tsql - How Do I Find the last value for each row in SQL Server 2008? -


sql server 2008, can see in data program have actual date or null (program still open).

i want row last value (whether date or null) each program every program in resultset.

here sample of data:

    rownum programkey pgmstartdate pgmenddate     ------------------------------------------     2      1014       4/1/2005     2/28/2017     4      1014       3/1/2017     null     5      1015       3/1/2017     null     3      1015       4/1/2005     2/28/2017     6      1262       7/1/2017     null     1      1262       1/1/2012     6/30/2017

i have tried top 1 returns 1 row entire resultset.

i have tried max(pgmenddate) again returns 1 row entire resultset.

last_value works in sql server 2012 , newer configuration sql server 2008 , remain so.

thanks in advance

how 

select max(pgmenddate), programkey table group programkey

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