diff --git a/doc/FAQ b/doc/FAQ index c188796c0e..234267d281 100644 --- a/doc/FAQ +++ b/doc/FAQ @@ -1,7 +1,7 @@ Frequently Asked Questions (FAQ) for PostgreSQL - Last updated: Mon May 26 15:25:04 EDT 2003 + Last updated: Wed May 28 00:35:16 EDT 2003 Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us) @@ -58,7 +58,7 @@ Operational Questions 4.1) What is the difference between binary cursors and normal cursors? - 4.2) How do I SELECT only the first few rows of a query? + 4.2) How do I SELECT only the first few rows of a query? A random row? 4.3) How do I get a list of tables or other things I can see in psql? 4.4) How do you remove a column from a table, or change it's data type? @@ -627,7 +627,7 @@ See the DECLARE manual page for a description. - 4.2) How do I SELECT only the first few rows of a query? + 4.2) How do I SELECT only the first few rows of a query? A random row? See the FETCH manual page, or use SELECT ... LIMIT.... @@ -637,6 +637,12 @@ evaluate only the first few records requested, or the entire query may have to be evaluated until the desired rows have been generated. + To SELECT a random row, use: + SELECT col + FROM tab + ORDER BY random() + LIMIT 1; + 4.3) How do I get a list of tables or other things I can see in psql? You can read the source code for psql in file diff --git a/doc/src/FAQ/FAQ.html b/doc/src/FAQ/FAQ.html index c63696aa58..23e7c92d06 100644 --- a/doc/src/FAQ/FAQ.html +++ b/doc/src/FAQ/FAQ.html @@ -10,7 +10,7 @@ alink="#0000ff">
Last updated: Mon May 26 15:25:04 EDT 2003
+Last updated: Wed May 28 00:35:16 EDT 2003
Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us)
@@ -83,7 +83,7 @@
4.1) What is the difference between binary
cursors and normal cursors?
4.2) How do I SELECT only the
- first few rows of a query?
+ first few rows of a query? A random row?
4.3) How do I get a list of tables or other
things I can see in psql?
4.4) How do you remove a column from a
@@ -799,7 +799,7 @@
description.
See the FETCH manual page, or use SELECT ... LIMIT....
@@ -811,6 +811,14 @@ records requested, or the entire query may have to be evaluated until the desired rows have been generated. +To SELECT a random row, use: +
+ SELECT col + FROM tab + ORDER BY random() + LIMIT 1; ++