PSQL-修改列的数据类型

Question

ALTER TABLE user_login ALTER COLUMN dob date;

psql中的此正确查询是否可以修改列的数据类型？

Answer 1

No, you need to include TYPE . It should be

ALTER TABLE user_login ALTER COLUMN dob TYPE date

See the documentation . You're probably confused with ADD COLUMN where you can omit the TYPE .