How to convert mysql var to date

Mysql var to date method: First use the str_to_date function to convert its varchar type to date type; then sort from small to large.

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The following table:

First use the str_to_date function to convert its varchar type to date type, and then sort from small to large

Syntax:select str_to_date(class_time,'%Y%m%d %H: %i:%s') a from a order by a desc ;

## Let’s take a look at the date format of varchar type in Oracle Convert date type

Convert date format from varchar type in oracle

SELECT to_char(to_date(m.ma_datetime,'yyyy-MM-dd hh24:mi:ss'), 'yyyyMMdd') FROM my_task m;

m.ma_datetime is a date format of varchar2 type, first convert date type

(Must add hours, minutes and seconds, otherwise ora-01830 error will be reported)

Then convert it to varchar type as you like

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