PostGIS in Action: (ed. #3) Appendix C - SQL primer

• Information Schema
• Basic SQL functions available in most relational databases
• JOINS (INNER, OUTER, LEFT, RIGHT, FULL, INTERSECT, EXCEPT)
• Doing SELECTS, INSERTS, UPDATES, and DELETES
• Using Aggregates
• Using subselects
• Window functions and Window aggregates
• Common Table Expressions (CTEs)

This chapter highlights the more or less ANSI/ISO SQL Compliant features of PostgreSQL. It introduces the basic concepts of SQL. For those familiar with SQL already, it showcases some of the high-level ANSI SQL features that PostgreSQL supports that you would expect of an enterprise relational database.

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