Update README for bindings db

Signed-off-by: sunzhaochang <[email protected]>

bindings/db/README.md

@@ -2,7 +2,7 @@
 
 This quickstart uses a specific sample database called `postgres` to back up orders data.  
 
-The database is implemented using the official base [`postgres`](https://hub.docker.com/_/postgres) container image as a base and customizing it to initialize using the SQL script in `orders.sql`.  For convience, building, running, and setting of customizable environment variables (e.g. DB name and password) is handled in the `docker-compose.yaml` file.  
+The database is implemented using the official base [`postgres`](https://hub.docker.com/_/postgres) container image as a base and customizing it to initialize using the SQL script in `orders.sql`.  For convenience, building, running, and setting of customizable environment variables (e.g. DB name and password) is handled in the `docker-compose.yml` file.
 
 To start the database simply run the following in this folder:
 ```bash
@@ -14,14 +14,14 @@ To explore the database using the interactive CLI run:
 docker exec -i -t postgres psql --username postgres  -p 5432 -h localhost --no-password
 ```
 
-At the prompt change to the `orders` table with:
+At the prompt change to the `orders` database with:
 ```bash
-\c tables;
+\c orders;
 ```
 
 Explore data using:
 ```bash
-select * from orders
+select * from orders;
 ```
 
 To clean up, CTRL-C the terminal or run: