;
--创建临时表
CREATE TABLE #tmp_pdchg_z
(
table_name VARCHAR(100) ,
filed_name VARCHAR(100)
);
--全库筛选可能存在需修改数据的列、数据类型等条件根据实际情况选择
INSERT INTO #tmp_pdchg_z
( table_name ,
filed_name
)
SELECT a.table_name ,
a.filed_name
FROM ( SELECT d.name table_name ,
a.colorder 字段序号 ,
a.name filed_name ,
( CASE WHEN COLUMNPROPERTY(a.id, a.name,
'IsIdentity') = 1
THEN '√'
ELSE ''
END ) 标识 ,
( CASE WHEN ( SELECT COUNT(*)
FROM sysobjects
WHERE ( name IN (
SELECT
name
FROM
sysindexes
WHERE
( id = a.id )
AND ( indid IN (
SELECT
indid
FROM
sysindexkeys
WHERE
( id = a.id )
AND ( colid IN (
SELECT
colid
FROM
syscolumns
WHERE
( id = a.id )
AND ( name = a.name ) ) ) ) ) ) )
AND ( xtype = 'PK' )
) > 0 THEN '√'
ELSE ''
END ) 主键 ,
b.name 类型 ,
a.length 占用字节数 ,
COLUMNPROPERTY(a.id, a.name, 'PRECISION') AS 长度 ,
ISNULL(COLUMNPROPERTY(a.id, a.name,
'Scale'), 0) AS 小数位数 ,
( CASE WHEN a.isnullable = 1 THEN '√'
ELSE ''
END ) 允许空 ,
ISNULL(e.text, '') 默认值 ,
ISNULL(g.[value], ' ') AS [说明]
FROM syscolumns a
LEFT JOIN systypes b ON a.xtype = b.xusertype
INNER JOIN sysobjects d ON a.id = d.id
AND d.xtype = 'U'
AND d.name <> 'dtproperties'
LEFT JOIN syscomments e ON a.cdefault = e.id
LEFT JOIN sys.extended_properties g ON a.id = g.major_id
AND a.colid = g.minor_id
LEFT JOIN sys.extended_properties f ON d.id = f.class
AND f.minor_id = 0
WHERE b.name IS NOT NULL
AND d.name IN (
SELECT name
FROM sysobjects
WHERE xtype = 'U'
AND name NOT LIKE '%API%'
AND name NOT LIKE '%Workflow%'
AND name NOT LIKE '%Membership%'
AND name NOT LIKE '%LOG%' )
) a
WHERE a.主键 =''
AND a.默认值 =''
AND a.类型 ='varchar'
OR a.类型 = 'nvarchar';
--SELECT *
--FROM #tmp_pdchg_z
DECLARE @tb_f_yj VARCHAR(500);
DECLARE @table_name VARCHAR(50);
DECLARE @filed_name VARCHAR(50);
DECLARE @T TABLE ( cc VARCHAR(20) );
--开启事务
-- BEGIN TRAN;
-- BEGIN TRY
-----游标循环判断可能存在需修改数据的列是否存在需修改数据
DECLARE tb_f_cursor CURSOR
FOR
SELECT 'SELECT top 1 ' + filed_name + ' FROM ' + table_name
+ ' a WHERE EXISTS (SELECT 1 FROM tmp_ywsj WHERE odata=a.'
+ filed_name + ' );' ,
table_name ,
filed_name
FROM #tmp_pdchg_z;
OPEN tb_f_cursor;
FETCH NEXT FROM tb_f_cursor INTO @tb_f_yj, @table_name,
@filed_name;
WHILE @@fetch_status = 0
--计算逻辑
BEGIN
INSERT INTO @T
EXEC ( @tb_f_yj
);
IF EXISTS ( SELECT 1
FROM @T )
---将实际存在需修改数据的表名、列名插入表中
BEGIN
INSERT INTO uptmp_ywsj
VALUES ( @table_name, @filed_name );
END;
DELETE FROM @T;
FETCH NEXT FROM tb_f_cursor INTO @tb_f_yj, @table_name,@filed_name;
END;
CLOSE tb_f_cursor;
DEALLOCATE tb_f_cursor;
--计算总时长
SET @totaltime = DATEDIFF(SECOND, @starttime, GETDATE());
--END TRY
--BEGIN CATCH
-- IF @@TRANCOUNT > 0
-- BEGIN
-- ROLLBACK TRAN;
-- SELECT @ErrorMessage = '操作发生异常:'
-- + CAST(ERROR_NUMBER() AS VARCHAR) + ','
-- + ERROR_MESSAGE() ,
-- @Result = -1;
-- END;
--END CATCH;
--IF @@TRANCOUNT > 0
-- AND @Result = 0
-- BEGIN
-- COMMIT TRAN;
-- END;
--IF @@TRANCOUNT > 0
-- AND @Result <> 0
-- BEGIN
-- ROLLBACK TRAN;
-- END;
--SELECT @b AS b;
--删除临时表
IF EXISTS ( SELECT *
FROM tempdb..sysobjects
WHERE id = OBJECT_ID('tempdb..#tmp_aa') )
BEGIN
DROP TABLE #tmp_aa;
END;
--记录日志
--INSERT INTO tb_SYSLOGS(Logger,Logtime,LogIP,Logname,LogTotalTime,LevelCode,Message,LogSQL)
-- SELECT 'Templete' ,
-- GETDATE() ,
-- '::1' ,
-- 'sa' ,
-- @totaltime ,
-- 'proc_uptmp_pdchg' ,
-- '' ,
-- '影响行数' + CAST(@ROW AS VARCHAR(10)) + ',' + @ErrorMessage;
END;
备注: 其中
a.主键 =”
AND a.默认值 =”
AND a.类型 =’varchar’
OR a.类型 = ‘nvarchar’
根据实际情况筛选
创建此过程中需要用到的表
------存放需修改数据的表
CREATE TABLE [dbo].[tmp_ywsj](
odata [varchar](100) NULL,
ndata [varchar](100) NULL
) ON [PRIMARY] ;
-----创建表用于存放数据库中实际需修改的列
CREATE TABLE uptmp_ywsj
(table_name VARCHAR(100),
filed_name VARCHAR(100));
执行存储过程
EXEC proc_uptmp_ywsj 实际需修改的列会写入uptmp_ywsj表中
根据uptmp_ywsj 生成update脚本
SELECT
'CREATE NONCLUSTERED INDEX [NON-'+table_name+'_'+filed_name+'] ON '+table_name+' ('+filed_name+');',
'UPDATE SET A.'+filed_name+' = B.ndata, a.UpdatedAt = GETDATE() FROM dbo.'+table_name+' A, dbo.tmp_ywsj B WHERE B.odata = a.'+filed_name+';' ,
'DROP INDEX [NON-'+table_name+'_'+filed_name+'] ON dbo.'+table_name+';'
FROM uptmp_ywsj执行查询结果