PostgresSQL数据库具有日期字段，我希望除日期列以外的所有数据仅作为年份

Question

I have data that has a date column in the full format but would like the output to only represent the year.

eg: from

SELECT * FROM tablename;

I want something like:

SELECT * FROM tablename WITH 'newdatefield' as SELECT EXTRACT(YEAR FROM TIMESTAMP 'datefield'); 

I'm not great at SQL - I remember that something like this can be done but can't find how to do it again.

Answer 1

我认为您正在考虑这一点：

SELECT EXTRACT(YEAR from datefield), The, Other, Fields, You, Want FROM tableName