MCQ IN COMPUTER SCIENCE & ENGINEERING

Detailed explanation-1: -The SQL EXCEPT clause/operator is used to combine two SELECT statements and returns rows from the first SELECT statement that are not returned by the second SELECT statement. This means EXCEPT returns only rows, which are not available in the second SELECT statement.

Detailed explanation-2: -SQL Commands: Data Definition Language Commands (DDL) CREATE. DROP. TRUNCATE. ALTER. BACKUP DATABASE.

Detailed explanation-3: -The SQL EXCEPT statement is used to filter records based on the intersection of records returned via two SELECT statements. The records that are common between the two tables are filtered from the table on the left side of the SQL EXCEPT statement and the remaining records are returned.

Detailed explanation-4: -except removes all occurrences of duplicate data from set A, whereas except all only removes one occurrence of duplicate data from set A for every occurrence in set B.