adplus-dvertising
frame-decoration

Question

The following MySQL statement is valid.
SELECT abc, xyz FROM table1 UNION abc, def FROM table2;

a.

True

b.

False

c.

May be True or False

d.

Can't say

Posted under MySQL Database

Answer: (a).True

Engage with the Community - Add Your Comment

Confused About the Answer? Ask for Details Here.

Know the Explanation? Add it Here.

Q. The following MySQL statement is valid.

Similar Questions

Discover Related MCQs

Q. The keyword used with UNION that does not retain duplicate rows is _____________

Q. The keyword used with UNION that retains duplicate rows is ______________

Q. The log that contains a record of server startups and shutdowns and the messages about exceptional conditions is ______________

Q. The log that identifies statements that may be in need of being rewritten for better performance is ______________

Q. The default value in seconds in the system variable ‘long_query_time’ is ______________

Q. The logging option to enable binary log index file is ______________

Q. Usage of aggregates in WHERE clause is not allowed.

Q. The operators that are used when a subquery returns multiple rows to be evaluated in comparison to the outer query are _____________

Q. The ALL subquery performs operations on _____________

Q. What is the kind of delete when deletion of an employee from the table also deletes that employee from another table?

Q. The storage engine in MySQL that provides foreign key support is ___________

Q. What is the property of InnoDB that enforces foreign key relationships stay intact?

Q. Which mode exists at both global level and session-specific level?

Q. Which system variable determines the number of rows from INSERT DELAYED statements that can be queued per table?

Q. The largest value to which the variable ‘max_allowed_packet’ can be set is ______________

Q. Increasing the value of which system variable enables mysqld to keep more tables open simultaneously?

Q. The keyword used with UNION that retains duplicate rows is ___________

Q. The search mode that uses natural language search as a subroutine is ____________

Q. For what can the FULLTEXT indexes be created for?

Q. A FULLTEXT index can be created for multiple columns.