Selection

Inspections for the year 2000.

 

Period= 2000 (Inspection)

Inspection RegNo DateInspected Period Evaluation
  ABC123 2000-01-03 2000 OK
ABC123 1999-01-15 1999 OK
DFG456 2000-12-04 2000 FAIL
HIK123 2000-10-20 2000 OK
TOP111 2000-05-11 2000 OK

 

Relation Inspection will be scanned and the value of attribute Period is compared to value 2000. In the first tuple the values are equal and the selection condition is true. This tuple is appended into the result.
Inspection RegNo DateInspected Period Evaluation
  ABC123 2000-01-03 2000 OK

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