SQL Dialects Reference/References

Standards

• SQL-86
• SQL-89
• SQL-92 — full text is available
• SQL:1999 — can be purchased from ISO
• SQL:2003 — can be purchased from ISO
• working draft of SQL:2008, downloadable from Whitemarsh Information Systems Corporation.
• SQL:2008 — can be purchased from ISO
• SQL:2011 — can be purchased from ISO

Official product documentations

• DB2 Version 9 Information Center
• MonetDB documentation
• MySQL 5.0 reference manual
• PostgreSQL 8.2 reference manual
• SQLite documentation
• Firebird / Interbase 6 language reference (ZIP archive, 8.9MB)
• OpenLink Virtuoso Universal Server Documentation
• Oracle Database 10g2 SQL Reference
• Oracle Database 12g1 SQL Reference
• Microsoft SQL Server Documentation
• Linter SQL Server Documentation (English, old version);Linter SQL Server Documentation (Russian)

Single implementation references and cheat sheets

• Oracle PL/SQL Cheatsheet
• Oracle XML Cheatsheet

Comparisons

• Comparison of different SQL implementations
• Comparison of Oracle, MySQL and PostgreSQL DBMS by Computing Division of Fermi National Accelerator Laboratory
• SQL Function Reference: Oracle vs. SQL Server
• Kline, Kevin E. (2001). "SQL Functions". SQL in a Nutshell. Cambridge, MS: O'Reilly. ISBN 1-56592-744-3. {{cite book}}: Unknown parameter |chapterurl= ignored (|chapter-url= suggested) (help); Unknown parameter |coauthors= ignored (|author= suggested) (help); Unknown parameter |month= ignored (help)
• SQL Functions — MySQL vs Oracle comparison by Eric Brian
• Standard SQL - an article by Peter Gulutzan that compares SQL standards support in DB2, MSSQL and Oracle

Migration

• Converting MySQL to PostgreSQL