从多个条件为真的表中选择

Question

Trying to run some SQL with no luck, trying to select data from two tables where a condition is true.

The tables are driver_details and locations. Both tables have the column user_id, and I want to get data from both based on the matched user_id from the between part. (that select statement works and returns ID's);

SELECT driver_details.firstName,
                    locations.lat,
                    locations.lng
                    FROM driver_details
                    INNER JOIN locations
                    WHERE user_id = 
                    (SELECT user_id FROM locations WHERE 
                    (lat BETWEEN 0 AND 5) AND 
                    (lng BETWEEN 0 AND 5))

I am getting the error: Fatal error: Call to a member function bind_param() on a non-object in C:\\xampp\\htdocs\\vector\\www\\scripts\\getDriversInRange.php on line 33

Answer 1

You need to RELATE the 2 tables being JOINed using SOMETHING that's common in both tables, which is used to connect them ... you mention user_id

...
FROM driver_details
INNER JOIN locations
ON driver_details.user_id = locations.user_id
WHERE ...

Answer 2

SELECT d.firstName,
    l.lat,
    l.lng
FROM driver_details d
    INNER JOIN locations l ON d.user_id = l.user_id
WHERE l.lat BETWEEN 0 AND 5
    AND l.lng BETWEEN 0 AND 5

This is basically a more complete example of what BWS posted.