Scripts: Jobs Not Executed in the Last Year / Job Activity Details

For Spanish version visit this link Scripts: Jobs no ejecutados en el último año / Actividad de Jobs Detallada
A few days ago i was looking for a script to let me know when was the last execution of a job, so I can review the jobs that were not executed in the last year and delete the ones not needed, but i couldn’t find anything valid, so i had to create one.
 I use the columns last_run_date and last_run_time from sysjobservers table to get this value, the scripts that i found on Internet used other columns from other tables which i will describe why i not chose:
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