I have column declared
time_stamp | timestamp| NO| PRI| CURRENT_TIMESTAMP | on update CURRENT_TIMESTAMP
.
I have some old data which I would like to use for testing posrpoises. Since my applciation defaults to displaying today's data, I would like an SQL command which changes the yyyy/nn//dd part to today, while retaining the hh:mm:ss part.
As the column is of type timestamp
, I suspect I want something like
UPDATE table SET time_stamp = time_stamp + (24*60*60* (now() - timestamp))
or similar, but I am unsure of the exact command.
I can haz halp?
show create table positions;
| positions | CREATE TABLE `positions` (
`vehicle_id` int(11) NOT NULL,
`time_stamp` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
`latitude` double NOT NULL,
`longitude` double NOT NULL,
`distance_travelled` double NOT NULL,
`address` varchar(128) NOT NULL,
UNIQUE KEY `vehicle_id` (`vehicle_id`,`time_stamp`),
CONSTRAINT `positions_ibfk_1` FOREIGN KEY (`vehicle_id`) REFERENCES `vehicles` (`vehicle_id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 |
select * from positions;
| 6 | 2013-10-22 17:24:57 | 1.33793333333333 | 103.755233333333 | 8483 | Pan Island Expressway, Singapore
|
| 6 | 2013-10-22 17:29:42 | 1.35208333333333 | 103.716433333333 | 7023 | 551 Jurong West Street 42, Singapore 640551
|
| 6 | 2013-10-22 17:34:42 | 1.35188333333333 | 103.715416666667 | 149 | 542 Jurong West Avenue 1, Singapore 640542