I want to fetch all datas that corresponds in the chosen date range.
So the problem is that. When theres included time in the data. It can't fetch the required data to be displayed. But when I remove the time on it. It displays really well. What can I do to make it right?
EXAMPLE VALUES:
2018-10-29 01:21:29pm
2018-10-30 01:21:29pm
EXAMPLE VALUES THAT WORKS:
2018-10-29
2018-10-30
My query:
`"SELECT *,SUBSTRING(order_date,1,10) from orders where order_date >='$fromdate' AND order_date <='$todate'"`
Ideal Solution: You will need to change the datatype of order_date from Varchar(500) to Datetime type, using Alter Table command.
Now, it is noteworthy that the MySQL datetime value is in YYYY-MM-DD HH:MM:SS format. So firstly, you will need to change your datetime string to MySQL datetime format string. Otherwise, directly changing the datatype will lead to irreparable loss/truncation of data.
Your datetime value 2018-10-29 01:21:29pm is basically of YYYY-MM-DD HH:MM:SS AM/PM (12 hour format). In terms of format specifiers, it would be: '%Y-%m-%d %h:%i:%s%p'. Complete list of available format specifiers can be seen in MySQL docs.
Firstly, we use Str_To_Date() function to convert all your data into proper Datetime format.
UPDATE orders
SET order_date = STR_TO_DATE(order_date, '%Y-%m-%d %h:%i:%s%p');
Now, next step is simple. Just modify the datatype to datetime:
ALTER TABLE orders
MODIFY COLUMN order_date datetime;
Related
So I'm trying to insert dates into a table and the date is in this format:
8/3/2021
However I want to add a leading 0 before the month and day so the date shows 08/03/2021. Also I want to add it as a string concatenated with another string so test123-08/03/2021
If you really store date in that format then you may try this:
SELECT
DATE_FORMAT(STR_TO_DATE(date_col_string,'%d/%m/%Y'),'%d/%m/%Y') as 'zero-padded',
CONCAT(string_val,'-',DATE_FORMAT(STR_TO_DATE(date_col_string,'%d/%m/%Y'),'%d/%m/%Y')) as 'concatenated'
FROM mytable;
Use STR_TO_DATE() function to change the date value to standard MySQL date format of YYYY-MM-DD then use DATE_FORMAT() function to display the date value as per your desired output. The second operation is adding CONCAT() function on the converted date with your selected string. I'm assuming that your date value is d/m/y, because as #Stu mentioned in the comment, since you're not storing as MySQL standard date format, that means 8/3/2021 can be either d/m/y or m/d/y. With a standard date format value, the query would be shorter:
SELECT
DATE_FORMAT(date_col,'%d/%m/%Y') as 'zero-padded',
CONCAT(string_val,'-',DATE_FORMAT(date_col,'%d/%m/%Y')) as 'concatenated'
FROM mytable;
Demo fiddle
You should be inserting your source dates into a proper date or datetime column. Then, to view your dates in the format you want, use the DATE_FORMAT() function with the appropriate format mask:
SELECT DATE_FORMAT(date_col, '%d/%m/%Y') AS date_out
FROM yourTable;
In my table have two columns, one as timestamp to save the date and one as time string to save the time with period.
Eg:
I want to combine them into one column as DateTime format in the result then order by desc on that column.
Here is the example: http://sqlfiddle.com/#!9/25eb21/4
The column name 'Datetime' expected is Datetime or timestamps type, so I can sort correctly on it.
You do not need to convert the values to integers to add them. MySQL has built-in functions for this purpose:
SELECT *,
addtime(apptDate, str_to_date(apptTime, '%h:%i %p')) as datetime
FROM appt
ORDER BY Datetime DESC;
If apptTime is just a time value (which it should be), then you obviously do not need to convert from a string. I would usuggest fixing the data model.
Let me assume that you want to add the duration that is stored as a string in column apptTime to timestamp in column apptDate.
A typical approach uses str_to_date() to turn the string to a datetime, then converts the time portion to seconds using time_to_sec(), which we can then add to the timestamp using date artihmetics.
So
select t.*
apptdate
+ interval time_to_sec(str_to_date(appttime, '%h:%i %p')) second
as newapptdate
from mytable
select addtime(appDate, appTime) from ...
Your appDate contains a time, probably because you are applying a timezone. Either convert your two columns to the timezone your data is supposed to be in with convert_tz(), or extract the date part of it with date(appDate) before you add it. It wasn't clear which of the columns was a string, but extract() or str_to_date() is the way to parse a text into a date and/or time.
In mysql database,column name created.This "created " column is text datatype,I need to change this to datetime.Now this column have so many datas.Is it possible to convert it or?
Database look like
created
18-11-15 18:21:25
Expecting ouput is
created
2018-11-15 18:21:25
When am doing
ALTER TABLE invoices MODIFY created datetime
This query giving wrong data.its converting from 15-09-18 03:03:43 to 2015-09-18 03:03:43
If the original data is not in MySQL Datetime format (YYYY-MM-DD HH:MM:SS), you cannot just change the column datatype from Varchar/Text to Date/Datetime. Otherwise, there will be an irreparable Data loss.
This will be a multi-step process. You will first need to convert the date string to MySQL date format (YYYY-MM-DD HH:MM:SS). We can use STR_TO_DATE() function for this.
Your sample date string (18-11-15 18:21:25) is basically in %y-%m-%d %T format. Following format specifiers can be used:
%d Day of the month as a numeric value (01 to 31)
%m Month name as a numeric value (00 to 12)
%y Year as a numeric, 2-digit value
%T Time in 24 hour format (hh:mm:ss)
The query to update the date would look as follows:
UPDATE invoices
SET created = STR_TO_DATE(created, '%y-%m-%d %T');
Now, you can use Alter Table to change the data type from Text type to Datetime.
ALTER TABLE invoices
MODIFY COLUMN created datetime;
The best thing to do here is to not store your dates as text. Assuming you have already done this, we can cope by calling STR_TO_DATE to generate a bona fide date:
SELECT
STR_TO_DATE(created, '%y-%m-%d %h:%i:%s') AS created_out
FROM yourTable;
Since the output you expect is standard date output, we can stop here and avoid also calling DATE_FORMAT to generate a different output.
you want to convert output or database records ? for second you can use sql query :
UPDATE 'table_name' SET 'created' = CONCAT('20', 'created')
You will need first to interchange the day with the year in the created column, as follows:
UPDATE invoices
SET created = CONCAT(SUBSTR(created, 7, 2), '-', SUBSTR(created, 4, 2), '-', SUBSTR(created, 1, 2));
Then, you convert the column to DATETIME, as follows:
ALTER TABLE invoices MODIFY created DATETIME;
Hope this helps.
I have my sql database which have a field date and its type is varchar,I want to convert it into the Date but i have a lot of record in this field.
Kindly guide me how i can covert it into Date type without loosing my data.
It's looking like : 20-10-2018
But i want to change the date column varchar type to Date.
Thanks.
You will first need to convert the date string (varchar) to MySQL date format (YYYY-MM-DD). We can use STR_TO_DATE() function for this.
Your sample date string (20-10-2018) is basically in dd-mm-yyyy format. Following format specifiers can be used:
%d Day of the month as a numeric value (01 to 31)
%m Month name as a numeric value (00 to 12)
%Y Year as a numeric, 4-digit value
The query to update the date would look as follows (DB Fiddle DEMO):
UPDATE your_table_name
SET date_column_name = STR_TO_DATE(date_column_name, '%d-%m-%Y');
Now, you can use Alter Table to change the data type from varchar to date.
ALTER TABLE your_table_name
MODIFY COLUMN date_column_name date;
I am trying to store the date in mysql as mm-dd-yyyy.
The following query updates the table stores the date as 0000-00-00
UPDATE `h3`.`newbatch` SET `DateCreated` = '11-08-2013' WHERE
`newbatch`.`BatchID` =
1 AND `newbatch`.`DateCreated` = '2013-11-08' LIMIT 1
I can always use DATE_FORMAT(DateCreated,'%m %d %Y') during select but is there a way to store date in that format.
The datatype of DateCreated is Date.
I am using MySQL.
Thanks
Do not modify the storage format of a date. The format for the date data type is ISO 8601 standard for a reason. You will lose the ability to perform most date functions elegantly (without first converting to the standard date format). You do the formatting when you run a query.