Hi,
Check this...
DECLARE @Command NVARCHAR(MAX)
SET @Command = ' UPDATE [NetDB].[dbo].[Table4]
SET [DA_ArticleDetails] = REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(DA_ArticleDetails,''||$|| ||$||'','' ''),''||$||'','' ''),'' '',''<>''),''><'',''''),''<>'','' '') '
PRINT(@Command)
Hope this will help you.
Cheers