Crystal Reports Isnull in SQL expression

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Topic: Isnull in SQL expression

Author	Message
$$Dr Newbie Joined: 18 Feb 2016 Online Status: Offline Posts: 16	Topic: Isnull in SQL expression Posted: 02 May 2019 at 5:50am
	What does this statement mean when included in a record selection statement? {fn IFNULL(POHD.Job,'')} the data field could be different in similar expressions.
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DBlank Moderator Joined: 19 Dec 2008 Online Status: Offline Posts: 9053	Posted: 02 May 2019 at 6:16am
	not sure what your datasource is but the IFNULL should,I think, be basically the same as SQL's ISNULL() which returns a default value for a null field so if your table is LETTER AGE A 1 B NULL C 4 and you select ISNULL(table.age,0) it returns 1 for row A, 0 (instead of null) for row B and 4 for row C Edited by DBlank - 02 May 2019 at 6:18am
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$$Dr Newbie Joined: 18 Feb 2016 Online Status: Offline Posts: 16	Posted: 02 May 2019 at 6:31am
	Thanks, this statement was preventing a report from returning results in one database company vs another with results being displayed in old company but not new. (recent merge of 4 companies into a single company.)
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DBlank Moderator Joined: 19 Dec 2008 Online Status: Offline Posts: 9053	Posted: 02 May 2019 at 6:50am
	it might be a custom function in that DB
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lockwelle Moderator Joined: 21 Dec 2007 Online Status: Offline Posts: 4372	Posted: 02 May 2019 at 10:41am
	looking online...ifnull is mysql's nullif as DBlank alluded to.
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