修改一批數據、無法斷定存在於哪個表中、
大體情況如下：
odata列爲舊數據、需要修改的數據
ndata列爲新數據、更新後的數據
需要將全庫所有內容爲odata列的數據更新爲ndata列
無法斷定具體哪張表存在相同數據、
創建存儲過程查找需要修改的字段
creat PROCEDURE [dbo].[proc_uptmp_ywsj]
AS
BEGIN
SET NOCOUNT ON;
--變量定義
--計算過程執行時長
DECLARE @starttime DATETIME;
DECLARE @totaltime INT;
--流程控制(成功失敗)
DECLARE @Result INT;
--執行影響行數
DECLARE @ROW INT;
--錯誤日誌
DECLARE @ErrorMessage VARCHAR(1000);
--變量賦值
SET @starttime = GETDATE();
SET @Result = 0;
--創建臨時表
CREATE TABLE #tmp_pdchg_z
(
table_name VARCHAR(100) ,
filed_name VARCHAR(100)
);
--全庫篩選可能存在需修改數據的列、數據類型等條件根據實際情況選擇
INSERT INTO #tmp_pdchg_z
( table_name ,
filed_name
)
SELECT a.table_name ,
a.filed_name
FROM ( SELECT d.name table_name ,
a.colorder 字段序號 ,
a.name filed_name ,
( CASE WHEN COLUMNPROPERTY(a.id, a.name,
'IsIdentity') = 1
THEN '√'
ELSE ''
END ) 標識 ,
( 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 ) 主鍵 ,
b.name 類型 ,
a.length 佔用字節數 ,
COLUMNPROPERTY(a.id, a.name, 'PRECISION') AS 長度 ,
ISNULL(COLUMNPROPERTY(a.id, a.name,
'Scale'), 0) AS 小數位數 ,
( CASE WHEN a.isnullable = 1 THEN '√'
ELSE ''
END ) 允許空 ,
ISNULL(e.text, '') 默認值 ,
ISNULL(g.[value], ' ') AS [說明]
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.主鍵 =''
AND a.默認值 =''
AND a.類型 ='varchar'
OR a.類型 = '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) );
--開啓事務
-- BEGIN TRAN;
-- BEGIN TRY
-----遊標循環判斷可能存在需修改數據的列是否存在需修改數據
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
--計算邏輯
BEGIN
INSERT INTO @T
EXEC ( @tb_f_yj
);
IF EXISTS ( SELECT 1
FROM @T )
---將實際存在需修改數據的表名、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;
--計算總時長
SET @totaltime = DATEDIFF(SECOND, @starttime, GETDATE());
--END TRY
--BEGIN CATCH
-- IF @@TRANCOUNT > 0
-- BEGIN
-- ROLLBACK TRAN;
-- SELECT @ErrorMessage = '操作發生異常:'
-- + 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;
--刪除臨時表
IF EXISTS ( SELECT *
FROM tempdb..sysobjects
WHERE id = OBJECT_ID('tempdb..#tmp_aa') )
BEGIN
DROP TABLE #tmp_aa;
END;
--記錄日誌
--INSERT INTO tb_SYSLOGS(Logger,Logtime,LogIP,Logname,LogTotalTime,LevelCode,Message,LogSQL)
-- SELECT 'Templete' ,
-- GETDATE() ,
-- '::1' ,
-- 'sa' ,
-- @totaltime ,
-- 'proc_uptmp_pdchg' ,
-- '' ,
-- '影響行數' + CAST(@ROW AS VARCHAR(10)) + ',' + @ErrorMessage;
END;
備註: 其中
a.主鍵 =”
AND a.默認值 =”
AND a.類型 =’varchar’
OR a.類型 = ‘nvarchar’
根據實際情況篩選
創建此過程中需要用到的表
------存放需修改數據的表
CREATE TABLE [dbo].[tmp_ywsj](
odata [varchar](100) NULL,
ndata [varchar](100) NULL
) ON [PRIMARY] ;
-----創建表用於存放數據庫中實際需修改的列
CREATE TABLE uptmp_ywsj
(table_name VARCHAR(100),
filed_name VARCHAR(100));
執行存儲過程
EXEC proc_uptmp_ywsj 實際需修改的列會寫入uptmp_ywsj表中
根據uptmp_ywsj 生成update腳本
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執行查詢結果