Question
Point X is 13m north of point U. Point W is 17m west of
point V. Point T is 5m east of point U. Point S is 12m west of point X. Point T is 9m south of point V. What is the shortest distance between points W and point U?Solution
Shortest distance between points W and point U = √ 9² + 12² = √ 81 + 144 = √ 225 = 15 m.
Which type of index physically reorders the data rows in the table itself based on the index key, meaning the data is stored in the order of the index?
Recursive CTEs are mainly used for:
To rename a column in a SELECT query result, you use:
Which PL/SQL cursor attribute returns `TRUE` if the most recent `FETCH` statement returned a row, and `FALSE` otherwise?
Which of the following is a key characteristic that distinguishes a PL/SQL `FUNCTION` from a PL/SQL `PROCEDURE`?
Which SQL keyword prevents duplicate rows in result?
Which operator is used to combine results of two SELECT queries and remove duplicates?
What is the result of SELECT COUNT(NULL) on any table?
Which of the following SQL constructs avoids returning duplicate rows?
What is a 'stored procedure' in SQL?
