Sarp,

The standard string delimiter in Sql Server is a single quote. The double quote can or cannot be used based on the SET QUOTED_IDENTIFIER setting. See BOL for details. I would recomend always use a single quote. You've to double it in the string as shown below.

EXECUTE ('update mal set ' + @xdepo + ' = ' + @xmiktar + 
  ' where malno = ''' + @xmalno + '''')

To get faster and better answers:
- Give your posts proper title. I don't see what your message has to do with 'field check'.
- The 'RE:' prefix is used to indicate a reply.
- Use < pre > tag to make your code more readable in the message.

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