Nous souhaitons obtenir le nombre annuel total d'entrées depuis 1979. Le résultat devra être trié par année.
Voici le code 4D correspondant à cette requête :
ARRAY INTEGER(aMovieYear;0)
ARRAY LONGINT(aSoldTickets;0)
C_LONGINT($MovieYear;$vCrtMovieYear;$i)
REDUCE SELECTION([MOVIES];0)
$MovieYear:=1979
QUERY([MOVIES];[MOVIES]Year_of_Movie>=$MovieYear)
ORDER BY([MOVIES];[MOVIES]Year_of_Movie;>)
$vCrtMovieYear:=0
$vInd:=Size of array(aMovieYear)
For($i;1;Records in selection([MOVIES]))
If([MOVIES]Year_of_Movie#$vCrtMovieYear)
$vCrtMovieYear:=[MOVIES]Year_of_Movie
$vInd:=$vInd+1
INSERT IN ARRAY(aMovieYear;$vInd;1)
aMovieYear{$vInd}:=$vCrtMovieYear
INSERT IN ARRAY(aSoldTickets;$vInd;1)
End if
aSoldTickets{$vInd}:=aSoldTickets{$vInd}+[MOVIES]Sold_Tickets
NEXT RECORD([MOVIES])
End for
ARRAY TEXT(aTitles;Taille tableau(aMovieYear))
ARRAY TEXT(aDirectors;Taille tableau(aMovieYear))
ARRAY TEXT(aMedias;Taille tableau(aMovieYear))
ARRAY LONGINT(aNrActors;Taille tableau(aMovieYear))
- En utilisant du code SQL :
ARRAY INTEGER(aMovieYear;0)
ARRAY LONGINT(aSoldTickets;0)
C_LONGINT($MovieYear)
REDUCE SELECTION([MOVIES];0)
$MovieYear:=1979
Begin SQL
SELECT Year_of_Movie, SUM(Sold_Tickets)
FROM MOVIES
WHERE Year_of_Movie >= :$MovieYear
GROUP BY Year_of_Movie
ORDER BY 1
INTO :aMovieYear, :aSoldTickets;
End SQL
ARRAY TEXT(aTitles;Taille tableau(aMovieYear))
ARRAY TEXT(aDirectors;Taille tableau(aMovieYear))
ARRAY TEXT(aMedias;Taille tableau(aMovieYear))
ARRAY LONGINT(aNrActors;Taille tableau(aMovieYear))
- En utilisant les commandes SQL génériques :
C_TEXT($tQueryTxt)
ARRAY LONGINT(aSoldTickets;0)
ARRAY INTEGER(aMovieYear;0)
C_LONGINT($MovieYear)
REDUCE SELECTION([MOVIES];0)
$MovieYear:=1979
SQL LOGIN(SQL_INTERNAL;"";"")
$tQueryTxt:=""
$tQueryTxt:=$tQueryTxt+"SELECT Year_of_Movie, SUM(Sold_Tickets)"
$tQueryTxt:=$tQueryTxt+" FROM MOVIES"
$tQueryTxt:=$tQueryTxt+" WHERE Year_of_Movie >= :$MovieYear"
$tQueryTxt:=$tQueryTxt+" GROUP BY Year_of_Movie"
$tQueryTxt:=$tQueryTxt+" ORDER BY 1"
SQL EXECUTE($tQueryTxt;aMovieYear;aSoldTickets)
SQL LOAD RECORD(SQL all records)
SQL LOGOUT
ARRAY TEXT(aTitles;Taille tableau(aMovieYear))
ARRAY TEXT(aDirectors;Taille tableau(aMovieYear))
ARRAY TEXT(aMedias;Taille tableau(aMovieYear))
ARRAY LONGINT(aNrActors;Taille tableau(aMovieYear))
- En utilisant la commande CHERCHER PAR SQL :
ARRAY LONGINT(aSoldTickets;0)
ARRAY INTEGER(aMovieYear;0)
C_LONGINT($MovieYear)
REDUCE SELECTION([MOVIES];0)
$MovieYear:=1979
QUERY BY SQL([MOVIES];"Year_of_Movie >= :$MovieYear")
ORDER BY([MOVIES];[MOVIES]Year_of_Movie;>)
$vCrtMovieYear:=0
$vInd:=Size of array(aMovieYear)
For($i;1;Records in selection([MOVIES]))
If([MOVIES]Year_of_Movie#$vCrtMovieYear)
$vCrtMovieYear:=[MOVIES]Year_of_Movie
$vInd:=$vInd+1
INSERT IN ARRAY(aMovieYear;$vInd;1)
aMovieYear{$vInd}:=$vCrtMovieYear
INSERT IN ARRAY(aSoldTickets;$vInd;1)
End if
aSoldTickets{$vInd}:=aSoldTickets{$vInd}+[MOVIES]Sold_Tickets
NEXT RECORD([MOVIES])
End for
ARRAY TEXT(aTitles;Taille tableau(aMovieYear))
ARRAY TEXT(aDirectors;Taille tableau(aMovieYear))
ARRAY TEXT(aMedias;Taille tableau(aMovieYear))
ARRAY LONGINT(aNrActors;Taille tableau(aMovieYear))
- En utilisant la commande SQL dynamique EXECUTE IMMEDIATE :
C_TEXT($tQueryTxt)
ARRAY LONGINT(aSoldTickets;0)
ARRAY INTEGER(aMovieYear;0)
C_LONGINT($MovieYear)
$MovieYear:=1979
$tQueryTxt:=""
$tQueryTxt:=$tQueryTxt+"SELECT Year_of_Movie, SUM(Sold_Tickets)"
$tQueryTxt:=$tQueryTxt+" FROM MOVIES"
$tQueryTxt:=$tQueryTxt+" WHERE Year_of_Movie >= :$MovieYear"
$tQueryTxt:=$tQueryTxt+" GROUP BY Year_of_Movie"
$tQueryTxt:=$tQueryTxt+" ORDER BY 1"
$tQueryTxt:=$tQueryTxt+" INTO :aMovieYear, :aSoldTickets;"
Begin SQL
EXECUTE IMMEDIATE :$tQueryTxt;
End SQL
ARRAY TEXT(aTitles;Taille tableau(aMovieYear))
ARRAY TEXT(aDirectors;Taille tableau(aMovieYear))
ARRAY TEXT(aMedias;Taille tableau(aMovieYear))
ARRAY LONGINT(aNrActors;Taille tableau(aMovieYear))
Pour tester tous ces exemples, lancez la base "4D SQL Code Samples" et affichez la boîte de dialogue principale. Choisissez le mode d'interrogation du moteur de 4D et cliquez sur le bouton Clause GROUP BY.