How to Use Top Date in asp.net

I am building a web app, where the requirement is to make a form in which admin will be adidng information 3 times a day and the front user willl be reading from this Gridview. I was going to use only one Gridview with update fields, but they want to run a report every month will all entered ata

So I build a separate page for user and admin, and thought i used insert command  , plus a timestamp fiedl, so the idea is to pull only the data entered on that same day they are opening the document, in other words only view the last update data not the whole data from the table?

Much help is appreciated
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TonyRebaAsked:
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himanshutConnect With a Mentor Commented:
select * from tablename
WHERE DATEDIFF(day, tablename.datetime_col, GETDATE()) = 0
order by tablename.datetime_col DESC

in this where condition, it takes the the datetime from your table and gets the difference from CURRENTDATE i.e. GETDATE() ,
where ever it has difference as 0 i.e. 2011-03-08  MINUS 2011-03-08 will be ZERO :-
it will display those records

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himanshutCommented:
based on whtever is your columnname and tablename:

select TOP 1 * from tablename
order by timestamp_col DESC

this will give you only 1 record with the very latest time in your timestamp column

Cheers!
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TonyRebaAuthor Commented:
actually my table looks like this


Id, DateTime, Col1, COl2 Col3, Col4


So it will be populated everyday , and I am trying to find the way to pull all columns but only the latest values (could be 10 values) on the day they are opening the Read only GridView, any more suggestions....
Thanks
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PagodNaUtakCommented:
select TOP 10 * from tablename
order by  DateTime
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TonyRebaAuthor Commented:
Can I use top without specifyng the number of records? 10 was only a say, but I could be any number of rows inserted on a day and the system must pull all of that day

e.g.
 03/03/2011    value1 value2 value3NO
03/03/2011    value1 value2 value3NO
03/03/2011    value1 value2 value3NO

03/04/2011    value1 value2 value3            YES
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himanshutCommented:
nope,

top has to be used with some number.

Instead you can specific the current date which will pull up everything for that particular day.
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himanshutCommented:
ideally,

select * from tablename
WHERE DATEDIFF(day, tablename.datetime_col, GETDATE()) = 0

should do the job for you.

Cheers!
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TonyRebaAuthor Commented:
so only select where date currentdate()??

how do i syntax this?
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TonyRebaAuthor Commented:
great will try tomorrow, so, in this case should I stick with date only or date and time to make it more accurate? how would this be?


this is the code that feeds my date time column in the database

dateLabel.Text = DateTime.Now.ToString("dddd, dd MMMM yyyy HH:mm");
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himanshutCommented:
well if you put in date it will start from very first millisecond of that day till the latest record you have for that date
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TonyRebaAuthor Commented:
oh one more concern, so the admin will be updating, lets say like a hotel, that you need to show available rooms, so if  room status was occupied , and the latest status is available I want only show that status,,,,,, sorry I totally forgot this, so I am thinking a mix of Top and Date statement??
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TonyRebaAuthor Commented:
select TOP 1 * from tablename
WHERE DATEDIFF(day, tablename.datetime_col, GETDATE()) = 0
order by tablename.datetime_col DESC


????
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himanshutCommented:
I didnt get you this comment

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oh one more concern, so the admin will be updating, lets say like a hotel, that you need to show available rooms, so if  room status was occupied , and the latest status is available I want only show that status,,,,,, sorry I totally forgot this, so I am thinking a mix of Top and Date statement??
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TonyRebaAuthor Commented:
There is two pages on the site, one for users , and one for administrator

the admin will be entering the room and the availability several times a day, so the users should see only the last entered information for each room,  (status).  

Also this have to show the data for that day , since the room had other statuses a day before ,,,,
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