Re: [INTERFACES]- SELECT statement - Mailing list pgsql-interfaces

On Thu, Feb 25, 1999 at 09:26:50AM -0500, Margarita Barvinok wrote:
> 1)
>  How can I realize this query in C-Embedded SQL?
>
> SELECT MAX (score)
>   FROM report
>   WHERE uname = 'xxxxxxx'
>   AND exam_id IN
>       ( SELECT exam_id
>         FROM exam
>         WHERE name = 'yyyy'
>       )

exec sql declare C cursor for  SELECT MAX (score)
   FROM report
   WHERE uname = 'xxxxxxx'
   AND exam_id IN
       ( SELECT exam_id
         FROM exam
         WHERE name = 'yyyy'
       );

exec sql fetch in C into :score;

> I used DECLARE CURSOR and FETCH for second SELECT statement.
> But I don't know how to use WHERE ... IN clause.

This is one statement. The subselect is handled by the backend.

Michael
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