如何从 mysql 中的时间戳中减去 1 天

Question

I am trying to subtract 1 day:

select updt_dttm - 1 day from hstry where roll="X34" ;

Expected: If updt_dttm is 2020-01-07 04:21:40.982202 , my query should return 2020-01-06 04:21:40.982202

Answer 1

select (updt_dttm  - INTERVAL 1 DAY) as date from hstry where roll="X34" ;

Answer 2

Have you tried DATE_SUB()?

DATE_SUB($thedateyouchoose, INTERVAL 1 DAY)