Which keyword used with UNION does not retain duplicate rows?(a) ALL(b – InterviewSolution

InterviewSolution

1.	Which keyword used with UNION does not retain duplicate rows?(a) ALL(b) NARROW(c) STRICT(d) DISTINCT
Answer» The correct answer is (d) DISTINCT For explanation: The keyword ‘DISTINCT’ used along with ‘UNION’ is synonymous with just the ‘UNION’ statement. It produces only the distinct rows from the combination of the two tables in the SELECT query.

Discussion

No Comment Found

Related InterviewSolutions

What is data in a MySQL database organized into?(a) Objects(b) Tables(c) Networks(d) File systems
The datatype for single precision floating point number is ____________(a) FLOAT(b) DOUBLE(c) INT(d) BIGINT
Which of these values is not valid as an AUTO_INCREMENT value?(a) 0(b) 1(c) 2(d) 3
If an integer column is used for the values in range 1 to 99999, the best suitable datatype is ____________(a) MEDIUMINT SIGNED(b) MEDIUMINT UNSIGNED(c) SMALLINT SIGNED(d) SMALLINT UNSIGNED
INT3 maps to MySQL type _____________(a) TINYINT(b) SMALLINT(c) MEDIUMINT(d) BIGINT
INT2 maps to MySQL type _____________(a) TINYINT(b) SMALLINT(c) MEDIUMINT(d) BIGINT
Which procedure parameter enables the caller to pass in a value and get back a value?(a) IN(b) OUT(c) INOUT(d) GETINOUT
The hub of a MySQL installation is ______________(a) mysqla(b) mysqlb(c) mysqlc(d) mysqld
Which script initializes the data directory during installation?(a) mysql_install_db(b) mysql_install_dbm(c) mysql_init_db(d) mysql_init_dbm
The SQL mode to check for divide by zero error is ________________(a) STRICT_ALL_TABLES(b) ERROR_FOR_DIVISION_BY_ZERO(c) ERROR_DIVIDE_BY_ZERO(d) ERROR_WHEN_DIVIDE_BY_ZERO