PostgreSQL Subtract exactly a year from a date field PSQL -


i tried sql subtract year syntax in psql didn't work. in case dates imported 2 digit years have birthdays off 1900 years.

update patients set birthday = dateadd(year, 100, getdate(birthday)

throws:

error:  syntax error @ or near "table" line 1: update table set datefield = date_add(datefield, interval 1 ...

this works in postgresql using interval , passing in string of increment values , type (seconds, minutes, hours, days, months, years) etc.

update patients set birthday = birthday + interval '1900 years';

found idea here https://www.postgresql.org/docs/9.1/static/functions-datetime.html


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