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Select SQL works intermittently
Message
De
01/09/1999 08:37:23
 
 
Information générale
Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Divers
Thread ID:
00260063
Message ID:
00260094
Vues:
19
Thanks. That has solved the problem, but do you have any idea why the nested joins would work sometimes and not others?


>Start by un-nesting the JOINs.
>
>SELECT Subjects.subjcode, Subjects.subjname, Attendnc.passed,;
>     Attendnc.att_part,Attendnc.absent, Attendnc.rpl,;
>     Attendnc.concldate, SPACE(60) AS lect_name, Attendnc.withdrawn,;
>     Attendnc.completed, Subjects.subject_id, Attendnc.enrol_id,;
>     Enrolmts.su_stdate, Attendnc.memb_num, Attendnc.lect_num;
>     FROM attendnc ;
>        INNER JOIN subjects ;
>          ON Attendnc.subject_id=Subjects.subject_id;
>        INNER JOIN enrolmts;
>          ON Attendnc.enrol_id=Enrolmts.enrol_id;
>     WHERE Attendnc.course_id=CF.course_id .AND.;
>           Attendnc.memb_num=Stu2.memb_num .AND.;
>           ATTENDNC.ENROL_ID=CF.ENROL_ID .AND. &ATT_COND.;
>     ORDER BY Subjects.subjcode, Subjects.subject_id ;
>     INTO CURSOR ATTTMP
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