sql server - MS SQL query to calculate link outage time and link up time -


following table, top few lines operational status of device, every poll:

samplevalue = 2 operational status down, samplevalue = 1 operational status up

source          target                                              sampletime      samplevalue ------------------------------------------------------------------------------------------------ 128.42.196.11   se2/0/2(serial2/0/2)                                9/30/15 11:10   2 128.42.196.11   fa3/0/0(fastethernet3/0/0)                          9/30/15 11:10   1 128.42.196.11   gi1/0/0.10(gigabitethernet1/0/0.10)                 9/30/15 11:10   1 128.42.196.11   se2/0/2.305(serial2/0/2.305)                        9/30/15 11:10   2 128.42.196.11   se2/0/2.309(serial2/0/2.309)                        9/30/15 11:10   2 128.42.196.11   gi1/0/0.20(gigabitethernet1/0/0.20)                 9/30/15 11:10   1 128.42.196.11   se2/0/2.300(serial2/0/2.300)                        9/30/15 11:10   2 128.42.196.11   gi0/0/0(gigabitethernet0/0/0)                       9/30/15 11:10   1 128.42.196.11   se2/0/2.306(serial2/0/2.306)                        9/30/15 11:10   2 128.42.196.11   po2/1/0(pos2/1/0--sonet/sdh medium/section/line)    9/30/15 11:09   2 128.42.196.11   tu10(tunnel10-mpls layer)                           9/30/15 11:09   2 128.42.196.11   tu4(tunnel4)                                        9/30/15 11:09   2 128.42.196.11   gi1/0/0.40(gigabitethernet1/0/0.40)                 9/30/15 11:09   1 128.42.196.11   se2/0/1(serial2/0/1)                                9/30/15 11:09   1 128.42.196.11   gi1/0/0.20(gigabitethernet1/0/0.20)                 9/30/15 11:09   1 128.42.196.11   tu10(tunnel10)                                      9/30/15 11:08   2 128.42.196.11   se2/0/0(serial2/0/0)                                9/30/15 11:08   1 128.42.196.11   se2/0/2.309(serial2/0/2.309)                        9/30/15 11:08   2 128.42.196.11   se2/0/2.306(serial2/0/2.306)                        9/30/15 11:08   2

from above table have calculate how time particular interface of device sampletime = 1 , sampletime = 2 , latest condition of interface.

i able work on following query:

with temp (      select          p.source,          p.target,          p.samplevalue,         p.sampletime,         lag(p.samplevalue,1) on (order p.source, p.target, p.sampletime desc) newvalue,         lag(p.sampletime,1) on (order p.source, p.target, p.sampletime desc) changedat      interface_operstatus p  ) select *  from(      select         row_number() on (partition source, target order source, target, changedat desc) therow,         source,         target,         samplevalue oldvalue,         newvalue,         changedat,         datediff(minute,changedat,getdate()) time     temp               newvalue <> samplevalue         , newvalue = 2 )  therow >= 1

problem above query is:

  1. even though link up, shows still in outage
  2. not able consider latest link condition
  3. need outage time between link down , link (not able consider link up)

the following tested against oracle database since did not ready access ms-sql:

select source, target, sum(up_time) up_time, sum(down_time) down_time  (   select lo.*, (sample_time - previous_sample_time) * 24 * 60  actual_time,       case sample_value when 1 ((sample_time - previous_sample_time) * 24 * 60) else 0 end up_time,      case sample_value when 2 ((sample_time - previous_sample_time) * 24 * 60) else 0 end down_time              (          select source, target, sample_value, sample_time,            lag(sample_time, 1, null) on (partition source,target order source, target, sample_time) previous_sample_time           interface_operstatus        ) lo ) group source, target order source, target;

the above query should work on ms-sql little syntax changes since did not make use of oracle features.


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