MySQL LIKE with range doesn't work

Question

I\'ve got a database table mytable with a column name in Varchar format, and column date with Datetime values. I\'d like to count names with certa

Answer 1

I believe LIKE is just for searching for parts of a string, but it sounds like you want to implement a regular expression to search for a range.

In that case, use REGEXP instead. For example (simplified):

SELECT * FROM mytable WHERE name REGEXP "[a-z]"

Your current query is looking for a string of literally "[a-z]".

Updated:

SELECT
CAST(t.date AS DATE) AS 'date',
COUNT(*) AS total,
SUM(LENGTH(LTRIM(RTRIM(t.name))) > 4 
    AND (LOWER(t.name) REGEXP '%[a-z]%')) AS 'n'
FROM
mytable t
GROUP BY 
CAST(t.date AS DATE)