Advanced Sql MCQs
Practice Advanced Sql MCQs for competitive exams.
Advanced Sql MCQs
Practice questions from this topic.
With the UNION clause, each query involved must output the same number of columns, and they must be UNION compatible.
Correct Answer: A
A function returns one value and has only output parameters.
Correct Answer: B
A correlated subquery is where the outer query depends on data from the inner query.
Correct Answer: B
Outer join is the same as equi-join, except one of the duplicate columns is eliminated in the result table.
Correct Answer: B
The most frequently used relational operation, which brings together data from two or more related tables into one resultant table, is called an equi-join.
Correct Answer: B
ROLLBACK WORK asks SQL to empty the log file.
Correct Answer: A
The UNION clause is used to combine the output from multiple queries together into a single result table.
Correct Answer: A
When AUTOCOMMIT is set on, changes will be made automatically at the end of each SQL statement.
Correct Answer: A
A transaction is the complete set of closely related update commands that must all be done, or none of them done, for the database to remain valid.
Correct Answer: A
The code to create triggers and routines is stored in only one location and is administered centrally.
Correct Answer: A
Subqueries can be nested multiple times.
Correct Answer: A
There should be one condition within the WHERE clause for each pair of tables being joined.
Correct Answer: A