What is the correct DateTime format for MySQL Database?

问题

I am Inserting this DateTime data '12/21/2012 1:13:58 PM' into my MySQL Database using this SQL string:

String Query = "INSERT INTO `restaurantdb`.`stocksdb` 
                  (`stock_ID`,`stock_dateUpdated`) 
                  VALUES ('@stockID' '@dateUpdated');

and I receive this error message:

Incorrect datetime value: '12/21/2012 1:13:58 PM' for column 'stock_dateUpdated' at row 1

So what is the right format/value for dateTime to input into a MySQL database?

回答1:

Q: What is the right format/value for DATETIME literal within a MySQL statement?

A: In MySQL, the standard format for a DATETIME literal is:

 'YYYY-MM-DD HH:MI:SS'

with the time component as a 24 hour clock (i.e., the hours digits provided as a value between 00 and 23).

MySQL provides a builtin function STR_TO_DATE which can convert strings in various formats to DATE or DATETIME datatypes.

So, as an alternative, you can also specify the value of a DATETIME with a call to that function, like this:

STR_TO_DATE('12/21/2012 1:13:58 PM','%m/%d/%Y %h:%i:%s %p')

So, you could have MySQL do the conversion for you in the INSERT statement, if your VALUES list looked like this:

... VALUES ('@stockID', STR_TO_DATE('@dateUpdated','%m/%d/%Y %h:%i:%s %p');

(I notice you have a required comma missing between the two literals in your VALUES list.)

MySQL does allow some latitude in the delimiters between the parts of the DATETIME literal, so they are not strictly required.

MySQL 5.5 Reference Manual.

回答2:

What I've used that works is year-month-day, with 24 hour time. In PHP it's date('Y-m-d H:i:s'), which I believe would correspond to yyyy-MM-dd HH:mm:ss in C#/.NET. (The time part is optional, and so are the dashes.)

Confirmed in the docs, Date and Time Literals:

Date and time values can be represented in several formats, such as quoted strings or as numbers, depending on the exact type of the value and other factors. For example, in contexts where MySQL expects a date, it interprets any of '2015-07-21', '20150721', and 20150721 as a date.

回答3:

As mentioned in the comment, you are missing the delimiter , in the values. Also better to use STR_TO_DATE to convert string into date object first before inserting as:

String Query = "INSERT INTO `restaurantdb`.`stocksdb` "+
                " (`stock_ID`,`stock_dateUpdated`) VALUES "+
               "('@stockID', STR_TO_DATE(@dateUpdated, '%m/%d/%Y %h:%i:%s %p'))";

回答4:

The MySql DATETIME format is YYYY-MM-DD HH:MM:SS - See this page

来源：https://stackoverflow.com/questions/13984638/what-is-the-correct-datetime-format-for-mysql-database

标签

mysql

sql

insert