When Can You Be Sure That A Query Will Return Only One Row?

1.	When Can You Be Sure That A Query Will Return Only One Row?
Answer» When you USE the PRIMARY KEY and only the primary key in the where CLAUSE. When you use the primary key and only the primary key in the where clause.

Answer»

When you USE the PRIMARY KEY and only the primary key in the where CLAUSE.

When you use the primary key and only the primary key in the where clause.

Discussion