How do I convert data that is in text to date in MySQL?
The data I have is like this
20210422
20210423
I want the data in this format
2021-04-22
This depends on what kind of database you are using, and a quick google search should turn up the proper conversion function for your DBMS. For example, MS SQL date conversion is done via CAST and CONVERT functions: CAST and CONVERT
I guess here there is some misunderstanding between date-storage and date-representation, but could you please try(for MS SQL Server)
DECLARE #InDate1 DATE='20210422';
SELECT #InDate1 AS ORIGG,CONVERT(DATE,#InDate1,120)AS CONV;
Related
I am trying to import a CSV file with date information in the format MMM-YY (e.g., Jan-92). My ultimate goal is to have the information in a date format in SQL. The format doesn't matter that much to me, but I was thinking something like dd-mm-yy (e.g., 16-01-92). I've tried a lot and looked around the forum, but can't figure it out.
Right now, I am loading the data from the CSV into a column "period_month" as a VARCHAR field.
Then, my conversion code looks like
UPDATE PERIODS
SET period_month = DATE(str_to_date(period_month,'%M-%Y'));
I end up with a field of VARCHAR type in the format yyyy-mm-dd, with the dd field set to '00'. (e.g., 1992-01-00)
I really just want this to be in a date format that I can export to another program like R for analysis.
Any help appreciated.
try
UPDATE PERIODS
SET period_month =DATE(str_to_date('Jan-92','%M-%Y')+1)
or
UPDATE PERIODS
SET period_month =DATE(str_to_date('period_month','%M-%Y')+1)
use date_format function of mysql query
I have a MySql table with a String 2014-02-21 16:53:01 stored in a varchar column. I need to use Talend Data Integration to convert it into a date for calculations in the format dd/mm/yyyy hh:mm:ss and to store it in that format in another MySql as a date column after the calculations.
I have a talend tmap component but I get parsing errors and not sure how to solve it and the general sequence of steps needed.
In the tmap I have a variable with the expression
row1.date !=null ? TalendDate.parseDate("dd/mm/yyyy hh:mm:ss",row1.date):null
Which I hope will load the variable wiIs that the best way to
Convert the string in the source table to a date in the format I need?
How do you handle null dates as I need to get the difference between 2 dates but handle the situation where 1 or both may be blank or null
How do I get the destination table to store the date in the format I need? I have the Date Pattern supplied in the destination tmap schema but is that enough if the date format is yyyy-mm-dd ?
Any Talend experts able to help a novice out?
For better control on null check I recommend you to use below function.
!Relational.ISNULL(row1.date) && !"".equalsIgnoreCase(row1.date) ?TalendDate.parseDate("MM/dd/yyyy HH:mm",row1.date):(null or default date);
if you are doing any operation on date? then don`t supply null as a result because you may get error on next component.
always pass default value so that you can check in next component and ignore it or store it based on business need.
You can try below condition which will take care of blank string also;-
row1.date !=null && !"".equalsIgnoreCase(row1.date)? TalendDate.parseDate("MM/dd/yyyy HH:mm",row1.date) : null
Thanks for the help. I decided to configure the schema for the database input to identify the dates as the date datatype instead of string which got Talend to do the work of converting
The pointers on validating the date were useful as well. Thanks for the help UmeshR
I need to convert varchar string data to time format in mysql.
For example,
I have a varchar column in table which stores time. The accepted values should be like 9:30 AM or 1200 PM. But currently it has either blank values or it has values like 9.30am or 12:00
There are many records like this, so cannot update manually.
Ithere any work around or function or procedure to do so?
please help.
Thanks
You can use the STR_TO_DATE() MySQL function to convert any string to a date.
Additionally you can use TIME() to extract the time portion of a datetime. A combination of both function is used to convert an arbitrary date string to a datetime and then you can extract the time portion from it as a valid MySQL TIME.
By default MySQL functions follow standard format but custom format can be specified and if your values don't use the international formats you'll need to check with the documentation and provide the format your system is using.
A silly question maybe but I wanted clarification. I've created a script that has a date parameter like so:
DECLARE #dateparam as datetime
SET #dateparam = '01-01-2013 00:00:00'
This looks like it is working when I test it even if the date string is not in "correct" format yyyy-MM-dd hh:mm:ss. I changed my computer regional settings to English and the script still did what it was supposed to do.
Is this because of SQL Server 2008 R2 that I have in my computer that it knows how to convert the date or can I ran into trouble with using a dateformat like I have used?
Converting 01-01-2013 won't expose issues such as which 01 is the month, and which is the day.
It's not a safe format.
The safe formats (for converting to datetime, rather than to datetime2) are:
YYYYMMDD 20121201
YYYY-MM-DD'T'hh:mm:ss 2012-12-01T10:43:29
YYYY-MM-DD'T'hh:mm:ss.mil 2012-12-01T10:43:29.337
Stick to those and only those. (The examples all represent the 1st December 2012)
Or, better yet, don't treat dates as strings at all, if you can avoid it. If you're, for example, calling SQL Server from .NET code, keep that dates as DateTimes in your code, and let ADO.NET and SQL Server deal with any required translations to make them become datetimes - without translating them to and from strings.
You're making an implicit conversion from something that looks like a date, but inf fact is a string ( '01-01-2013 00:00:00'). Rather than trusting on SQL Server to make the correct guess in what format the string is in, you should make the conversion explicit by specifying the format.
This can be done by using CONVERT (not CAST) and specify a 'style'. The different styles are listed here: http://msdn.microsoft.com/en-us/library/ms187928.aspx.
I have an Excel file that contains a column full of dates in the dd/mm/yyyy format. When I try to import it using openrowset, it said that there was a datatype mismatch. I have a table where the date is defined as type date. Now, I know that the default date format in SQL Server is yyyy-mm-dd. How can I avoid this conflict? Is there a way I can make the default date type be dd/mm/yyyy? I need to do this import operation everyday and it has to be automated and so I cannot afford it to fail in between. I tried using sp_addlanguage to make it British as the default date type is dd/mm/yyyy there, but it didn't work :(. I'm using SQL Server 2008 and Windows 7, if that is of any help. Please help me out! Thanks!
You could CONVERT the incoming data before you insert it. So, in the openrowset statement, where you select the field, you could surround it with a CONVERT statement. Here's an example:
print convert(date,'19/07/2010',103)
This is a UK style date, but if you run it you can see that it's converted it to SQL-friendly format.