Query - show records where a date field is this week

I need to query to return all records where [completed date] was this week...

Also, i need to do the same for month
vbnetcoderAsked:
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Vitor MontalvãoConnect With a Mentor MSSQL Senior EngineerCommented:
If you don't have any index on the [completed date] column you can use the DATEPART function. It's more easy for read:
-- Select records within same week
SELECT *
FROM YourTableName
WHERE DATEPART(week, [completed date]) = DATEPART(week, GETDATE())

-- Select records within same month
SELECT *
FROM YourTableName
WHERE DATEPART(month, [completed date]) = DATEPART(month, GETDATE())

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NOTE: You need to check what's the weekday set as first day of week. For that run this command: SELECT @@DATEFIRST (1-Monday, ..., 7-Sunday)
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Scott PletcherSenior DBACommented:
This month:

WHERE [completed date] >= DATEADD(MONTH, DATEDIFF(MONTH, 0, GETDATE()), 0) AND
    [completed date] < DATEADD(MONTH, DATEDIFF(MONTH, 0, GETDATE()) + 1, 0)

This week is very similar but depends on how you define a week - what day does your week start on?
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vbnetcoderAuthor Commented:
I think week is going to be Sunday --> Saturday ...ie just a normal week
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vbnetcoderAuthor Commented:
could you give me that query too so i don't mess it up?
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Scott PletcherSenior DBACommented:
WHERE [completed date] >= DATEADD(DAY, -DATEDIFF(DAY, 6, DATEADD(DAY, DATEDIFF(DAY, 0, GETDATE()), 0)) % 7,DATEADD(DAY, DATEDIFF(DAY, 0, GETDATE()), 0))
    AND [completed date] < DATEADD(DAY, -DATEDIFF(DAY, 6, DATEADD(DAY, DATEDIFF(DAY, 0, GETDATE()), 0)) % 7 + 7,DATEADD(DAY, DATEDIFF(DAY, 0, GETDATE()), 0))

You can simplify it if you add a variable for the current day with time stripped.


DECLARE @today_midnight datetime
SET @today_midnight = DATEADD(DAY, DATEDIFF(DAY, 0, GETDATE()), 0)

WHERE [completed date] >= DATEADD(DAY, -DATEDIFF(DAY, 6, @today_midnight) % 7, @today_midnight) AND
    [completed date] < DATEADD(DAY, -DATEDIFF(DAY, 6, @today_midnight) % 7 + 7, @today_midnight)
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Scott PletcherSenior DBACommented:
Similarly, for the month:

DECLARE @start_of_month_midnight
SET @start_of_month_midnight = DATEADD(MONTH, DATEDIFF(MONTH, 0, GETDATE()), 0)

...
WHERE [completed date] >= @start_of_month_midnight AND
     [completed date] < DATEADD(MONTH, 1, @start_of_month_midnight)
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Scott PletcherSenior DBACommented:
>> If you don't have any index on the [completed date] column <<

But an index could be added next week.  It's very poor practice to deliberately exclude indexes from consideration, particularly due to lazy coding.

You really should always avoid using functions on table columns in a WHERE or JOIN whenever possible.  One, ISNULL, should never be used in a WHERE or JOIN, because it can always be easily coded around.

But, if you do use the month,  you need to include a year check for accuracy, or you'd get every year's rows from the table.
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Vitor MontalvãoMSSQL Senior EngineerCommented:
But, if you do use the month,  you need to include a year check for accuracy, or you'd get every year's rows from the table.
Yes, that's true. I've missed the year in my suggested solution.
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vbnetcoderAuthor Commented:
ty
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