Get first Sunday of next month using T-SQL

Question

Looking for a way to get the date in the format \"11/1/2009\", which would be the first sunday of next month. I want to run this query after the first sunday in october to get

Answer 1

This would be simplest with an auxiliary calendar table. See this link, for example.

However, it can be done without one, though it's rather tricky. Here I assume you want the first future date that is the first Sunday of a month. I've written this with a variable @now for - well - now, so it's easier to test. It might be possible to write more simply, but I think this has a better chance of being correct than quickly-written simpler solutions. [Corrected by adding DAY(d) < 8]

SET @now = GETDATE();
WITH Seven(i) AS (
  SELECT -1 UNION ALL SELECT 0 UNION ALL SELECT 1
            UNION ALL SELECT 3 UNION ALL SELECT 4
            UNION ALL SELECT 5 UNION ALL SELECT 6
), Candidates(d) AS (
  SELECT DATEADD(WEEK,i+DATEDIFF(WEEK,'19000107',@now),'19000107')
  FROM Seven
) 
  SELECT TOP (1) d AS SoonestFutureFirstSunday
  FROM Candidates
  WHERE DAY(d) < 8 AND MONTH(d) >= MONTH(@now)
  AND (MONTH(d) > MONTH(@now) OR DAY(d) > DAY(@now)) 
  ORDER BY d;      ORDER BY d;