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beatkeeper25
Starting Member
27 Posts |
 Posted - 2013-08-06 : 15:41:01
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| Can someone translate what this line is doing? AND ISNULL(a.completiondate,0)<ISNULL(b.completiondate,0)what is the purpose of the ,0 ? |
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tkizer
Almighty SQL Goddess
38200 Posts |
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visakh16
Very Important crosS Applying yaK Herder
52326 Posts |
Posted - 2013-08-07 : 00:55:37
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basically the purpose of this is to handle NULL values as well. If you just use it like belowa.completiondate < b.completiondate it will cause the cases where one of the column values is NULL to be ignored as operators like <,> etc will ignore NULL under default conditions (ANSI NULL settings) in SQL Server------------------------------------------------------------------------------------------------------SQL Server MVPhttp://visakhm.blogspot.com/https://www.facebook.com/VmBlogs |
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