Change ownership – SQL server

DB TAbLES
=========
DECLARE @old sysname, @new sysname, @sql varchar(1000)
SELECT
  @old = ‘oldOwner_CHANGE_THIS’
  , @new = ‘dbo’
  , @sql = ‘
  IF EXISTS (SELECT NULL FROM INFORMATION_SCHEMA.TABLES
  WHERE
      QUOTENAME(TABLE_SCHEMA)+”.”+QUOTENAME(TABLE_NAME) = ”?”
      AND TABLE_SCHEMA = ”’ + @old + ”’
  )
  EXECUTE sp_changeobjectowner ”?”, ”’ + @new + ””
EXECUTE sp_MSforeachtable @sql
STORED PROCEDURES
=================
DECLARE @old sysname, @new sysname, @sql varchar(1000)
SELECT
@old [...]