4D Doc Center : Utilizar la cláusula ORDER BY

4D v14

Utilizar la cláusula ORDER BY

Esta vez nos gustaría conseguir todas las películas que se lanzaron en el año 1960 o más recientemente y para cada película obtener información adicional, como el año, título, director, los medios utilizados y boletos vendidos. El resultado debe ordenarse por año.

El código 4D inicial sería:

ARRAY LONGINT(aNrActors;0) ARRAY LONGINT(aSoldTickets;0) ARRAY INTEGER(aMovieYear;0) ARRAY TEXT(aTitles;0) ARRAY TEXT(aDirectors;0) ARRAY TEXT(aMedias;0) C_LONGINT($MovieYear) REDUCE SELECTION([MOVIES];0) $MovieYear:=1960 QUERY([MOVIES];[MOVIES]Year_of_Movie>=$MovieYear) SELECTION TO ARRAY([MOVIES]Year_of_Movie;aMovieYear;[MOVIES]Title;aTitles;[MOVIES]Director;aDirectors;[MOVIES]Media;aMedias; [MOVIES]Sold_Tickets;aSoldTickets) SORT ARRAY(aMovieYear;aTitles;aDirectors;aMedias;>)

Utilizando código SQL:

ARRAY LONGINT(aNrActors;0) ARRAY LONGINT(aSoldTickets;0) ARRAY INTEGER(aMovieYear;0) ARRAY TEXT(aTitles;0) ARRAY TEXT(aDirectors;0) ARRAY TEXT(aMedias;0) C_LONGINT($MovieYear) REDUCE SELECTION([MOVIES];0) $MovieYear:=1960 Begin SQL SELECT Year_of_Movie, Title, Director, Media, Sold_Tickets FROM MOVIES WHERE Year_of_Movie >= :$MovieYear ORDER BY 1 INTO :aMovieYear, :aTitles, :aDirectors, :aMedias, :aSoldTickets; End SQL

Utilizando comandos SQL genéricos:

C_TEXT($tQueryTxt) ARRAY LONGINT(aNrActors;0) ARRAY LONGINT(aSoldTickets;0) ARRAY INTEGER(aMovieYear;0) ARRAY TEXT(aTitles;0) ARRAY TEXT(aDirectors;0) ARRAY TEXT(aMedias;0) C_LONGINT($MovieYear) REDUCE SELECTION([MOVIES];0) $MovieYear:=1960 SQL LOGIN(SQL_INTERNAL;"";"") $tQueryTxt:="" $tQueryTxt:=$tQueryTxt+"SELECT Year_of_Movie, Title, Director, Media, Sold_Tickets" $tQueryTxt:=$tQueryTxt+" FROM MOVIES" $tQueryTxt:=$tQueryTxt+" WHERE Year_of_Movie >= :$MovieYear" $tQueryTxt:=$tQueryTxt+" ORDER BY 1" SQL EXECUTE($tQueryTxt;aMovieYear;aTitles;aDirectors;aMedias;aSoldTickets) SQL LOAD RECORD(SQL all records) SQL LOGOUT

Utilizando el comando QUERY BY SQL:

ARRAY LONGINT(aNrActors;0) ARRAY LONGINT(aSoldTickets;0) ARRAY INTEGER(aMovieYear;0) ARRAY TEXT(aTitles;0) ARRAY TEXT(aDirectors;0) ARRAY TEXT(aMedias;0) C_LONGINT($MovieYear) REDUCE SELECTION([MOVIES];0) $MovieYear:=1960 QUERY BY SQL([MOVIES];"Year_of_Movie >= :$MovieYear") SELECTION TO ARRAY([MOVIES]Year_of_Movie;aMovieYear;[MOVIES]Title;aTitles;[MOVIES]Director;aDirectors;[MOVIES]Media;aMedias; [MOVIES]Sold_Tickets;aSoldTickets) SORT ARRAY(aMovieYear;aTitles;aDirectors;aMedias;>)

Utilizando el comando SQL EXECUTE IMMEDIATE:

ARRAY LONGINT(aNrActors;0) C_TEXT($tQueryTxt) ARRAY LONGINT(aSoldTickets;0) ARRAY INTEGER(aMovieYear;0) ARRAY TEXT(aTitles;0) ARRAY TEXT(aDirectors;0) ARRAY TEXT(aMedias;0) C_LONGINT($MovieYear) REDUCE SELECTION([MOVIES];0) $MovieYear:=1960 $tQueryTxt:="" $tQueryTxt:=$tQueryTxt+"SELECT Year_of_Movie, Title, Director, Media, Sold_Tickets" $tQueryTxt:=$tQueryTxt+" FROM MOVIES" $tQueryTxt:=$tQueryTxt+" WHERE Year_of_Movie >= :$MovieYear" $tQueryTxt:=$tQueryTxt+" ORDER BY 1" $tQueryTxt:=$tQueryTxt+" INTO :aMovieYear, :aTitles, :aDirectors, :aMedias, :aSoldTickets;" Begin SQL EXECUTE IMMEDIATE :$tQueryTxt; End SQL

Para probar todos los ejemplos anteriores, lance la base "4D SQL Code Samples" y vaya a la ventana principal. A continuación, puede elegir el modo de búsqueda y presionar el botón ORDER BY clause.