version() is a function: a name followed by () that the DBMS replaces with a value. It returns the name and version of the DBMS.

1. Which major version of PostgreSQL runs this lab? Give the first number after PostgreSQL.
2. Make the database calculate 12 times 12.
3. Think before you run it: what does SELECT 7 / 2; return? Both numbers are whole numbers.
4. Make the database return 3.5 for seven divided by two. Change one of the numbers, not the sign.