sql - how to create a new field to show, together with the SELECT'ed fields? -

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these code lines filter of people on 50.

select birthday table_name birthday < now() - '50 years'::interval

together this, need create additional column, shows actual age.

es.

  birthday     age  2000-06-28    16

the column "age" shall created select. not present in table.

you can use specific function called age()

select extract(year age(birth_date)) age ...

https://www.postgresql.org/docs/9.5/static/functions-datetime.html

enter image description here

enter image description here

keep in mind: age subtracts current_date (at midnight)


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