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@cemerson
Created November 11, 2021 11:30
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SQL replace all instances of string in all tables of entire database
/* ------------------------------------------------------- /
TITLE: SQL Server Find and Replace Values in All
Tables and All Text Columns
SOURCE: https://www.mssqltips.com/sqlservertip/1555/sql-server-find-and-replace-values-in-all-tables-and-all-text-columns/
/ ------------------------------------------------------- */
USE MyDatabaseNameHere
BEGIN TRANSACTION
SET NOCOUNT ON
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 = 'oldstring'
SET @stringToReplace = 'newstring!!'
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
ROLLBACK TRANSACTION
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