What is the primary function of the SQL UPDATE command?

The SQL UPDATE command is designed to modify the existing records in a database table. Its primary function is to change the value in one or more fields (or columns) of one or more rows that meet a specified condition. This allows users to update data without the need to delete the existing records and insert new ones, streamlining the process of data management and ensuring data integrity.

For instance, if you have a customer database and you want to update the address of a specific customer, you would use the UPDATE command to change the address field while keeping the customer's other information intact. This command typically includes a SET clause to specify which fields to update, along with a WHERE clause to identify which records should be affected.

In the context of the other options, the DELETE command performs the function of removing records; the CREATE command generates a new table; and the SELECT command is responsible for retrieving data from tables. These functionalities highlight the distinct role of the UPDATE command within SQL.