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' )
Related
have a string field in DB which I need to convert to datetime, my problem is I need to convert date format from 03/01/2019 11:30 to 2011-01-26 14:30:00. I can do it with an individual record, but can't figure out how to convert all the records in the table.
I followed the advice here
but, all converted dates are 0000-00-00 00:00:00 presumably because mysql not able to guess input date format.
create table wms_lw.wms_lw (
site_id int null,
name varchar(255) null,
site varchar(255) null,
date varchar(255) null,
new_date datetime not null,
value double null,
date_2 varchar(255) null
);
You can convert your string in date as
select str_to_date('03/01/2019 11:30', '%d/%m/%Y %i:%s')
so from your table
select str_to_date(my_col, '%d/%m/%Y %i:%s') from my_table
once you have a date you can format as you prefer wit date_format() or add the datte time using date_Add()
I have a table called 'products' with some columns. One of them is called 'date' and should contain the date on which the product was added as Unix time stamp. Normally I would use the NOW() function but since the value needs to be an integer and I can't cast the NOW() function as integer, I need to find another way. Any ideas ?
Modify the column to be of type TIMESTAMP and set it's default value (if you want to set the column to the date it was added on) to CURRENT_TIMESTAMP.
ALTER TABLE `products` MODIFY `date` TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL;
TIMESTAMP is not a string but an integer timestamp, it is just displayed as a string and you can use operators on it.
With DEFAULT CURRENT_TIMESTAMP you don't need to insert the date, mysql will do it for you.
MySQL has a function with the surprising name unix_timestamp:
INSERT INTO `products`
(`name`, `date`)
VALUES ('some name', UNIX_TIMESTAMP())
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
I am familiar with DATE_FORMAT function which can display the the record from my date field in the format specified. However, I would like to create a table with a date field that only accepts my format.
Here's what I have done so far:
CREATE TABLE test_table (
id INT AUTO_INCREMENT,
f_name VARCHAR(40) NOT NULL,
l_name VARCHAR(25) NOT NULL,
date_hired DATE NOT NULL
);
Inserting a record with a date_hired value of '2013-03-01' will be inserted as '1/03/2013 12:00:00 AM' which is far from my expected result (I would like the format the way it was inserted). Any feedback? Did I miss something?
Thanks,
Michael
You can't change the format during table create, you can change the format of date for displaying user by using you programming logic like if you are using PHP as your server side language the you can convert it your desired format.
I have a MySQL table with Datetime as a column in varchar(50) data type containing timestamp in this format dd/mm/yyyy 00:00:00.000, now this is to be converted to MySQL timestamp... how do we do that?
I would
add a new column to hold the real timestamp
use an update statement to populate the new column from the varchar column, using the STR_TO_DATE function
remove the varchar column
rename the new column