Difference between revisions of "SET NULLDISPLAY"
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==See Also== | ==See Also== | ||
| − | [[ALTER TABLE]], [[CREATE TABLE]], [[EMPTY()]], [[INSERT]], [[ISBLANK()]], [[ISNULL()]], [[NVL()]], [[SET NULL]], [[SET SQL]] | + | [[ALTER TABLE]], [[COALESCE()]], [[CREATE TABLE]], [[EMPTY()]], [[IFNULL()]], [[INSERT]], [[ISBLANK()]], [[ISNULL()]], [[NVL()]], [[SET NULL]], [[SET SQL]] |
==Description== | ==Description== | ||
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[[Category:Set_Commands|NULLDISPLAY]] | [[Category:Set_Commands|NULLDISPLAY]] | ||
[[Category:SQL]] | [[Category:SQL]] | ||
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Latest revision as of 06:12, 15 April 2013
Contents
Purpose
To specify the text displayed for NULL values
Syntax
SET NULLDISPLAY TO [<expC>]
See Also
ALTER TABLE, COALESCE(), CREATE TABLE, EMPTY(), IFNULL(), INSERT, ISBLANK(), ISNULL(), NVL(), SET NULL, SET SQL
Description
The SET NULLDISPLAY command is used to specify the text displayed for NULL values. By default NULL values are displayed as .NULL.. The optional <expC> is used to specify alternative display text. If <expC> is omitted, then the display is reset to the default.
Example
set sql to vfp set null on set heading off CREATE TABLE nullon (firstname c(20), lastname c(20)) INSERT INTO nullon (lastname) VALUES ("Smith") list off .NULL. Smith set nulldisplay to "<null>" list off <null> Smith set nulldisplay to list off .NULL. Smith
