README.md in data_sanity-0.1.0 vs README.md in data_sanity-0.1.2

@@ -10,5 +10,17 @@
 +----+------------+-------------+-------------------+-----------------------+
 | id | table_name | primary_key	| primary_key_value | errors                |
 +----+------------+-------------+-------------------+-----------------------+
 | 1	 |  Person	  | person_id	| 128	            | “Fmno can’t be blank” |
 +----+------------+-------------+-------------------+-----------------------+
+
+# HOW TO USE
+    * adding migrations : rake data_sanity:db:migrate
+    * removing migrations : rake data_sanity:db:rollback
+    * Use normal rake db:migrate to migrate the migration added by rake data_sanity:db:migrate
+    * You can add a sample criteria file using rake data_sanity:criteria
+    * To Investigate your data use rake data_sanity:investigate
+        - By default it runs for all data
+        - rake data_sanity:investigate[random,2]
+            : parameter 1: random: show you want random selection
+            : parameter 2: lets you add as many random records you want to verify [default is 1]
+            : Note: if you have a criteria file it works only for models in criteria file