SQL

SQL is the Structured Query language, the language for talking with databases.

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People ask me which book to buy for SQL. My recommendation is SQL: The Complete Reference by James R. Groff, Paul N. Weinburg, and Andrew J. Oppel, now in the third edition. Start with PHP, the Apache Web server, and the MySQL database. As soon as you have your Web site running reliably with MySQL, buy SQL: The Complete Reference, set up the sample databases and practice with SQL Server then Oracle.