Data Types

Every column in a SQL table has a data type, which is a rule that tells the database what kind of values it can store.

Choosing the right data types helps you design efficient tables, prevent errors, and improve database performance.

Review the slide deck on the right to learn:

• Why data types matter in schema design
• How different types (e.g., TEXT, INT, REAL) behave
• Where you'll typically use each type in real-world applications