Update aggregate-function docs for STDDEV, VARIANCE.

diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
index 1e393c623bc9ec226658a9e4071f319101ee5193..09524f8518d314fe786986120ebfa0532fe86231 100644 (file)
--- a/doc/src/sgml/func.sgml
+++ b/doc/src/sgml/func.sgml
@@ -1539,7 +1539,7 @@ Not defined by this name. Implements the intersection operator '#'
 
    
     Aggregate functions allow the generation of simple
-    statistics about the values of particular columns over the selected set
+    statistics about the values of given expressions over the selected set
     of rows.