How can I alter a Mysql table time stamp to such as the following:
dd/mm/yy 00:00:00
I tried:
ALTER TABLE TbMessage MODIFY startdate TIMESTAMP DEFAULT
CURRENT_TIMESTAMP NOT NULL;
But is not the formate as i thought:
0000-00-00 00:00:00
can some one help me? Because the date which i am receiving for the table is in the format DD/MM/YYYY from a SQL Database. I cant chnage the formate in the database of SQL.
A timestamp/datetime is always stored the same way in the database. It is the representation in your selects that you can influence.
For that you can use DATE_FORMAT. Example:
select date_format(datetime_column, '%d/%m/%Y %k:%i:%s')
from your_table
And if you want to store date and time you should rather use the datetime data type. So I recommend to use
ALTER TABLE TbMessage
MODIFY `startdate` datetime DEFAULT CURRENT_TIMESTAMP NOT NULL
Related
mysql>create table login_log (login_log_id int(11),username varchar(20), login_date timestamp default current_timestamp)
how to include local timezone details for the login_date column as a default value so that whenever i insert a row in that table, timestamp along with timezone should be stored.
like this dd/MM/yyyy hh:mm:ss TZhh:TZmm
Select change in date
Edit your date column in your database and change the default to CURRENT_TIMESTAMP.
This should do the trick.
I have a database with 6k+ rows and don't want to have to manually convert each date to DATETIME, they are currently in varchar.
They are in the UK format, DD/MM/YYYY.
Currently the date is in a column named datetime which is varchar(12)
I want to convert it to a datetime column named date_new.
How can I do this using an SQL statement
Solved using
UPDATE table SET date_test = STR_TO_DATE( DATETIME, '%d/%m/%Y' )
Is there any way to create a table with a specific TIMESTAMP format (HH:mm:00) where I need to fix sec to 00.
CREATE TABLE `published` (
`time_pub` timestamp() NULL DEFAULT NULL,
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
You can't change the way the timestamp is stored. Only the way it is presented in your select statements.
Another solution would be to store the data in a hour and minute column having an integer data type.
Although you can't specify the time format when create table, you can use date_format function in MySQL to fix the second part to 00 when insert data to database.
insert into TABLE_NAME values (date_format(now(), '%H:%m:00'));
My requirement is I want to Set the time user not enter time,in the column time ....
Date which is user enter one...both combination i Want to set in Some filed Name "StartDate" type is DATETIME =2013-04-27 20:00:00 like this
But 20:00:00 not enter by the user by default i want to set this time, as select time(now()) .
You cannot do it with DATE/DATETIME fields, because DEFAULT clause does not support using functions like NOW(). But you could create a trigger to set current date/time field value if it is NULL.
As a workaround, try to use TIMESTAMP field, it supports DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, which will help you to set default date/time. More information - Automatic Initialization and Updating for TIMESTAMP
I am going to create a table with a column storing Created_date which is of datetime datatype. And my aim is to set its default value as sysdate().
I tried
CREATE TABLE tbl_table (
created_date datetime DEFAULT sysdate())
This gives me error saying not a valid default statement. I used similar logic in Oracle.
Please help me to resolve this.
Thanks in advance.
Try
CREATE TABLE tbl_table ( created_date TIMESTAMP DEFAULT NOW())
But: NOW is different from sysdate and TIMESTAMP is different from datetime, keep this in mind.
Normaly you only can use constants for default-values. TIMESTAMP is the only column-type which supports a function like NOW(). See here for further information on the MySQL Bugtracker.
CREATE TABLE tbl_table(
created_datetime DATETIME DEFAULT CURRENT_TIMESTAMP,
modified_datetime DATETIME ON UPDATE CURRENT_TIMESTAMP
)
Should do the trick.