This query will find all pairs of values in a table where one value is double the other.
Design a SQL query that will return the titles of all books that are currently checked out from a library catalog.
This technical problem deals with getting all rows from a table, even if some of the rows are locked. The solution is to write a SQL query that will return all rows from the table.
The problem is how to design a system to track which items in a database are currently being edited by which users. The input is when a user starts editing an item, and the output is who is currently editing what.
Given a table of data with three columns: id, start, and end, this SQL query will find all pairs of rows where the start and end times overlap.
Write a SQL query to find the names of all the items that have a price greater than or equal to $10.