SQL Server determine if values are monotonous -


i got table measurements, containing records. , now, need determine, if values monotonically increasing time time, decreasing or none of above.

i achieved desired result using cte expression (the code below), solution seems quite reduntant me.

is there better way determine, if field value sequence monotone, or not?

create table [dbo].[measurements](     [objectid] [int] identity(1,1) not null,     [measdate] [datetime] null,     [measvalue] [float] null ) on [primary];  declare   @objectid int = 1;  measset (   select  row_number() over(order measdate ) rownum, measvalue, measdate     dbo.measurements m       m.measdate > convert( datetime, '2013-10-02 08:13:00', 120)              , m.objectid = @objectid   )  select case when count(b.diffsign) = 1 1 else 0 end ismonotone    (     select diffsign      (     select mss.measdate , mss.measvalue, mss.measvalue- mssd.measvalue diff,      case        when mss.measvalue- mssd.measvalue null null       when mss.measvalue- mssd.measvalue= 0 null       when mss.measvalue- mssd.measvalue< 0        -1        else 1      end diffsign     measset mss     left join measset mssd        on mssd .rownum = mss.rownum - 1        )     a.diffsign not null     group a.diffsign   ) b

if don't care knowing particular records breaking monotony, use this, little more compact:

select case when count(*) = 0 1 else 0 end ismonotone (     select row_number() on (order measdate) rownum, measvalue     measurements ) t1 inner join (     select row_number() on (order measvalue) rownum, measvalue     measurements ) t2 on t1.rownum = t2.rownum t1.measvalue <> t2.measvalue

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