The DESCRIBE command is used in SQL to provide information about the structure of a database table. It displays details such as the column names, data types, and any constraints (like primary keys or nullability) associated with each column in the table.
For example, if you want to see the structure of a table named employees, you would use:
DESCRIBE employees;This command will return a result set that includes:
- Column names
- Data types
- Whether the column can accept null values
- Key information (e.g., if it's a primary key)
- Default values (if any)
This is useful for understanding the schema of a table and for writing queries that interact with it.
