You could try (depending on your data content) value >= input 1 and value =< input 2. But as Teodor mentions, your data field type is wrong for what you are trying to do.
I have created a view using the CAST function in MySQL. The following SQL added an extra field called sent_expr to the results which I was then able to create a view from:
SELECT
CAST(table.field AS UNSIGNED) AS field_expr,
table.*
FROM table
From there I was able to use the >= and =< suggested by Brad on the field_expr, it now being an INT field.
Not sure if this is the right way of doing it but it’s worked…