在 mysql 中使用 CAST 进行不正确的排序

Question

我以此为例来说明我使用CAST 得到的不正确结果：

CREATE TABLE tbl (ints VARCHAR(11));

INSERT INTO tbl VALUES
('100A'), 
('100B'), 
('101'), 
('102'), 
('101A'), 
('101B'), 
('101C'), 
('101D'), 
('100C'), 
('100D'), 
('101B');

SELECT * FROM tbl ORDER BY CAST(ints AS SIGNED) 

SQL Fiddle

结果应该是

100A
100B
100C
100D
101
101A
101B
101C
101D
102

Answer 1

试试

 SELECT *
 FROM tbl
 ORDER BY CAST(ints AS char) 

Answer 2

你快到了，使用

SELECT *
FROM tbl
ORDER BY CAST(ints AS SIGNED), ints

Answer 3

SELECT * FROM tbl ORDER BY CAST(`ints ` AS SIGNED)

逆序

SELECT * FROM tbl ORDER BY CAST(`ints ` AS SIGNED) DESC