mysql - 检查两列之间的输入值

Question

下面是我的数据库架构。

id   from  to    value
1    1     10    5
2    11    NULL  10   -- I have stored 'NULL' for any value GREATER THAN 11

现在我必须选择和之间的value位置。input like (4)fromto

我知道可以通过这个查询来实现。

SELECT *
FROM   TABLE
WHERE  4 BETWEEN `from` AND `to`

但是如何选择价值input呢15？

SELECT *
FROM   TABLE
WHERE  15 BETWEEN `from` AND `to`

在这种情况下，上面的查询将不起作用，因为to列有null.

更新

如果它可以有任何值，列to将包含。null

现在如果输入值为15，则查询应返回第二行，因为15 is not between 1 and 10 in 1st rowand15大于 11 并且tovalue 可以是大于 11 的任何值。

Answer 1

SELECT *
FROM   TABLE
WHERE  15 BETWEEN coalesce(`from`,15) AND coalesce(`to`,15);

Answer 2

使用布尔组合

select *
    from table
    where (to is not null and 15 between from and to)
        or (to is null and 15 >= from)

Answer 3

SELECT *
FROM   TABLE
WHERE  15 BETWEEN `from` AND IF_NULL(`to`,15)