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 …

Nov 11, 2025 · In SQL, each column must be assigned a data type that defines the kind of data it can store, such as integers, dates, text, or binary values. Choosing the correct data type is …

This SQL tutorial provides a list of general SQL datatypes. These data types may not be supported by all relational databases.

SQL data types specify the type of data that a column or variable can hold in a SQL database. These data types include numeric, character and string, date and time, binary, boolean, …

Nov 18, 2025 · This article provides a summary of the different data types available in the SQL Server Database Engine.

Jun 18, 2025 · Here is a comprehensive table of the most common SQL numeric data types, including their storage size and value ranges.

Jan 20, 2025 · Complete reference for SQL data types across different database systems. Choose the right data type for your columns with practical examples and best practices.

This chapter provides an overview and more detailed description of the properties of the types in each category, and a summary of the data type storage requirements.

When creating tables or declaring variables in SQL, it’s important to specify the data type for each column or variable. The data type determines the kind of data that can be stored in the column …

Aug 6, 2025 · Learn SQL data types with clear examples, best practices, and conversion tips. Understand INT, VARCHAR, DATE, JSON, and more for better SQL performance.