Using SQLite

Learning SQL

The goal of this chapter is to introduce you to all the major SQL commands and show some of the basic usage patterns. The first time you read through this chapter, don’t feel you need to absorb everything at once. Get an idea of what structures the database supports, and how they might be used, but don’t feel that you need to memorize the details of every last command.

For people just getting started, the most important commands are CREATE TABLE, INSERT, and SELECT. These will let you create a table, insert some data into the table, and then query the data and display it. Once you get comfortable with those commands, you can start to look at the others in more depth. Feel free to refer back to this chapter, or the command reference in Appendix C. The command reference provides detailed descriptions of each command, including some of the more advanced syntax that isn’t covered in this chapter.

Always remember that SQL is a command language. It assumes you know what you’re doing. If you’re directly entering SQL commands through the sqlite3 application, the program will not stop and ask for confirmation before processing dangerous or destructive commands. When entering commands by hand, it is always worth pausing and looking back at what you’ve typed before you hit return.

If you are already reasonably familiar with the SQL language, it should be safe to skim this chapter. Much of the information here is on the SQL language in general, but there is some information about ...