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How to find rows with empty column value in MySQL/MariaDB table (in phpMyAdmin and in command line)

Posted by Alex On August 16, 2024

How to find rows with empty column value in phpMyAdmin Suppose you want to find rows in a table where the value of a certain column is empty. To do this, you try to use the table search in phpMyAdmin. If you go to the “Search” tab in phpMyAdmin and click the “Go” button without entering any values (since you...

How to list columns in MySQL/MariaDB. How to check if a column exists in a table in PHP

Posted by Alex On July 20, 2024

Consider a situation where you need to find out whether a certain column exists in a table that is located in a database managed by a MySQL or MariaDB DBMS. In this post, we'll look at the SQL query syntax for getting a list of columns and searching for columns by name. We will also look at how to check...

What is the difference between the LIKE operator and the equal sign (=) in MySQL/MariaDB. How to use LIKE in SQL

Posted by Alex On February 13, 2024

Table of contents 1. What to use to search in MySQL/MariaDB: LIKE operator or equals (=) operator 2. When to use equal sign (=) in SQL 3. When to use the LIKE operator in SQL 4. Even more differences under the hood Conclusion What to use to search in MySQL/MariaDB: LIKE operator or equals (=) operator The LIKE operator and...