Computer Science for IGCSE & O level - Hardware (Section 2 - No. 28)
When the stock item barcode is scanned at the checkout, what item is reduced by 1?
The key field in the database.
The value of the product.
The number of stock items.
The number of barcodes scanned.
Giải thích
The stock item is reduced by one when the barcode is scanned.