The function of the str_to_date method in mysql: convert the time format string into a DATETIME type value according to the provided display format, such as [SELECT STR_TO_DATE('2017-01-06','%Y- %m-%d) AS result].
The STR_TO_DATE(str,format) function converts the time format string (str) into the DATETIME type according to the provided display format (format) value.
(Recommended tutorial: mysql video tutorial)
SELECT STR_TO_DATE('2017-01-06 10:20:30','%Y-%m-%d %H:%i:%s') AS result;
SELECT STR_TO_DATE('2017-01-06 10:20:30','%Y-%m-%d') AS result2;
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