How to use SQL Order By statement to sort results case insensitive?

问题

I have a SQLite database that I am trying to sort by Alphabetical order. The problem is, SQLite doesn\'t seem to consider A=a during sorting, thus I get results like this:

A B C T a b c g

I want to get:

A a b B C c g T

What special SQL thing needs to be done that I don\'t know about?

SELECT * FROM NOTES ORDER BY title

回答1:

You can also do ORDER BY TITLE COLLATE NOCASE.

Edit: If you need to specify ASC or DESC, add this after NOCASE like

ORDER BY TITLE COLLATE NOCASE ASC

or

ORDER BY TITLE COLLATE NOCASE DESC

回答2:

You can just convert everything to lowercase for the purposes of sorting:

SELECT * FROM NOTES ORDER BY LOWER(title);

If you want to make sure that the uppercase ones still end up ahead of the lowercase ones, just add that as a secondary sort:

SELECT * FROM NOTES ORDER BY LOWER(title), title;

回答3:

SELECT * FROM NOTES ORDER BY UPPER(title)              

来源：https://stackoverflow.com/questions/2413427/how-to-use-sql-order-by-statement-to-sort-results-case-insensitive