how to know if postgres is installed 1

how to know if postgres is installed

write on linux cmd:

psql --version

Here is what the above code is Doing:
1. We’re importing the psycopg2 library, which is the library that we’ll use to connect to our PostgreSQL database.
2. We’re creating a connection to our database.
3. We’re creating a cursor object, which will allow us to execute SQL commands.
4. We’re executing a SQL command that will return all of the rows in the table.
5. We’re printing out the rows.

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