A.They require the NOT EXISTS operator in the join condition.

B.They have no join condition.

C.They require the EXISTS opnrator in the join condition.

D.They are always equijoins.

E.They require table aliases.

F.They can use INNER JOIN and LEFT JOIN.

A.an entity

B.an optionality

C.a cardinality

D.label

E.a unique identifier

F.an attribute

A.SELECT product_id, (unit_price * 0.15 / (4.75 + 552.25)) FROM products;

B.SPLECT product_id, expiry_date * 2 FROM products;

C.SELECT produet_id, unit_pricer, 5 "Discount",unit_price+surcharge-discount FROM products;

D.SELECT ptoduct_id, (expiry_date-delivery_date) * 2 FROM products;

E.SELECT product_id,unit_price || "Discount", unit_price + surcharge-discount FROM products;

F.SELEGT product_id, unit_price, unit_price + surcharge FROM products;

A.The UPDATE statement executes successfully even if the subquery selects multiple rows.

B.The subquery is not a correlated subquery.

C.The subquery is executed before the UPDATE statement is executed.

D.The subquery is executed for every updated row in the ORDERS table.

E.All existing rows in the ORDERS table are updated.

A.A UNIQUE index can be altered to be non-unique.

B.When a table is dropped and is moved to the RECYCLE BIN, all Indexes built on that table are permanently dropped.

C.An update to a table can result in no updates to any of the table's indexes.

D.A table belonging to one user can have an index that belongs to a different user,

E.An update to a table can result in updates to any or all of the table's indexes.

F.A SELECT statement can access one or more indices without accessing any tables.