Mathematical operator symbols - Amazon Redshift

Mathematical operator symbols

The following table lists the supported mathematical operators.

Supported operators

Operator Description Example Result
+ addition 2 + 3 5
- subtraction 2 - 3 -1
* multiplication 2 * 3 6
/ division 4 / 2 2
% modulo 5 % 4 1
^ exponentiation 2.0 ^ 3.0 8
|/ square root | / 25.0 5
||/ cube root || / 27.0 3
@ absolute value @ -5.0 5
<< bitwise shift left 1 << 4 16
>> bitwise shift right 8 >> 2 2
& bitwise and 8 & 2 0

Examples

The following examples use the TICKIT sample database. For more information, see Sample database.

To calculate the commission paid plus a $2.00 handling for a given transaction, use the following example.

SELECT commission, (commission + 2.00) AS comm FROM sales WHERE salesid = 10000; +------------+-------+ | commission | comm | +------------+-------+ | 28.05 | 30.05 | +------------+-------+

To calculate 20 percent of the sales price for a given transaction, use the following example.

SELECT pricepaid, (pricepaid * .20) as twentypct FROM sales WHERE salesid=10000; +-----------+-----------+ | pricepaid | twentypct | +-----------+-----------+ | 187 | 37.4 | +-----------+-----------+

To forecast ticket sales based on a continuous growth pattern, use the following example. In this example, the subquery returns the number of tickets sold in 2008. That result is multiplied exponentially by a continuous growth rate of 5% over 10 years.

SELECT (SELECT SUM(qtysold) FROM sales, date WHERE sales.dateid=date.dateid AND year=2008)^((5::float/100)*10) AS qty10years; +------------------+ | qty10years | +------------------+ | 587.664019657491 | +------------------+

To find the total price paid and commission for sales with a date ID that is greater than or equal to 2000, use the following example. Then subtract the total commission from the total price paid.

SELECT SUM(pricepaid) AS sum_price, dateid, SUM(commission) AS sum_comm, (SUM(pricepaid) - SUM(commission)) AS value FROM sales WHERE dateid >= 2000 GROUP BY dateid ORDER BY dateid LIMIT 10; +-----------+--------+----------+-----------+ | sum_price | dateid | sum_comm | value | +-----------+--------+----------+-----------+ | 305885 | 2000 | 45882.75 | 260002.25 | | 316037 | 2001 | 47405.55 | 268631.45 | | 358571 | 2002 | 53785.65 | 304785.35 | | 366033 | 2003 | 54904.95 | 311128.05 | | 307592 | 2004 | 46138.8 | 261453.2 | | 333484 | 2005 | 50022.6 | 283461.4 | | 317670 | 2006 | 47650.5 | 270019.5 | | 351031 | 2007 | 52654.65 | 298376.35 | | 313359 | 2008 | 47003.85 | 266355.15 | | 323675 | 2009 | 48551.25 | 275123.75 | +-----------+--------+----------+-----------+