Not able to retreive null columns

• makjain

  SSC Enthusiast

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  March 28, 2009 at 2:16 am

  #207913

  Hi,

  I m trying to retrieve all rows based on one colunm i.e. imgdata whose property is varbinary(max) but m not getting any result. Query is as below:

  select * from tbl where imgdata = NULL

  There is one more query which i have put in Back up section.

• ChrisM@Work

  SSC Guru

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  March 28, 2009 at 3:39 am

  #967851

  SELECT * FROM tbl WHERE imgdata IS NULL

  NULL isn't equal to anything, hence the special operator.

  ^{“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw}

  For fast, accurate and documented assistance in answering your questions, please read this article.
  Understanding and using APPLY, (I) and (II) Paul White
  Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden

• makjain

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  March 28, 2009 at 4:02 am

  #967852

  ok thanks...!!