Question

I am currently experimenting with using nested select statements but my subqueries are generating NULL values. What am I doing wrong?

SELECT filmid,datetime,title,description,
       (
          SELECT name 
          FROM fec_client 
          WHERE filmid = 'fec_film.filmid'
       ),
       (
          SELECT rating_motivation 
          FROM fec_rating_report 
          WHERE filmid = 'fec_film.filmid'
       ) 
FROM fec_film 
ORDER BY datetime DESC

Answer 1

remove the quotes, otherwise you are not comparing to the values in the SQL but to strings

SELECT filmid, datetime, title, description, 
    ( SELECT name FROM fec_client WHERE filmid = fec_film.filmid ) AS name,
    ( SELECT rating_motivation FROM fec_rating_report WHERE filmid = fec_film.filmid ) AS rating   
FROM fec_film ORDER BY datetime DESC

p.s. you can also name those columns using the ‘AS’ keyword