Beginning SQL

You can raise a number to any power, from 1 to whatever the database system can handle; some huge
numbers, however, will be too large for the database system to handle. For example, if you want to
know what the results are when the MemberId is squared (raised to the power of 2), cubed (raised to the
power of 3), and raised to the power of 7, you’d write the following SQL
SELECT MemberId, POWER(MemberId,2), POWER(MemberId, 3) , POWER(MemberId, 7)
FROM MemberDetails
ORDER BY MemberId;
Executing the statement gives the results in the following table:
Manipulating Data
MemberId POWER(MemberId,2) POWER(MemberId, 3) POWER(MemberId, 7)
1 1 1 1
4 16 64 16384
5 25 125 78125
6 36 216 279936
7 49 343 823543
8 64 512 2097152
9 81 729 4782969
10 100 1000 10000000
11 121 1331 19487171
12 144 1728 35831808
13 169 2197 62748517
14 196 2744 105413504
15 225 3375 170859375
For the first and second rows in the preceding table, the columns were calculated as shown in the following
table:
MemberId POWER(MemberId,2) POWER(MemberId, 3) POWER(MemberId, 7)
1 1 * 1 = 1 1 * 1 * 1 = 1 1 * 1 * 1 * 1 * 1 * 1 * 1 = 1
4 4 * 4 = 16 4 * 4 * 4 = 64 4 * 4 * 4 * 4 * 4 * 4 * 4 = 16384
Now that you’ve learned how to raise to the power of 2, you can put that in reverse and find the square
root of a number.
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