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Perform comparison(<=, >=) operation on alphanumeric string in mysql

I have a table named "Test" contains following data

Name

A-00011
A-00012
A-00102
A-00202


and I want to fetch all record that are '<150'.

'<150'

so anyone can help how to perform the <= and >= operation on alphanumeric string in mysql via query.

2 Answers
2

This can be done by substringing to remove the first two chars, then cast to unsigned int:

SELECT CAST(SUBSTRING("A-00012", 3) AS UNSIGNED)


Your query would look something like:

SELECT * FROM Test WHERE CAST(SUBSTRING(myColumn, 3) AS UNSIGNED) <= 150


SELECT *
FROM test
WHERE name < 'A-00150';


should work. (Assuming that's what you mean by "'<150'" and that all the names follow that pattern.)

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