Day 1 🚀

PostgreSQL/PostgreSQL.md

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+# PostgreSQL in Arch Linux
+
+##### Refer - [ArchWiki](https://wiki.archlinux.org/title/PostgreSQL)
+
+1. Help in PSQL
+   ```
+   \help
+   ```
+2. Create database
+   ```
+   createdb <databaseName>
+   ```
+3. Connect to a database
+   ```
+   \c <databaseName>
+   ```
+4. Show summary information about all tables in the current database
+   ```
+   \dt
+   ```
+5. Exit psql shell
+   `\q`
+   or
+   `CTRL + d`
+
+# PostgreSQL CLI Commands learn in Day 1
+
+1. Create a user
+   ```
+   CREATE USER shubham WITH PASSWORD 'pwd';
+   ```
+2. Create a Database
+   ```
+   CREATE DATABASe devs;
+   ```
+3. Granting all the database's permission to a user
+   ```
+   GRANT ALL PRIVILEGES ON DATABASE devs to shubham;
+   ```
+4. Grant specific permissions
+   ```
+   GRANT SELECT PRIVILEGE ON DATABASE devs to shubham;
+   ```
+5. List all databases
+   ```
+   \l
+   ```
+6. Connect to the database
+   ```
+   \c devs
+   ```
+7. Drop a database
+   ```
+   DROP DATABASE devs;
+   ```
+8. Create a table
+   ```
+   CREATE TABLE COMPANY(
+       ID INT NOT NULL,
+       NAME CHAR[50],
+       AGE INT,
+       ADDRESS TEXT
+   );
+   ```
+9. View the list of all tables
+   ```
+   \d
+   ```
+10. View a specific table
+    ```
+    \d company
+    ```