Order by char column numerically

问题

How to Sort Character column numerically. I have a column of numbers stored as chars. When I do a ORDER BY for this column I get the following:

100D
131A
200
21B
30
31000A
etc.

There may be chance of having one Alphabet at the end. How can I order these chars numerically? Do I need to convert something or is there already an SQL command or function for this?

回答1:

You could use something like:

ORDER BY Cast(regexp_replace(yourcolumn, '[^0-9]', '', 'g') as integer)

来源：https://stackoverflow.com/questions/8587640/order-by-char-column-numerically