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 …

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 …

Nov 22, 2009 · In SQL you use 0 and 1 to set a bit field (just as a yes/no field in Access). In Management Studio it displays as a false/true value (at least in recent versions).

Nov 28, 2022 · SQL Server uses the bit data type that stores 0, 1, and NULL values that can be used instead of the TRUE, FALSE, and NULL values. In this tutorial, we will teach several examples to …

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.

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.

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.

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 …

Aug 6, 2019 · Do you need to store a boolean value in your SQL database? Does the data type even exist? Read this article and find out.

Jan 19, 2025 · Understanding how Boolean values work is crucial for managing logical operations in databases, and this article will explore the intricacies of the Boolean data type, its applications, and …