【简答题】Look at the statements below and the information about training courses on the opposite paper. Which course (A, B, C, or D) does each statement 1-7 refer to? For each statement 1-7, mark one letter (A...
【单选题】The following triggers were defined for table TAB1 in the order shown:CREATE TRIGGER trig_a AFTER UPDATE ON tab1 FOR EACH ROW UPDATE sale_tab SET sale_date = CURRENT DATE; CREATE TRIGGER trig_b AFTER ...