Elapsed time is literally that. It's the actual, real time that elapsed while the query was running. Measured by taking the actual real time that the query started, the actual, real time that the query finished and taking the difference.
If a query started executing at 10:00:02 and completed at 10:00:05, then it took 3 seconds to run, the elapsed time is 3 seconds. If that query paralleled 4 ways (ran on 4 CPUs) for all 3 of those seconds, then the total CPU time used by that query was 12 seconds
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)SQL In The Wild
: Discussions on DB performance with occasional diversions into recoverability
We walk in the dark places no others will enter
We stand on the bridge and no one may pass