Importing a CSV to MySQL with different date forma

问题:

I'm doing my first CSV import into MySQL and noticed that the date in the CSV has the format 31-Jan-2011. How can I convert this to 2011-01-31 so I can place it in the DATE datatype? The first thing which came to mind is let PHP do the conversion then insert it into a 2nd table but I'm guessing that's...not right.

回答1:

You can replace format during importing data from the CSV file, for example -

LOAD DATA INFILE 'file_name.csv'
INTO TABLE table_name
FIELDS TERMINATED BY ';'
LINES TERMINATED BY '\n'
(id, column2, column3, @date_time_variable) -- read one of the field to variable
SET date_time_column = STR_TO_DATE(@date_time_variable, '%d-%b-%Y'); -- format this date-time variable

It will format the string like '31-Jan-2011' to a correct DATETIME data type.

More information here - LOAD DATA INFILE Syntax.

回答2:

mysql> SELECT DATE_FORMAT('2009-10-04 22:23:00', '%Y-%m-%d');
+------------------------------------------------+
| DATE_FORMAT('2009-10-04 22:23:00', '%Y-%m-%d') |
+------------------------------------------------+
| 2009-10-04                                     | 
+------------------------------------------------+
1 row in set (0.00 sec)

回答3:

If the file isn't too big, load the CSV into Excel and use the formatting commands there to change the date representation.