CHECK Constraints

In SQLite, we have various functions and constraints. In this article, the main focus is on the ‘CHECK’ constraint. It is used to enforce a condition within a column or table. It allows only those values to be inserted or updated in the table that follows that specific condition of the CHECK constraint. In simple words, it enforces the values that are inserted or updated in the table/column.

Let’s take an example:

Suppose we have a table ‘voter’. In this table, we only want to insert or update those values whose ‘age’ is above 18 years. In this kind of scenario, we can take the help of the CHECK constraint.

SQLite is a lightweight and embedded Relational Database Management System (commonly known as RDBMS). It is written in C Language. It supports standard SQL syntax. It is a server-less application which means it requires less configuration than any other client-server database (any database that accepts requests from a remote user is known as a client-server database). Its server-less aspect makes it a good fit for mobile, embedded, and simple desktop applications. It may not be a good fit for large-scale applications but it can offer various other aspects like simplicity and portability.

In this article, we are going to explore SQLite CHECK constraints. We going to explore its use cases with different scenarios.