narasimharao_koganti
New User
Joined: 26 Apr 2005
Posts: 11
Location: pune
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hi,
null indicates the absence of date in the column of the table. If u specify while declaring the table as "not null", means no null values will be allowed in the table,and it will take default values.
The main advantage of the null is to identify whether the column contains any value or not. |
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