Modifying ntext, text, or image Values

You can modify ntext, text, or image values by:

• Using a database API such as ADO, OLE DB, or ODBC to execute an UPDATE or INSERT statement with a program variable bound to a parameter marker for the ntext, text, or image column. Then call the appropriate database API functions to send long data to the database one block at a time. DB-Library supports the same functionality with its text and image functions.
• Using the WRITETEXT statement to rewrite the entire data value for the column.

  For example, this query changes the contents of the pr_info column for New Moon Books:

  USE pubs

  sp_dboption 'pubs', 'select into/bulkcopy', 'true'

  DECLARE @ptrval varbinary(16)

  SELECT @ptrval = TEXTPTR(pr_info)

  FROM pub_info pr INNER JOIN publishers p

  ON p.pub_id = pr.pub_id

  AND p.pub_name = 'New Moon Books'

  WRITETEXT pub_info.pr_info @ptrval 'New Moon Books (NMB) '

  sp_dboption 'pubs', 'select into/bulkcopy', 'true'

    

• Use the UPDATETEXT statement to update specific blocks of an ntext, text, or image column.

  For example, this query replaces the eighty-eighth character in the text column for New Moon Books (the second letter o in Moon) with the letter z:

  USE pubs

  sp_dboption 'pubs', 'select into/bulkcopy', 'true'

  DECLARE @ptrval varbinary(16)

  SELECT @ptrval = TEXTPTR(pr_info)

  FROM pub_info pr INNER JOIN publishers p

  ON p.pub_id = pr.pub_id

  AND p.pub_name = 'New Moon Books'

  UPDATETEXT pub_info.pr_info @ptrval 88 1 'z'

  sp_dboption 'pubs', 'select into/bulkcopy', 'false'

    

See Also