Re: LEFT joins

From: Date: Thu, 20 Jan 2005 20:12:03 +0000
Subject: Re: LEFT joins
References: 1 2 3 4 5 6 7 8 9  Groups: php.db 
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OR.... SELECT b.fldName,
        b.fldEmail,
        b.fldCountryCode,
        d.fldCode as FCode,
        b.fldMobile,
        a.fldTime as Time,
        c.fldUsername as Username
FROM tblSubscribersChoices a LEFT JOIN tblUser c ON c.fldClientID = a.fldChoice LEFT JOIN tblSubscribers b ON b.fldID = a.fldClientID LEFT JOIN tc_countries d ON d.fldCode = b.fldCountryCode ORDER BY Username ASC
and if that works but doesn't give you repeat records try adding the DISTINCT keyword after SELECT. <snip>
Why are you so intrested in LEFT JOIN? I cn't help much since i don't
I'm not but his original query used JIONs and a LEFT JOIN is (IMHO) the easiest to understand. I didn't have the presence of mind to rewrite the query using a simple WHERE clause - hope your tip helps him. btw: can anyone say if the LEFT JOIN or the alternative WHERE statement (in general?) is faster?
know the schema of the db and i can't see clear the meaning of the tables in the query. Anyway try this: <SQL> SELECT b.fldName,
         b.fldEmail,
         b.fldCountryCode,
         d.fldCode as FCode,
         b.fldMobile,
         a.fldTime as Time,
         c.fldUsername as Username
FROM tblSubscribersChoices a, tblUser c, tblSubscribers b,
    tc_countries d
WHERE c.fldClientID = a.fldChoice AND b.fldID = a.fldClientID AND
    d.fldCode = b.fldCountryCode
ORDER BY Username ASC </SQL> Bye


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