choose three
The ORDERS table has a primary key constraint on the ORDER_ID column.
The ORDER_ITEMS table has a foreign key constraint on the ORDER_ID column,referencing the primary key of the ORDERS table.
The constraint is defined with on DELETE CASCADE.
There are rows in the ORDERS table with an ORDER_TOTAL less than 1000.
Which three DELETE statements execute successfully?
A) DELETE FROM orders WHERE order_total<1000;
B) DELETE * FROM orders WHERE order_total<1000;
C) DELETE orders WHERE order_total<1000;
D) DELETE FROM orders;
E) DELETE order_id FROM orders WHERE order_total<1000;
Answer：ACD
(Analysis: This is a test of grammar questions, a low-IQ topic, because the definition of the foreign key when using the DELETE CASCADE option, so the row in the parent table is deleted.)