SQL Deep Dives

How Is SQL’s Not Equal Operator Used?

The SQL not equal operator is a comparison operator that is used to find rows in a relational database. In this article, we’ll take a look at how it’s used. The Syntax Let’s take a look at a typical query…

SQL ALTER TABLE: A Guide

Once you have created a table in SQL, you may realize that you have forgotten to add in a column or a constraint. Or maybe you have assigned the wrong name to a column and want to delete it from…

SQL Inner Join

When you’re working with a database, there may be times where you want to get data from two or more tables at the same time and combine the result. For example, you may want to get a list of products…

SQL Group By

When you’re working with aggregate functions in SQL, you may want to group rows together by common column values. For example, you may want to get a list of branch names for your business, as well as the number of…

SQL Add Column

After you have created a table in SQL, you may realize that you forgot to add in a specific column that you need. For example, you may have created a database to store a list of suppliers, and forgot to…

SQL Union

When you’re querying a database, you may want to combine the result of two or more SELECT statements. For example, you may want to get a list of the cities in which your customers are based, and the cities in…

SQL Like

Databases are a tool used to store information on computers. Information in a database can be a variety of different data types—such as numbers, strings, and dates—and the data can be queried at any time. For example, a database could…

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