Question
The effluents of which among the following industries
are considered to be the main cause for lowering the pH value of river water?Solution
The correct answer is A
Which of the following is a key characteristic that distinguishes a PL/SQL `FUNCTION` from a PL/SQL `PROCEDURE`?
Which SQL statement combines the results of two queries and removes duplicates?
Which SQL clause is used to filter records based on aggregate functions?
Which SQL clause is used to filter results after a GROUP BY operation?
Which of the following statements about SQL `INDEXES` is generally TRUE?
Which SQL clause is used for filtering rows?
Given a table employees(id, dept_id, salary), which query returns departments with average salary greater than overall average across the company?
What is the main function of a PL/SQL `TRIGGER`?
Which join returns rows from the left table even when there is no matching row in the right table, filling with NULLs for the right side?
Which SQL clause is used to group rows?
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