How can you calculate the cumulative average of a column with a window function?
Which type of database management system represents relations using tables?
The Function 'fetchrow_hashref()' returns reference to hash row values keyed by ______________
You are troubleshooting a MySQL database performance issue where a query is not using the correct index. Which MySQL command-line tool can help you analyze the query execution plan and suggest index optimizations?
What is a composite key?
The employees table has 20 records, what will be the output of the query SELECT gender FROM employees GROUP BY gender;
Which operator is used in MySQL to select values within a specific range?
What command will delete all records from a table but keep its structure?
What will be the effect of the query SELECT c.*,e.* FROM clients c INNER JOIN employees e ON c.emp_no = e.emp_no;
What improvements can be made to the query UPDATE students SET `contact number` = 0999;