Question

When I use this query:

SELECT `visitors`.`id`, `visitors`.`ip`, `visitors`.`url`, `visitors`.`time`, `visitors`.`agent`, `visitors`.`reference`
FROM (`visitors`)
WHERE  `reference` NOT LIKE '%bot%'
ORDER BY `id` desc
LIMIT 2000

In the results I can’t see rows where the reference column is empty. What should I do to create a result set with empty reference columns?

Answer 1

Try :

SELECT `visitors`.`id`, `visitors`.`ip`, `visitors`.`url`, `visitors`.`time`, `visitors`.`agent`, `visitors`.`reference`
FROM (`visitors`)
WHERE  `reference` NOT LIKE '%bot%' OR `reference` IS NULL
ORDER BY `id` desc
LIMIT 2000

NULL is not handled the same way as an empty value.