**Goal**

Pivotal Greenplum ( aka Postgres ) has a powerful utility to do simple math problem within the database. Below examples will show how this can be done.

**Solution**

Have a look at the page here for the list of operations available. Lets take a list of few operations as an example to help you understand the powerful feature.

- Addition:

gpadmin=# SELECT 1+2 AS result; result -------- 3 (1 row)

- Multiplication:

gpadmin=# SELECT 1*2 AS result; result -------- 2 (1 row)

- Division:

gpadmin=# select 20/7 as result; result -------- 2 (1 row)

- Division (with Decimals):

gpadmin=# select 20/7::float as result; result ------------------ 2.85714285714286 (1 row) - OR - gpadmin=# select 20.0/7 as result; result -------------------- 2.8571428571428571 (1 row) Time: 0.976 ms

- Fraction:

Time: 0.500 ms gpadmin=# SELECT 3! AS result; result -------- 6 (1 row)

- Square root:

gpadmin=# SELECT |/64 AS result; result -------- 8 (1 row)

- pi

gpadmin=# SELECT pi() AS result; result ------------------ 3.14159265358979 (1 row)

- tan(x)

gpadmin=# SELECT tan(45) AS result; result ------------------ 1.61977519054386 (1 row)

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