![SQL SORTING and FILTERING on HR: Display the employee Id, first name, job id, and department number for those employees whose department number equals 30, 40 or 90 - w3resource SQL SORTING and FILTERING on HR: Display the employee Id, first name, job id, and department number for those employees whose department number equals 30, 40 or 90 - w3resource](https://www.w3resource.com/w3r_images/sql-sorting-and-filtering-hr-exercise-21-duration.png)
SQL SORTING and FILTERING on HR: Display the employee Id, first name, job id, and department number for those employees whose department number equals 30, 40 or 90 - w3resource
![Authoritative source that <> and != are identical in performance in SQL Server - Database Administrators Stack Exchange Authoritative source that <> and != are identical in performance in SQL Server - Database Administrators Stack Exchange](https://i.stack.imgur.com/ThPRY.png)
Authoritative source that <> and != are identical in performance in SQL Server - Database Administrators Stack Exchange
![Count occurrences both greater than, less than, or equal in MySQL – Count occurrences both greater than, less than, or equal in MySQL Count occurrences both greater than, less than, or equal in MySQL – Count occurrences both greater than, less than, or equal in MySQL](http://www.jdhodges.com/wp-content/uploads/2014/05/2014_05_30-recycled-query-831x520.png)