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SQL Check Constraint for an
Message
Information générale
Forum:
Visual FoxPro
Catégorie:
Client/serveur
Divers
Thread ID:
00950957
Message ID:
00951265
Vues:
9
><snip>
>>>
>>>
>>>And Not Empty(tablename.columnname)
>>>
>>>
>>
>>Look at the DATALENTH() function in SQL-DOL. Also if the field accepts null values you'd use IS NULL.
>
>George,
>
>Why would you use DATALENTH() function in this case when 'NOT LEN(tablename.columnname)=0' does the job?

Sergey,

LEN() only applies to strings. DATALENGTH() can be used on any type, including binary and image.
George

Ubi caritas et amor, deus ibi est
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