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    <pre><code>SELECT * FROM tasks LEFT JOIN plans ON plans.task_id = tasks.id WHERE plan.week IS NULL OR (plan.week &lt; DATEPART(week, GetDate()) AND plan.Year = YEAR(GETDATE()) </code></pre> <p>You should not use <code>SELECT *</code>, explicitly write out each column you need. You didn't mention if you had a year column as well, you'll have to handle the week number and the year. If you just handle the week # you'll get results across multiple years.</p> <p>It sounds like you can just use task description??? Why are you basing it on the week column if you can use the task description?</p> <pre><code>SELECT * FROM tasks LEFT JOIN plans ON plans.task_id = tasks.id WHERE tasks.description = 'Past' OR tasks.description = 'Not planned' </code></pre> <p>Aha I understand your data now, you could have multiple tasks but on different week numbers. This is simple, just use a query to find the MAX(Week#) GROUP BY the task and then perform the query, Ill write it up give me a minute...</p> <pre><code> CREATE TABLE #MyTest ( TaskID int, TaskYear int, TaskWeek int ) INSERT INTO #MyTest(TaskID,TaskYear,TaskWeek) VALUES (1, 2012, 4) INSERT INTO #MyTest(TaskID,TaskYear,TaskWeek) VALUES (2, 2012, 5) INSERT INTO #MyTest(TaskID,TaskYear,TaskWeek) VALUES (2, 2012, 36) INSERT INTO #MyTest(TaskID,TaskYear,TaskWeek) VALUES (3, 2012, 36) INSERT INTO #MyTest(TaskID,TaskYear,TaskWeek) VALUES (4, 2012, NULL) INSERT INTO #MyTest(TaskID,TaskYear,TaskWeek) VALUES (6, 2011, 5) INSERT INTO #MyTest(TaskID,TaskYear,TaskWeek) VALUES (6, 2010, 36) SELECT TaskID, MAX(TaskWeek) AS WeekNumber, TaskYear FROM #MyTest GROUP BY TaskID, TaskWeek, TaskYear HAVING MAX(TaskWeek) &lt; DatePart(week, GetDate()) OR MIN(TaskWeek) IS NULL DROP TABLE #MyTest </code></pre> <p>This will now give you unique rows for each <code>task.id</code> with the max week number.</p> <h1>Final Result</h1> <p>Based on your final comments:</p> <p>Copy and paste this into sql management studio, I have commented it for you:</p> <pre><code>CREATE TABLE #MyTest ( TaskID int, TaskDate datetime ) --test for only in the past NOTHING in the future INSERT INTO #MyTest(TaskID, TaskDate) VALUES (1, '1998-01-01') --test for planned in the future NOTHING in the past INSERT INTO #MyTest(TaskID,TaskDate) VALUES (3, '2012-12-24') --test for no plan as all (IS NULL) INSERT INTO #MyTest(TaskID,TaskDate) VALUES (4, null) --test for planned in the past but has an upcoming event in the future INSERT INTO #MyTest(TaskID,TaskDate) VALUES (6, '2011-12-23') INSERT INTO #MyTest(TaskID,TaskDate) VALUES (6, '2012-12-23') INSERT INTO #MyTest(TaskID,TaskDate) --test for planned in the past, NO upcoming event in the future VALUES (8, '2012-1-23') INSERT INTO #MyTest(TaskID,TaskDate) VALUES (8, '2012-6-23') --result should show: -- task id = 1 (because of: performed in past but nothing in the future) -- task id = 4 (because of: no plan at all) -- task id = 8 (because of: only past) SELECT TaskID, YEAR(TaskDate) AS TheYear, DatePart(week, TaskDate) AS WeekNumber FROM #MyTest WHERE --handle no planning of a task... ((TaskDate IS NULL) --eliminate any task id that is out in the future OR TaskID NOT IN (SELECT TaskID FROM #MyTest WHERE TaskDate &gt; GetDate())) GROUP BY TaskID, Year(TaskDate), DatePart(week, TaskDate) DROP TABLE #MyTest </code></pre>
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    1. CO`by looking at plan.week`
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    2. CORight what does that mean? What is plan.week ?
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    3. COThis will not yield the result I'm after. It will return task 1, 2 and 4. I just want 1 and 4.
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