Frequently Asked Questions (FAQ) for PostgreSQL
- Last updated: Tue Oct 9 16:13:00 EDT 2007
+ Last updated: Fri Oct 12 23:36:59 EDT 2007
developers spread throughout the world and communicating via the
Internet. It is a community project and is not controlled by any
company. To get involved, see the developer's FAQ at
- http://www.postgresql.org/files/documentation/faqs/FAQ_DEV.html
+ http://www.postgresql.org/docs/faqs.FAQ_DEV.html
1.2) Who controls PostgreSQL?
http://www.commandprompt.com/ppbook/. There are a number of PostgreSQL
books available for purchase. One of the most popular ones is by Korry
Douglas. A list of book reviews can be found at
- http://techdocs.postgresql.org/techdocs/bookreviews.php. There is also
- a collection of PostgreSQL technical articles at
- http://techdocs.postgresql.org/.
+ http://www.postgresql.org/docs/books/. There is also a collection of
+ PostgreSQL technical articles at
+ http://www.postgresql.org/docs/techdocs.
The command line client program psql has some \d commands to show
information about types, operators, functions, aggregates, etc. - use
1.11) How can I learn SQL?
- First, consider the PostgreSQL-specific books mentioned above. Another
- one is "Teach Yourself SQL in 21 Days, Second Edition" at
- http://members.tripod.com/er4ebus/sql/index.htm. Many of our users
- like The Practical SQL Handbook, Bowman, Judith S., et al.,
- Addison-Wesley. Others like The Complete Reference SQL, Groff et al.,
- McGraw-Hill.
+ First, consider the PostgreSQL-specific books mentioned above. Many of
+ our users also like The Practical SQL Handbook, Bowman, Judith S., et
+ al., Addison-Wesley. Others like The Complete Reference SQL, Groff et
+ al., McGraw-Hill.
There are also many nice tutorials available online:
* http://www.intermedia.net/support/sql/sqltut.shtm
4.18) How do I return multiple rows or columns from a function?
It is easy using set-returning functions,
- http://www.postgresql.org/docs/techdocs.17
- .
-
- 4.19) Why do I get "relation with OID ##### does not exist" errors when
- accessing temporary tables in PL/PgSQL functions?
-
- PL/PgSQL caches function scripts, and an unfortunate side effect is
- that if a PL/PgSQL function accesses a temporary table, and that table
- is later dropped and recreated, and the function called again, the
- function will fail because the cached function contents still point to
- the old temporary table. The solution is to use EXECUTE for temporary
- table access in PL/PgSQL. This will cause the query to be reparsed
- every time.
+ http://www.postgresql.org/docs/techdocs.17.
4.19) What replication solutions are available?