Update repo description

Author: ayushi-b

README.md

@@ -9,13 +9,11 @@ You can restore the toy dataset  "parch and posey" to your local machines from t
 
 Now, SQL commands can be used to explore the dataset and run queries on it.
 
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 Here is the schema of the database used for all the queries.
 
 ![](schema.png)
 
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 I have also included the screenshots from the videos for some important and useful concepts that may need revision in future.