Need to know how to deal with a mysql timestamp field ..
I mean When I add a new date into PHPMYADMIN .. and the field is timestamp .. it saves a readable date .I find this strange as I know that timestamp is supposed to be integr .It is the integer that represents number of seconds passed since 01-01-1970 till this date .
And if this is logical .. from my php script what shall I send to the database to save in this mysql timestamp field ?
Thank you so much
Mysql Timestamp format is YYYY-MM-DD HH:MM:SS .And it ranges from 1970-01-01 00:00:01 to 2038-01-19 03:14:07 .For saving unix timestamp in mysql you need to use INT as datatype
TIMESTAMP columns are displayed in the same format as DATETIME columns. In other words, the display width is fixed at 19 characters, and the format is YYYY-MM-DD HH:MM:SS.
Reference: http://dev.mysql.com/doc/refman/4.1/en/timestamp.html
Related
Ive recently purchases a script from a website and I was going through the code to see how it inserts and extracts data from mysql... there's this one cell in a table title "issue_date" has just numerical values in it and I am not familiar with this date format, the other column "expiry_date" is the same. Here are the values in the mysql cells "issue_date" [1565481600] and "expiry date" [1568073600]. on the frontend page these numbers translate in to today's (issue) date + 350 days (expiry) date. I need help with identifying the format these numbers are in. Thanks.
It is in timestamp format.
A timestamp is a numeric value in seconds between the current time and value as at 1st January, 1970 00:00:00 Greenwich Mean Time (GMT).
The value returned by the time function depends on the default time zone.
visit https://www.guru99.com/php-date-functions.html
Check time value of time in human readable form
The format is a Unix Time Stamp.
Here's a good website to convert given Unix Time stamp to human readable format, and back.
I have a datetime field that saves data as a string. But I want to save it as a date type.
Is there any date data type in Postgre sql that accepts this kind of date format?
February 1, 2016, 10:17 AM
You can use TIMESTAMP, DATE or TIME field to save your date, but date variables/ fields in postgres doesnt save format.
http://www.postgresql.org/docs/9.4/static/datatype-datetime.html
You have to use postgres function to_date(text, text) to convert from string to date
http://www.postgresql.org/docs/9.4/static/functions-formatting.html
You have TIMESTRAMP and TIMESTAMP WITH TIME ZONE.
You can have all the information here: http://www.postgresql.org/docs/9.4/static/datatype-datetime.html
I have issue with this date m/d/y for example 01/09/15 but when i insert that in my table of field name date and declared date i adde to me 2001/09/15 how can i save this format 01/09/15 in field database of my table
You can't change the format of mysql dates. You could save your date as a varchar but you can't use any manipulation.
You can save it as a mysql date or a time int, and then cast it to the format that you want, using date function.
You can read more about this in this post:
Change date format (in DB or output) to dd/mm/yyyy - PHP MySQL
I hope this will be useful.
I am using Mysql database to store the data.
I am facing some issues regarding date fields. Date is stored in YYYY-MM-DD format in database. when i am retrieving date from database I am using the following code.
echo(date("d.m.Y", strtotime($row_getsavedetails['Purchase_WarrantyStartDate'])));
this is working fine if a date is present in the database.
If there is no date in the database '01/01/1970' is getting displayed in the front end.
I am not able to understand, how this date is coming up.
Please help me in this regard.
UNIX timestamps are expressed as seconds relative to Jan. 1st 1970 UTC. strtotime turns a date written in human readable format into UNIX timestamps. If there is no valid date, it returns false. date interprets its second parameter as integer, as UNIX timestamp. Therefore it casts false to 0. 0 is zero seconds from Jan. 1st 1970. Hence, you get 01.01.1970.
Why not check before echoing?
if(!empty($row_getsavedetails['Purchase_WarrantyStartDate']))
{
echo(date("d.m.Y", strtotime($row_getsavedetails['Purchase_WarrantyStartDate'])));
}
else { echo "Date is not available"; }
The fact you get 01/01/1970 , See deceze's answer.
01/01/1970 is the default unix timestamp if left NULL. Best to add a check to handle NULL values in this case.
First of all you have to know that dates are represented (almost anywhere in a computer) like the number of miliseconds from 1/1/1970.
So if you are getting that date it means that the value you inserted in the database (by default) when creating the date was 0.
You are getting the Default date returned if the value you try and convert is null.
You will have to check if the date is empty first.
echo empty($row_getsavedetails['Purchase_WarrantyStartDate']) ? "Date is null" : date("d.m.Y", strtotime($row_getsavedetails['Purchase_WarrantyStartDate']));
While creating a table, I defined one column of DATE type and one of TIME type. As I insert the values using a php script like :
date--> 2013-11-11
time--> 12:12:12
and when I query the sql browser I see those values in exactly the same manner. But I am unaware of the format with which it stores the date and time. Like yyyy-mm-dd or yyyy-dd-mm.
Is there any way I change it ?
Dates and times are stored in MySQL in the format "YYYY-MM-DD" and "YYYY-MM-DD HH:MM:SS" which is not necessarily the format you want to display in your web page or application. There are two methods to reformat the date and time into the desired format. One is to do it in the SQL query in MySQL calling the DATE_FORMAT() function and the other is to do it with the programming language retrieving the data from the MySQL database.
From MySQL 5.1:
The DATE type is used for values with a date part but no time part.
MySQL retrieves and displays DATE values in 'YYYY-MM-DD' format. The
supported range is '1000-01-01' to '9999-12-31'.
For second question: you can't change default DATE format for the storage, please see this question also
http://dev.mysql.com/doc/refman/5.5/en/datetime.html
MySQL retrieves and displays DATE values in 'YYYY-MM-DD' format
http://dev.mysql.com/doc/refman/5.5/en/time.html
MySQL retrieves and displays TIME values in 'HH:MM:SS' format
I do not believe this can be changed. But you do not care. You can extract dates and times in the format of your liking with the DATE_FORMAT() and the TIME_FORMAT() functions.
If you want to know the internal storage of Date columns, you can check Date and Time Data Type Representation, but I think you want to select date in different format; which other guys already answered about it.
It is stored in 3 bytes, and it is always YYYY-MM-DD.
The datetime is in Y-m-d H:i:s format, or year month day and hour minute second. If you only use a part, the format stays the same.
If you want to change the format there are many ways. The easiest would be to do something like return date("Y-d-m H:i:s", strtotime($mysqldatetime)); (will turn it to dutch date);
Keep in mind that you are using two seperate columns, one for time and one for the date. If you use only one column the missing values are filled with default values (time would be 00:00:00 and date would be 1970-01-01