如何使用SQL查询仅更新日期时间数据类型中的年份（yyyy）？ 没有日期添加功能

Question

I have

2006-01-01 20:00:00.000
2006-01-01 20:01:00.000
2006-01-01 20:02:00.000
2006-01-01 20:03:00.000
2006-01-01 20:04:00.000
2006-01-01 20:01:00.000
2006-01-01 20:01:00.000
2006-01-01 20:01:00.000

and I want

2004-01-01 20:00:00.000
2004-01-01 20:01:00.000
2004-01-01 20:02:00.000
2004-01-01 20:03:00.000
2004-01-01 20:04:00.000
2004-01-01 20:01:00.000
2004-01-01 20:01:00.000
2004-01-01 20:01:00.000

Answer 1

UPDATE table_name
SET col_date=DATE_FORMAT(col_date,'2004-%m-%d');

Answer 2

for changing only year:

UPDATE table_name
SET date_col=DATE_FORMAT(date_col,'2004-%m-%d');