Nth Highest Distinct Record using SQL
Write a SQL query to get the nth highest distinct salary from the Employee table. +----+--------+ | Id | Salary | +----+--------+ | 1 | 100 | | 2 …
Category: database
How to Setup a PHP Script in Crontab to Clean Multiple WordPress (Database) on Same Server?
If you host many wordpress blogs on the same server, then you can do this easily by the following PHP script. I have hosted 6 websites on the one …
SQL Coding Exercise – Delete Duplicate Emails
Write a SQL query to delete all duplicate email entries in a table named Person, keeping only unique emails based on its smallest Id. +----+------------------+ | Id | Email …
SQL Coding Exercise – Duplicate Emails
The SQL coding exercise is from oj-online judge and you could submit your solution to this URL: https://oj.leetcode.com/problems/duplicate-emails/ Write a SQL query to find all duplicate emails in a …
SQL Coding Exercise – Employees Earning More Than Their Managers
The SQL Coding Exercise is from oj-leet Online Judge and you can submit your solution to this problem here: https://oj.leetcode.com/problems/employees-earning-more-than-their-managers/ The Employee table holds all employees including their managers. …