SQL, or the structured query language, is a specialized programming language designed for working with databases. There are a few different variations of SQL from different organizations and projects, ...

edit: I didn't read the whole question. :facepalm: But basically, grouping by the day of week in place of date should get you where you want to go. Start with the query you posted above, then use that ...

A common SQL habit is to use SELECT * on a query, because it’s tedious to list all the columns you need. Plus, sometimes those columns may change over time, so why not just do things the easy way? But ...

SQL is a convenient way to manage and query your data, but badly written queries can tie up your database. Here are seven common SQL traps and how to avoid them. Database developers have it tough.

When it comes to improving the performance of database systems, there are nearly as many approaches as there are DBA (database administrator) teams. That might sound acceptable at first glance. But, ...