Question

我正在尝试更改一个特定值，该值与其列名或表没有任何关系。

例如，它可以出现在：

column `name` in the table `users`

还有：

column `hi` in the table `jokes`

还有更多未知的地方。如何在我的数据库中的所有sql数据上运行循环来更改它？

我正在使用PHPMyAdmin

Answer 1

正如你所说的PHPMyAdmin我想你正在使用MySQL。

请参阅：

还有一个PHP脚本可以在以下位置执行此操作：

Search and Replace text in whole MySQL database

Answer 2

对于SQL server 2000：我写了这个脚本

-- full search and replace version sql server 2000
SET NOCOUNT ON

DECLARE @columnname varchar(255), @tablename varchar(255), @sql varchar(8000), @oldvalue varchar(1000), @newvalue varchar(1000)

SET @oldvalue = 'OldText' -- text to replace
SET @newvalue = 'NewText'  -- text to replace by

DECLARE table_cursor CURSOR FOR
select name from sysobjects where xtype='U' AND [name] LIKE 'MyTablePrefix_%' -- your table prefix
OPEN table_cursor

FETCH NEXT FROM table_cursor
INTO @tablename

WHILE @@FETCH_STATUS = 0
BEGIN

PRINT 'Updating Table: ' + @tablename + '...'

DECLARE column_cursor CURSOR FOR
SELECT     syscolumns.name AS column_name
FROM         sysobjects INNER JOIN
                      syscolumns ON sysobjects.id = syscolumns.id INNER JOIN
                      systypes ON syscolumns.xtype = systypes.xtype
WHERE     (sysobjects.xtype = 'U')
AND       systypes.[name] IN ('varchar','nvarchar','text','ntext')
AND       sysobjects.name =  @tablename
ORDER BY sysobjects.name, syscolumns.colid

OPEN column_cursor
FETCH NEXT FROM column_cursor INTO @columnname

WHILE @@FETCH_STATUS = 0
BEGIN

PRINT 'Updating Column: ' + @columnname + '...'

SET @SQL = 'UPDATE ' + @tablename
SET @SQL = @SQL + ' SET ' + @columnname + ' = Replace(CAST(' + @columnname + ' AS nvarchar(4000)),'''+ @oldvalue + ''',''' + @newvalue + ''')'
--PRINT @sql
EXECUTE(@SQL)

FETCH NEXT FROM column_cursor INTO @columnname
END

CLOSE column_cursor
DEALLOCATE column_cursor

FETCH NEXT FROM table_cursor
INTO @tablename

END
CLOSE table_cursor
DEALLOCATE table_cursor

在夜间运行它，因为在中型到大型数据库上运行需要很长时间......

SQL替换数据库中的所有值，无论列和表

2 个答案: