PostgreSQL/Select Query/Query Expressions

Using expressions and constants

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postgres=# postgres=# -- Using expressions and constants postgres=# postgres=# SELECT 2 + 2, pi(), "PostgreSQL is more than a calculator!";

?column? |        pi        |               ?column?

---

+------------------+---------------------------------------

       4 | 3.14159265358979 | PostgreSQL is more than a calculator!

(1 row) postgres=#

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