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SQL-stmt

Have a View with fields:

ID (PK)
Date_Field (Date)
Date_Month (Extracts the month from above date)
Date_Yr (Extracts the year from above date)
Amt

The data is collected on a monthly basis, also the data might miss for some months.

I want to write a sql that for a given year gives me the latest data for that year.

ie, lets say data was collected for Jan, Feb, May for 2001

If the sql was ran today the output would be May's value (ie. the data was recorded in May for yr-2001)
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debbie790
Asked:
debbie790
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1 Solution
 
UncleMattCommented:
Select * from view where Date_yr = Year(getdate()) and date_month = (Select max(date_month) from view where Date_yr = Year(getdate()))

It's probably not the best way to do it but it should work!

Matt.
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ibroCommented:
Select * from myview where Date_field=( select max(Date_field) from myview)

Can you have more than 1 record with the same date? If not the above will do your work.
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debbie790Author Commented:
Firstly, it is not possible to have > 1 record with the same date.

Also, the above solutions didnt work:

myView:
ID (PK)
DeptID
Date_Field (Date)
Date_Month (Extracts the month from above date)
Date_Yr (Extracts the year from above date)
Amt

SELECT * FROM myView
WHERE DateField = ( SELECT MAX(Date_field) FROM myview WHERE DeptID = 100)

The above gave me all records -- repeating them 3-times.

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ibroCommented:
Hi debbie790,
 As far as I understand your explanation [it is not possible to have > 1 record with the same date], it seems that data field is unique in the myView. Is this true.
If it is, then the statement will give you only one record, which will be the recent one.
There is probable something that you didnt mention...
Since the above query doesnt work for you, what is your unique value? Is it DeptID+Date_field. If it is the statement shall look like this:

SELECT * FROM myView
WHERE DepID=100 and DateField = ( SELECT MAX(Date_field) FROM myView WHERE DeptID = 100)

Btw is your SQL7 configured as case-sensitive or case-insensitive? Are "myView" and "myview" same views or different? [in your statemnt in main query is "myView" and in subquery "myview"]


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UncleMattCommented:
What format is date_month?

Is it the numeric month value?

If so, what was the problem with my solution?
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arak_69Commented:
Select *
From MyView
Where Date_Field =
        (SELECT Max(Date_Field )
         FROM MyView
         WHERE Date_Yr  = My_Year)

It will return you only records for last date for given year in that database

If You Need it For whole Month
Select *
From MyView
Where Date_Month =
        (SELECT Max(Date_Month )
         FROM MyView
         WHERE Date_Yr  = My_Year)
AND Date_Yr  = My_Year


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arak_69Commented:
Select *
From MyView
Where Date_Field =
       (SELECT Max(Date_Field )
        FROM MyView
        WHERE Date_Yr  = My_Year)

It will return you only records for last date for given year in that database

If You Need it For whole Month
Select *
From MyView
Where Date_Month =
       (SELECT Max(Date_Month )
        FROM MyView
        WHERE Date_Yr  = My_Year)
AND Date_Yr  = My_Year
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