Return just the last day of each month with SQL

Question

I have a table that contains multiple records for each day of the month, over a number of years. Can someone help me out in writing a query that will only return the last d

Answer 1

Use the EOMONTH() function if it's available to you (E.g. SQL Server). It returns the last date in a month given a date.

select distinct
Date 
from DateTable
Where Date = EOMONTH(Date)

Or, you can use some date math.

select distinct
Date
from DateTable
where Date = DATEADD(MONTH, DATEDIFF(MONTH, -1, Date)-1, -1)