Working with dates in Oracle SQL

Question

I am very new when it comes to using SQL and what I am attempting to do is select the waterUsage and electrcityUsage using only the month and year and select the waterUsage and

Answer 1

One option uses TO_CHAR:

select electrcityUsage, waterUsage 
from monthlyBill
where accountNumber = '211' and
     to_char(billing_date, 'MM-YYYY') = '12-2012'

This assumes that you're actually using Oracle, and not SQL Server.

If you wanted 2012 and 2011 then just go ahead and add another condition to the WHERE clause. I might use EXTRACT in this case:

select electrcityUsage, waterUsage 
from monthlyBill
where accountNumber = '211' and
    extract(month from billingDate) = 12 and
    extract(year from billingdate) in (2011, 2012)