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Proper syntax when using UNION
Message
De
24/01/2002 12:49:13
Cetin Basoz
Engineerica Inc.
Izmir, Turquie
 
 
À
23/01/2002 17:57:25
Information générale
Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Divers
Thread ID:
00609414
Message ID:
00609880
Vues:
16
>I found a situation I can't explain. I have the following SQL:
>
>
>SELECT NOCLIENT,NOCAT,NUMERO,NOMEMBER,NOPARENT,NOTHREAD,ADDDATE,ADDHEURE,TITLE,.T. AS FLAG,1;
> FROM THREAD WHERE NoClient=5 AND NUMERO>=600000;
>UNION SELECT NOCLIENT,NOCAT,NUMERO,NOMEMBER,NOPARENT,NOTHREAD,ADDDATE,ADDHEURE,TITLE,.T. AS FLAG,0;
> FROM THREAD WHERE NoClient<>5 AND NUMERO>=600000;
> ORDER BY 11 DESCENDING,1,2,6,5 INTO CURSOR TEMP READWRITE
>
>
>The only way to make that work is to use an ORDER BY clause with numeric references. As soon as I put the UNION clause in it, I am forced to use numeric references for the SQL. Why is that?

Michel,
Would this be an alternative solution ?
SELECT distinct NOCLIENT,NOCAT,NUMERO,NOMEMBER,NOPARENT,;
  NOTHREAD,ADDDATE,ADDHEURE,TITLE,.T. AS FLAG,iif(NoClient=5,1,0) as myExp ;
 FROM THREAD WHERE NUMERO>=600000 ;
 ORDER BY 11 DESCENDING,1,2,6,5 INTO CURSOR TEMP READWRITE
Cetin
Çetin Basöz

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