An SQL developer must decide what type of data that will be stored inside each column when creating a table. The data type is a guideline for SQL to understand what type of data is expected inside of …

Nov 28, 2022 · Summary SQL Server does not include the SQL Boolean data type like other databases, but you can use the SQL Boolean which is the same. The main difference is that instead of using …

Sep 23, 2025 · By the end of this guide, you will know whether the BOOLEAN data type exists in SQL, how to use/implement it in MySQL, PostgreSQL, SQL Server, and Oracle, and why it is important.

Now that you understand how Boolean data types are implemented in SQL Server and MySQL, let us explore how to handle Boolean data in SQL, including filtering and querying based on Boolean columns.

Jul 23, 2025 · Boolean expressions are a core concept in SQL, helping to filter and manipulate data based on conditions. These expressions evaluate to one of three Boolean values: TRUE, FALSE, or …

Aug 21, 2025 · A Boolean represents two possible values (true or false), and MySQL offers a way to store this binary logic with BIT. Technically, BIT (1) can store a single binary value (0 or 1), making it …

Nov 13, 2025 · PostgreSQL provides the standard SQL type boolean; see Table 8.19. The boolean type can have several states: “true”, “false”, and a third state, “unknown”, which is represented by the …

Boolean Basics: Boolean values in SQL (TRUE, FALSE, NULL) are fundamental for filtering and manipulating data. They represent truth values, essential for crafting precise queries.

The PL/SQL data type BOOLEAN stores logical values, which are the boolean values TRUE and FALSE and the value NULL. NULL represents an unknown value.

You will learn how to use the MySQL BOOLEAN data type, which is the synonym of TINYINT (1), and how to manipulate Boolean values.