If you're a programmer or database
administrator who uses SQL
in your day-to-day work, this popular pocket guide is the ideal on-the-job reference. It uses numerous examples to address the language's complexity, and covers key aspects of SQL
used in Oracle, DB2, SQL
Server, MySQL, and PostgreSQL. That includes the syntax for querying, managing transactions, and making changes to data, as well as SQL
functions, type conversion functions and formats, and regular expression syntax.