Learn ways to use COUNT and DISTINCT together within a single SQL query. >>>
Monthly Archives: July 2025
What’s the Ideal Data Type to Use When Storing Latitude / Longitude in a MySQL Database?
Storing latitude and longitude data in relational databases poses some challenges due to the spatial nature of the data, as traditional numeric data types don’t lend themselves well to their related calculations. In this article, we’ll explore some options for storing geographical coordinates (latitude/longitude) in MySQL including DECIMAL and POINT. We’ll also say why you shouldn’t use FLOAT. >>>
How to Use Columns From a Subselect in WHERE Clause in SQL
Learn how to use columns from subselects within WHERE clauses in SQL. >>>
Fixing MySQL ‘Host Not Allowed’ Error: A Simple Guide
Learn how to fix this MySQL connection error. >>>
How To Count Distinct Over Multiple Columns
A quick tutorial on using COUNT DISTINCT on multiple columns in SQL. >>>
Find the Default Value of a Column in SQL
Learn how to find columns’ default values in SQL and how they affect data integrity. >>>
Most Efficient Way to Get Table Row Count in SQL
Learn efficient ways to get the table row count without performance degradation and burdening the server. >>>
How to Configure Time Zone Settings in MySQL?
Learn how MySQL handles time zones. >>>
Types of Locks in SQL Server
Study the types of locks in SQL Server and when they are used. >>>
Change a PostgreSQL User Password
Learn different ways to update the PostgreSQL user password. >>>