typo

Author: nigelbayliss

optimizer/histogram_history/README.md

@@ -1,19 +1,21 @@
 <h2>List history information for histograms associated with a table</h2>
 
-This is a proof-of-concept script to list information on histogram changes over time for a chosen table. In particular, it reports: 
+This is a proof-of-concept script to list information on histogram changes over time for a given table. In particular, it reports: 
 
-- Changes to histogram bucket count.
-- When histograms were added and removed for each column.
+- Changes to histogram bucket counts.
+- When histograms were added and removed for each table column.
 
-The main script is "h_hist.sql". It requires a DBA account and you supply two parameters:
+The main script is "h_hist.sql". 
+
+It requires a DBA account and you supply two parameters:
 
 <pre>
-SQL> @h_hist table_name user_name [I the user_name is 'USER', the current username will be assumed]
+SQL> @h_hist table_name user_name [If the user_name is 'USER', the current username will be assumed]
 </pre>
 
-For a worked example, see example.lst and example.sql
+For a worked example, see spool file example.lst and a test script example.sql
 
-WARNING: example.sql will issues a drop command for a table called SALES
+The WARNING: The example.sql script will drop a table called SALES. Always use test databases.
 
 DISCLAIMER:
  <br/>-- These scripts are provided for educational purposes only.