This book explains the purpose and proper syntax of hundreds of SQL statements, as defined in four major SQL implementations, and details each entry with explanatory text and illustrative examples. their inclusion of open-source MySQL, which in most situations carry no licensing fees, is a growing recognition of its popularity and suitability for serious database applications; also, increasing the appeal of this book for Unix and Linux developers. The majority of real slim book consists of useful syntax documentation (which in the style of Unix man pages, with bracketed options and monospace arguments) and other information specific to individual statements and functions. Material that is not specific statement also contrasts data-type implementation of the four platform closed - for example, readers learn that PostgreSQL int2 value is known as a smallint in ANSI standard SQL -. David Wall Topics covered: Structured Query Language (SQL), as implemented in Oracle, Microsoft SQL Server, MySQL, and PostgreSQL, as well as in ANSI standard SQL (SQL-92 and SQL99).