我的其中一个 SQL 表中有一个字段用于存储版本号,例如 '3.4.23'
或 '1.224.43'
.
I have a field in one of my SQL tables which stores a version number, like '3.4.23'
or '1.224.43'
.
有没有办法为这个字段使用大于条件?
Is there a way to use a greater than condition for this field?
SELECT * FROM versions WHERE version_number >'2.1.27'
感谢@symcbean 和@gordon-linoff 的提示,我的最终查询如下所示:
Thanks for the tips @symcbean and @gordon-linoff, my final query looks like this:
SELECT *
FROM versions WHERE CONCAT(
LPAD(SUBSTRING_INDEX(SUBSTRING_INDEX(version_number, '.', 1), '.', -1), 10, '0'),
LPAD(SUBSTRING_INDEX(SUBSTRING_INDEX(version_number, '.', 2), '.', -1), 10, '0'),
LPAD(SUBSTRING_INDEX(SUBSTRING_INDEX(version_number, '.', 3), '.', -1), 10, '0')
) > CONCAT(LPAD(2,10,'0'), LPAD(1,10,'0'), LPAD(27,10,'0'));
这允许每个组件的长度最多为 10 位.
This allows each component to be up to 10 digits long.
它改变了这个:
X.XX.XXX > 2.1.27
为此:
'000000000X00000000XX0000000XXX' > '000000000200000000010000000027'
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