MySQL delete statement report Truncated incorrect datetime value - mysql

Question

This statement works fine:
SELECT * FROM table_name
WHERE DATE(date_event) < DATE(NOW() - INTERVAL 90 DAY);
Using the same WHERE clause in DELETE statement does not works :
DELETE FROM table_name
WHERE DATE(date_event) < DATE(NOW() - INTERVAL 90 DAY);
Return message :
Error Code: 1292. Truncated incorrect datetime value: '2018-01-10T13:22:29.000000Z'
Datatype of field "date_event" is CHAR(27).
Testing DATE() function with next SQL statement works fine :
SELECT DATE('2018-01-10T13:22:28.000000Z');
'2018-01-10'
Here the complete SQL code :
CREATE TABLE `table_name` (
`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`date_event` char(27) NOT NULL COMMENT 'YYYY-MM-DDThh:mm:ss.ffffffZ',
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8 COMMENT='Test';
INSERT INTO table_name
(date_event) VALUES ('2018-01-10T13:22:28.000000Z');
SELECT * FROM table_name
WHERE DATE(date_event) < DATE(NOW() - INTERVAL 90 DAY);
DELETE FROM table_name
WHERE DATE(date_event) < DATE(NOW() - INTERVAL 90 DAY);

Answer 1

date_event field is Char (string type). We will need to convert it to MySQL datetime format using Str_to_Date() function:
'2018-01-10T13:22:28.000000Z' can basically be written in terms of format specifiers as: '%Y-%m-%dT%T.%fZ'.
So, your Delete query should be as follows (DB Fiddle DEMO):
DELETE FROM table_name
WHERE STR_TO_DATE(date_event, '%Y-%m-%dT%T.%fZ') < DATE(NOW() - INTERVAL 90 DAY);
And, your Select query should be:
SELECT * FROM table_name
WHERE STR_TO_DATE(date_event, '%Y-%m-%dT%T.%fZ') < DATE(NOW() - INTERVAL 90 DAY);
Additional Details:
%Y Year as a numeric, 4-digit value
%m Month name as a numeric value (00 to 12)
%d Day of the month as a numeric value (01 to 31)
%T Time in 24 hour format (hh:mm:ss)
%f Microseconds (000000 to 999999)
Complete list of format specifiers can be seen at: https://dev.mysql.com/doc/refman/8.0/en/date-and-time-functions.html#function_date-format