Question
Which type of join returns all rows from the left table
and matching rows from the right table?Solution
LEFT JOIN returns all records from the left table and matching records from the right table; non-matching right-side rows return NULL.
What is referential integrity?
Which normal form removes transitive dependency?
Which SQL command is used to retrieve data from a table?
In two-phase locking, a transaction releases its locks:
In a relational database, what is a foreign key?
In two-phase locking, a transaction releases its locks:
In a relational database, what is a candidate key?
Which type of join returns only matching records from both tables?
Which normal form eliminates transitive dependency?
Which normal form removes partial dependency?