I have a table matches
with a column deleted_date
which is of type date, so its values look like 2020-12-30
right now. I want to change the type of this column from date to int so I can store unix timestamps instead.
I am trying to do so by running this command:
ALTER TABLE matches ALTER COLUMN deleted_date TYPE INT USING deleted_date::INT;
But running this command gives me the error:
error: cannot cast type date to integer
Is there a way I can tell POSTGRESQL to just replace any deleted_by date values with a new empty 'null' integer var?
If you want to store a timestamp (date + time) you should convert the column to a timestamp
or even better timestamptz
type - do not use integers to store timestamps.
alter table matches alter deleted_date type timestamp
You can try below alter statement for your requirement:
ALTER TABLE matches ALTER COLUMN deleted_date TYPE INT USING extract(epoch from deleted_date)::INT;
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.