从整个数据库中查找和替换列值

Posted 2023-03-23

【中文标题】从整个数据库中查找和替换列值

【英文标题】：Find and Replace Column value from Over all Database

【发布时间】：2020-01-14 07:50:36

【问题描述】：

我需要一个查询来找出整个数据库表中的一列值并需要替换它

例如：从下面的屏幕截图中，两个表都包含 'CompanyID' 列包含 36 位字符，我需要从整个数据库中找出相同的字符并替换为其他 36 位字符

.

【问题讨论】：

我们很乐意提供帮助，关键字是帮助 - 不是为您做这一切。因此，请向我们展示您的尝试以及您遇到的问题。

让它变得简单，并有可能为您提供帮助：minimal reproducible example。

Why not to use images of code

【参考方案1】：

我在某个地方看到了这个，我试过了，它奏效了。你可以试试看

DECLARE @stringToFind VARCHAR(100) 
DECLARE @stringToReplace VARCHAR(100) 
DECLARE @schema sysname 
DECLARE @table sysname 
DECLARE @count INT 
DECLARE @sqlCommand VARCHAR(8000) 
DECLARE @where VARCHAR(8000) 
DECLARE @columnName sysname 
DECLARE @object_id INT 

SET @stringToFind = 'Apple' ---- what you want to replace
SET @stringToReplace = 'mango' ---- what you want to replace it with

DECLARE TAB_CURSOR CURSOR  FOR 
SELECT   B.NAME      AS SCHEMANAME, 
         A.NAME      AS TABLENAME, 
         A.OBJECT_ID 
FROM     sys.objects A 
         INNER JOIN sys.schemas B 
           ON A.SCHEMA_ID = B.SCHEMA_ID 
WHERE    TYPE = 'U' 
ORDER BY 1 

OPEN TAB_CURSOR 

FETCH NEXT FROM TAB_CURSOR 
INTO @schema, 
     @table, 
     @object_id 

WHILE @@FETCH_STATUS = 0 
  BEGIN 
    DECLARE COL_CURSOR CURSOR FOR 
    SELECT A.NAME 
    FROM   sys.columns A 
           INNER JOIN sys.types B 
             ON A.SYSTEM_TYPE_ID = B.SYSTEM_TYPE_ID 
    WHERE  OBJECT_ID = @object_id 
           AND IS_COMPUTED = 0 
           AND B.NAME IN ('char','nchar','nvarchar','varchar','text','ntext') 

    OPEN COL_CURSOR 

    FETCH NEXT FROM COL_CURSOR 
    INTO @columnName 

    WHILE @@FETCH_STATUS = 0 
      BEGIN 
        SET @sqlCommand = 'UPDATE ' + @schema + '.' + @table + ' SET [' + @columnName 
                           + '] = REPLACE(convert(nvarchar(max),[' + @columnName + ']),''' 
                           + @stringToFind + ''',''' + @stringToReplace + ''')' 

        SET @where = ' WHERE [' + @columnName + '] LIKE ''%' + @stringToFind + '%''' 

        EXEC( @sqlCommand + @where) 

        SET @count = @@ROWCOUNT 

        IF @count > 0 
          BEGIN 
            PRINT @sqlCommand + @where 
            PRINT 'Updated: ' + CONVERT(VARCHAR(10),@count) 
            PRINT '----------------------------------------------------' 
          END 

        FETCH NEXT FROM COL_CURSOR 
        INTO @columnName 
      END 

    CLOSE COL_CURSOR 
    DEALLOCATE COL_CURSOR 

    FETCH NEXT FROM TAB_CURSOR 
    INTO @schema, 
         @table, 
         @object_id 
  END 

CLOSE TAB_CURSOR 
DEALLOCATE TAB_CURSOR