I am new to Cassandra cql (cqlsh 4.1.1, Cassandra 2.0.8.39, CQL spec 3.1.1, Thrift protocol 19.39.0) - using the cql COPY command to a table from a CSV formatted file and I get the following error: Bad Request: unable to coerce '2012/11/11' to a formatted date (long). How do I change a column using cql so that it accepts the date from my CSV file?
as Brian said, there are CQL timestamp type to follow to get CQL query running. Sometimes it looks like quite weird indeed ! I've got the same issue few weeks ago with a date time insert like this one :
INSERT INTO my_table (id,lastvisitdate) VALUES (1682221,'2012-03-25 02:26:04');
I got this error : Bad Request: unable to coerce '2012-03-25 02:26:04' to a formatted date (long) ! mmmm... so bad as the date time seems to be correct !
After many tries and before going nuts, I've just added a Z at the end of the time, Z stands for Zulu time which is also UTC and GMT :
INSERT INTO my_table (id,lastvisitdate) VALUES (1682221,'2012-03-25 02:26:04Z');
Yessss ! It works ! So do not forget the timezone in your date time values, it could be helpful ! ;-)
There is not a direct way to do that from within CQLSH.
There are a certain set of string date formats which can be coerced. See the CQL Timestamp type documentation page for some examples like:
yyyy-mm-dd HH:mm
yyyy-mm-dd HH:mm:ss
yyyy-mm-dd HH:mmZ
yyyy-mm-dd HH:mm:ssZ
yyyy-mm-dd'T'HH:mm
yyyy-mm-dd'T'HH:mmZ
yyyy-mm-dd'T'HH:mm:ss
yyyy-mm-dd'T'HH:mm:ssZ
yyyy-mm-dd
yyyy-mm-ddZ
As a workaround you could modify your CSV file to adjust the date format, then import it. (In your case it may be as simple as "yyyy/mm/dd" -> "yyyy-mm-dd".)
Related
I have a large dataset with employees' time entries. The current date format is MM/dd/yyyy. However, I need to convert all the dates into yyyy-MM-dd format.
I have tried the following:
Update human_resources.timekeeping
Set Actual_Date = str_to_date(Actual_Date,'%d-%m-%Y');
Got the errror messsage Error Code: 1411. Incorrect datetime value: '' for function str_to_date.
My SQL version is 5.7.18-log.
I tried to view SQL mode using SELECT ##sql_mode; and I got NO ENGINE SUBSTITUTION.
I have tried to retrieve the value like shown below and it was working fine.
Converting varchar mm/dd/yy to date format yyyy-mm-dd
However, updating the data would not work. I need to update the actual records, not insert new records.
Hope someone can help me regarding this. Thank you in advance!
EDIT: The data type for Actual_Date is VARCHAR.
Apologies if my explanation may be a bit confusing. But I am using this data set to display and filter time entries in a gridview. When I am filtering dates, say for example (01/15/2022-01/25/2022), data from 2021 is also being displayed. When I tried to manually change the format of some of my data in sql to yyyy-MM-dd, my code seemed to be working fine. The problem is there are a lot of data in this table, which is why manually updating the format is impossible. What is the first thing that I need to do? I'm sorry this is all still a bit confusing for me.
My apologies if you have already taken the following things into consideration but I thought them worth mentioning.
Given that you say this is a "large dataset" I assume this is a table that is currently in use. Does the existing application rely on the Actual_Date being in that string format? Does it rely on a fixed number of columns in the table? Some poorly written applications can be very brittle when it comes to changing underlying data structure.
You may want to consider creating a copy of the current table, modifying the structure of the copy, and replacing the original with a view with the same columns and formats as the original. This way you get improved data but reduce risk to existing application.
In the title and first line of your question you state that the current format is MM/dd/yyyy
Update human_resources.timekeeping Set Actual_Date = str_to_date(Actual_Date,'%m/%d/%Y');
Your separator is / not -
%d-%m-%Y >> %d/%m/%Y
Been searching for ages to try and find an answer for this but got no luck.
I have a column with a Datetime type. I have a field on a webpage which has an input control which puts the date in this format 20-12-2015 23:30 .When I try and store this I just get blank entries or 0000-00-00 00:00:000
The field likes the date in this format 2015-20-12 23:15:00
Can anybody help me please help me work out how to convert this correctly. I have been trying with several Date_Format methods but all give me an error
"1292 Incorrect datetime value: '10/12/2015 10:50'"
If you have a fixed format date being returned from the page that is not a compatible date, and you cannot change the format used on the page, then before you attempt to store it on the database you need to convert it to a compatible format.
PHP has a DateTime object that does exactly this
<?php
$in = '20-12-2015 23:30';
$date = DateTime::createFromFormat('d-m-Y H:i', $in);
$to_db_date = $date->format('Y-m-d H:i:s');
echo $to_db_date;
This produces a MySQL compatible date string like
2015-12-20 23:30:00
I got in my table two types:
hour_Event in type date
date_Event in type datetime
I would like hour_Event to be formatted to hh:mm
and date_Event to be dd/mm/yyyy
I use PHPMyAdmin and im new with MySQL so I dont know how to change the format and for what.
How do I do it?
**DATE_FORMAT(hour_Event,'%h:%i')** will give you hour_Event in hh:mm
and
**DATE_FORMAT(date_Event,'%d/%m/%Y')** will give you date_Event in dd/mm/yyyy
You could change the format using php before you insert data or after retrieving themfrom your database according to your needs.You could use DateTime / strtotime() & date(). In most cases a single timestamp field in your table is enough for an event.
Have a look here:
Convert one date format into another in PHP
Also you could format your field according to your needs with mysql for example:
DATE_FORMAT(tables.field, '%d-%m-%Y %H:%i:%s') AS 'new_name'
Have a look about it here:
http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html#function_date-format
I've got this as the select part of my query:
SELECT cast(cast(exp_channel_titles.edit_date as char(14)) as datetime) AS Edit_Date
That takes data from a db in this format 20130501092128 and returns it in this format 2013-05-01 09:21:28
I can only assume it is some kind of magic as i don't fully understand how this works tbh.
But, i need to change the format of the date that it spits out to this format: %d/%m/%Y %k:%i:%s
I can honestly say i have no idea how to do this in that query, i've tried adding it as a param to datetime (is that even a mysql function?!?) but no joy and many other poor attempts that i wont go into.
If anyone can help, i'd be hugely grateful!
MySql automatically converts 20130501092128 to a date and time field, even if it is a VARCHAR or a INT, and you can just use this:
SELECT DATE_FORMAT(exp_channel_titles.edit_date, '%d/%m/%Y %k:%i:%s')
Please see fiddle here.
You can change output format using DATE_FORMAT() function from MySQL. Here is the documentation post about it.
https://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_date-format
You can change the output format into whatever format you want, but if you recieve that data into an application, modifies it and return that data to server (editing a row for example). Remember to reformat it into a valid date for MySQL.
If you dont know how to do it, just have to do this into your query:
SELECT DATE_FORMAT(cast(cast(exp_channel_titles.edit_date as char(14))
as datetime), '%e/%m/%Y %k:%i:%s') AS Edit_Date
Ok guys, I hope someone here can help me.
I got a bunch of XML files I have to import with this time format:
20100712 17:51:03
And according to the MYSQL docs, the correct DATETIME format is:
'YYYY-MM-DD HH:MM:SS'
As you can see, the only thing that is ruining the show for me is those hyphens between the year, month and date.
Would anyone know of a good tip to try to adapt this format to MYSQL's? I already tried importing it just like it is and MYSQL changes the date to 00-00-00 00:00:00 because it's in an invalid format.
Try STR_TO_DATE:
http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_str-to-date