Gene,
Have you tried bracketing the statement off:

      where;
       (cwkt.clcode=ctwc.clcode) ;
        and (cwkt.wccode=ctwc.wccode) ;
        and( cwkt.trndate between ctwc.validfr and ctwc.validto);

Dave
-----Original Message-----
From: ProFox [mailto:profox-boun...@leafe.com] On Behalf Of Gene Wirchenko
Sent: 08 August 2017 01:36
To: ProFox Email List <profox@leafe.com>
Subject: SQL Error

Hello:

      The following statement throws "SQL: Error correlating fields.":

    select *;
    from cwkt;
    where;
     funccode="TW" and trndate>={^2017.07.01} and;
     exists;
      (;
      select .t. from ctwc;
      where;
       cwkt.clcode=ctwc.clcode and cwkt.wccode=ctwc.wccode and;
       cwkt.trndate between ctwc.validfr and ctwc.validto;
      );
    order by clcode,wonbr,trndate

     This statement works:

    select *;
    from cwkt;
    where;
     funccode="TW" and trndate>={^2017.07.01} and;
     exists;
      (;
      select .t. from ctwc;
      where;
       cwkt.clcode=ctwc.clcode and cwkt.wccode=ctwc.wccode and;
       cwkt.trndate>=ctwc.validfr and cwkt.trndate<=ctwc.validto;
      );
    order by clcode,wonbr,trndate

      The only difference is the second line of the nested select's where 
expression.  The first uses between, and the second uses >= and <=.

      What am I missing?

Sincerely,

Gene Wirchenko


[excessive quoting removed by server]

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