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How to use SQL Select UNION with TOP
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Information générale
Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Divers
Thread ID:
01303352
Message ID:
01303386
Vues:
9
>>>Check this thread Re: Select 3 records Thread #1301530
>>>
>>>I'm thinking there may be a problem with using ORDER BY clause in 2 different parts of UNION.
>>
>>Thank you for pointing to the other thread. The TOP requires to have ORDER BY but maybe I only need it in the second SQL Select of the Union. I will try it.
>
>select PK from table inner join (select TOP 50 * from MyTable where PK_VAL > nVar Order by PK_VAL) TopSQL on ... ;
>UNION ALL ;
>select TOP 50 * from MyTable where PK_VAL < nVar Order by PK_VAL DESC
>
>Would this idea work too?

I will try and compare with Sergey's approach. Thank you.
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