How to identify a number is available in a range of numbers in 2 columns in SQL

I have a table with 2 columns a and b. I want to write a query to search a number is available in the column or the number falls between those 2 columns. I tried using >=,<= also with between but it is not returning any result.

Could someone help me with the query?

• If the input parameter is 1, it should return true.
• If the input parameter is 3, it should return true.
• If the input parameter is 7, it should return true.
• If the input parameter is 15, it should return false.

Thanks

Table with values and expected output:

Say you have a couple of tables like the following:

CREATE TABLE number_ranges (
    A INT,
    B INT
);

INSERT INTO number_ranges (A, B) VALUES (1, 1), (2, 2), (3, 3), (5, 10), (20, 100);

CREATE TABLE search_inputs (
    `Search(Input)` INT
);

INSERT INTO search_inputs (`Search(Input)`) VALUES (1), (3), (7), (15);

You can use BETWEEN, CASE, and EXISTS to achieve your desired output:

SELECT 
    si.`Search(Input)`,
    CASE 
        WHEN EXISTS (
                 SELECT 1 
                 FROM number_ranges nr 
                 WHERE si.`Search(Input)` BETWEEN nr.A AND nr.B
             )
        THEN 'TRUE'
        ELSE 'FALSE'
    END AS Output
FROM search_inputs si;

Output: