Cara menghitung jumlah multi kolom di Oracle

THEN klausa dalam CASE ekspresi salah:

CASE WHEN SUM(L55.TOTAL_QUANTITY - BC.FULLBOX * L55.PACKING_STYLE) = 0  
     THEN L55.SPAREBOX = 0
----------^
     WHEN SUM(L55.TOTAL_QUANTITY - BC.FULLBOX * L55.PACKING_STYLE) != 0 
     THEN L55.SPAREBOX = 1
END AS SPARE_QUANTITY

Oracle tidak memiliki tipe data Boolean di SELECT kueri.

Saya kira Anda hanya ingin:

(CASE WHEN SUM(L55.TOTAL_QUANTITY - BC.FULLBOX * L55.PACKING_STYLE) = 0  
      THEN 0
      WHEN SUM(L55.TOTAL_QUANTITY - BC.FULLBOX * L55.PACKING_STYLE) <> 0 
      THEN 1
 END) AS SPARE_QUANTITY

Atau, jika Anda ingin menghilangkan CASE :

ABS(SIGN(SUM(L55.TOTAL_QUANTITY - BC.FULLBOX * L55.PACKING_STYLE))) AS SPARE_QUANTITY