Compare time stamps in MSSQL

1. I have to compare a timestamp field against a static (hardcoded time stamp) . Can u please advice.
eg Timestamp_fied > '2009-03-22 00:00:00.000'  sometin lik this but i don get the correct values.

2. I also would like to dynamically compare the same timestamp field againsnt the current timestamp minus n days
eg Timestamp_fied > current_timestamp-1 ,sometin lik this but i don get the correct values.
FranklinRaj22Asked:
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csenasaConnect With a Mentor Commented:
Hi
U can use system functions like Dateadd() and DateDiff()
SELECT DATEADD(day, 3, GETDATE());
 
GO
SELECT DATEADD(day, 3, DueDate)
FROM Sales.SalesOrderHeader;
GO
 
SELECT interval = DATEDIFF(month,  'Nov 30 2001' , GETDATE())
 
GO
SELECT interval = DATEDIFF(month, DueDate, 'Nov 30 2001')
FROM Sales.SalesOrderHeade

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Chris LuttrellSenior Database ArchitectCommented:
If you are refering to a column with the DATA_TYPE of TIMESTAMP then it is not a date value.  See http://msdn.microsoft.com/en-us/library/ms182776(SQL.90).aspx for more details on TIMESTAMP.  Comparing your string to a column of type DATETIME works for me so your problem must be TIMESTAMP.
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tl121000Commented:
How about casting the static timestamp in question?
SELECT *
where timestamp_field > CAST('2009-03-22 00:00:00.000'  AS TIMESTAMP(0) FORMAT 'DD/MM/YYYYBHH:MI:SS');

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csenasaCommented:
Hi,
U can perform mathematical operations on Timesatmp in MSSQL.

Adding dates and subtracting dates can be achieved like simple addition.
< , > <= , >= and != can be use for comparinson also.

select Current_TIMESTAMP - 1
select Current_TIMESTAMP - 1 day
select Current_TIMESTAMP +  10 day
select Current_TIMESTAMP - 1 month
 
 
SELECT * FROM
NyTable WHERE MyDate > = GETDATE()
 
SELECT * FROM
NyTable WHERE MyDate > = Current_TIMESTAMP - 1 month

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FranklinRaj22Author Commented:
ok
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Chris LuttrellSenior Database ArchitectCommented:
ok?  What does that mean after all this time?  Did one of the comments help you, if so please reward that answer.  If you still have problems or questions let us know so we can try to help.
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