Add info about selecting a random row.

diff --git a/doc/FAQ b/doc/FAQ
index c188796c0eb38c6632f23b727746aa57aef47735..234267d2814478b6d77a08f1189bd121bec9aa88 100644 (file)
--- 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 ([email protected])
    
@@ -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 c63696aa5872fa592f5de6191752c3ff9cb56566..23e7c92d06b7227438f77b2fd5cd90fdae52b29e 100644 (file)
--- a/doc/src/FAQ/FAQ.html
+++ b/doc/src/FAQ/FAQ.html
@@ -10,7 +10,7 @@
   alink="#0000ff">
     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 (
     "mailto:[email protected]">[email protected])
@@ -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.
 
     4.2) How do I SELECT only the
-    first few rows of a query?
+    first few rows of a query?  A random row?
 
     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;
+
+
     4.3) How do I get a list of tables or other
     things I can see in psql?