Revise paste Task 1 - SQL

a) без филтриране по INFO1

SELECT 
    AUFTRAGSNUMMER AS "Order number", 
    DATUMAEXTERN AS "Order date created",
    KUNDENNR AS "BP number", 
    NAME1 AS "Name of the client",
    MAINLAND AS "Country of the client", 
    BSBELADESTART AS "Loading date start",
    BSBELADEEND AS "Loading date end", 
    ESENTLADESTART AS "Unloading date start",
    ESENTLADEEND AS "Unloading date end", 
    ABS_ORT1 AS "Loading City",
    EMP_ORT1 AS "Unloading City"
FROM 
    AKOPF
LEFT JOIN
    SKUNDEN ON SKUNDEN.NR = AKOPF.FRACHTAGNR
LEFT JOIN
    ASENDUNG ON AKOPF.NR = ASENDUNG.AKOPFNR;

б) Полето INFO1 не е празно и не съдържа само space-ове