How to check date range in mssql for epoch datetime - sql-server-2008

Question

in one of the table the date column values are like below
date
25052008112228
26052008062717
table name is transaction
i tried using the below query but its throwing error
select * from transaction where date between '2012-01-06' and '2012-06-30'
select * from transaction where date between '2012/01/06' and '2012/06/30'
give me a solution.

Answer 1

The problem is that the [date] column doesn't contain a date in a format that will be automatically converted to an appropriate datetime value - it doesn't even contain a supported format value. So you're left shredding the text using string operations:
declare #Transactions table (TDate char(14))
insert into #Transactions (TDate) values
('25052008112228'),
('26052008062717')
select CONVERT(datetime,
SUBSTRING(TDate,5,4) + '-' +
SUBSTRING(TDate,3,2) + '-' +
SUBSTRING(TDate,1,2) + 'T' +
SUBSTRING(TDate,9,2) + ':' +
SUBSTRING(TDate,11,2) + ':' +
SUBSTRING(TDate,13,2))
from
#Transactions
Results:
2008-05-25 11:22:28.000
2008-05-26 06:27:17.000
You could wrap the CONVERT/SUBSTRING operations into a UDF, if you need to perform this kind of conversion often. Of course, ideal would be to change the column definition to store a genuine datetime value - almost all datetime issues arise when people treat them as text.
(Note, I've renamed both the table and the column, since using reserved words is usually a bad idea)
Your query could be something like:
;with converted as (
select *,CONVERT(datetime,
SUBSTRING([Date],5,4) + '-' +
SUBSTRING([Date],3,2) + '-' +
SUBSTRING([Date],1,2) + 'T' +
SUBSTRING([Date],9,2) + ':' +
SUBSTRING([Date],11,2) + ':' +
SUBSTRING([Date],13,2)) as GenuineDate
from [Transaction]
)
select * from converted where GenuineDate between '20120106' and '20120630'
(Note that I've also changed the date literals in the final query to a safe format also)

Answer 2

-- asp time stamp
select * from [transaction] where
cast(SUBSTRING([date],5,4) + '-' + SUBSTRING([date],3,2) + '-' +
SUBSTRING([date],1,2) + ' ' + SUBSTRING([date],9,2) +
':' + SUBSTRING([date],11,2) + ':' +
SUBSTRING([date],13,2) as datetime)
between '2008-05-26' and '2012-01-06'
-- unix epoch time
select * from [transaction] where [date]
between DATEDIFF( SECOND, '01-01-1970 00:00:00', '2012-01-06' )
and DATEDIFF( SECOND, '01-01-1970 00:00:00', '2012-06-30')