diff --git a/doc/src/sgml/advanced.sgml b/doc/src/sgml/advanced.sgml
index 06d3a737c5f..218988e0afc 100644
--- a/doc/src/sgml/advanced.sgml
+++ b/doc/src/sgml/advanced.sgml
@@ -173,7 +173,7 @@ UPDATE branches SET balance = balance + 100.00
- The details of these commands are unimportant here; the important
+ The details of these commands are not important here; the important
point is that there are several separate updates involved to accomplish
this rather simple operation. Our bank's officers will want to be
assured that either all these updates happen, or none of them happen.
@@ -428,7 +428,7 @@ SELECT depname, empno, salary, rank() OVER (PARTITION BY depname ORDER BY salary
We already saw that ORDER BY> can be omitted if the ordering
- of rows is unimportant. It is also possible to omit PARTITION
+ of rows is not important. It is also possible to omit PARTITION
BY>, in which case there is just one partition containing all the rows.
diff --git a/doc/src/sgml/ltree.sgml b/doc/src/sgml/ltree.sgml
index 7f127ac49cf..06b262bccb8 100644
--- a/doc/src/sgml/ltree.sgml
+++ b/doc/src/sgml/ltree.sgml
@@ -160,7 +160,7 @@ Europe & Russia*@ & !Transportation
This will match paths that contain the label Europe and
any label beginning with Russia (case-insensitive),
but not paths containing the label Transportation.
- The location of these words within the path is unimportant.
+ The location of these words within the path is not important.
Also, when %> is used, the word can be matched to any
underscore-separated word within a label, regardless of position.
diff --git a/doc/src/sgml/syntax.sgml b/doc/src/sgml/syntax.sgml
index f496fa88004..a01f9b5fc4e 100644
--- a/doc/src/sgml/syntax.sgml
+++ b/doc/src/sgml/syntax.sgml
@@ -2375,7 +2375,7 @@ LANGUAGE SQL IMMUTABLE STRICT;
b inputs will be concatenated, and forced to either
upper or lower case depending on the uppercase
parameter. The remaining details of this function
- definition are unimportant here (see for
+ definition are not important here (see for
more information).
diff --git a/doc/src/sgml/tablefunc.sgml b/doc/src/sgml/tablefunc.sgml
index 520886b811b..cfa20e2a70c 100644
--- a/doc/src/sgml/tablefunc.sgml
+++ b/doc/src/sgml/tablefunc.sgml
@@ -516,7 +516,7 @@ row_name extra cat1 cat2 cat3 cat4
In practice the source_sql query should always
specify ORDER BY 1> to ensure that values with the same
row_name are brought together. However,
- ordering of the categories within a group is unimportant.
+ ordering of the categories within a group is not important.
Also, it is essential to be sure that the order of the
category_sql query's output matches the specified
output column order.