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CREATE TABLE prodtrans
(
pno number (4)
ptype char (1) CHECK (ptype in ('I','R','S')), qty number (5)
FOREIGN KEY pno REFERENCES product (pno) ON DELETE CASCADE);
In the table so formed please reminder the referential constraint on the foreign key pno in prodtrans table to product table. Any product record if removed from the product table will trigger deletion of all the related records (ON DELETE CASCADE) in the prodtrans table.
What are aggregate functions? And list the aggregate functions supported by SQL? Aggregate functions are functions that take a collection of values as input and return a one va
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