两个范围之间的MySQL查询

Question

I need help with a query. I am taking input from a user where they enter a range between 1-100. So it could be like 30-40 or 66-99. Then I need a query to pull data from a table that has a high_range and a low_range to find a match to any number in their range.

So if a user did 30-40 and the table had entries for 1-80, 21-33, 32-40, 40-41, 66-99, and 1-29 it would find all but the last two in the table.

What is the easiest why to do this?

Thanks

Answer 1

如果我理解正确（即您想要与用户输入的范围重叠的任何范围），我会说：

SELECT * FROM table WHERE low <= $high AND high >= $low

Answer 2

What I understood is that the range is stored in this format low-high . If that is the case, then this is a poor design. I suggest splitting the values into two columns: low , and high .

If you already have the values split, you can use some statement like:

SELECT * FROM myTable WHERE low <= $needleHigherBound AND high >= $needleLowerBound

If you have the values stored in one column, and insist they stay so, You might find the SUBSTRING_INDEX function of MySQL useful. But in this case, you'll have to write a complicated query to parse all the values of all the rows, and then compare them to your search values. It seems like a lot of effort to cover up a design flaw.