Check if an employee email contains his name - not a case sensitive - mysql

Question

I would like to display the name and the email associated with it when the employee name is contained within the email. A user can have more than one email.
employee
id name
1 Steve Been
2 Rob Kem
3 Bob Kimi
Emails
emplyee_id email
1 steve#domain.com
1 007#domain.com
1 Been#domain.com
2 Robkem#domain.com
2 Rob.Kem#domain.com
3 Boooob#domain.com
3 kimi#domain.com
The query should not be case sensitive. I would like this query to show me something like:
name email
Steve Been steve#domain.com
Steve Been Been#domain.com
Rob Kem Robkem#domain.com
Rob Kem Rob.Kem#domain.com
Bob Kimi kimi#domain.com
I tried this but I got empty output:
select empl.Name as 'employee Name', em.email as 'Product Name'
from email em JOIN employee empl
ON em.employee_id = empl.ID
WHERE FIND_IN_SET(LOWER(empl.Name),LOWER(em.Name))

Answer 1

Try
SELECT e.name,
m.email
FROM emails m JOIN
employee e ON m.emplyee_id = e.id
WHERE INSTR(m.email, SUBSTRING_INDEX(e.name, ' ', 1)) > 0
OR INSTR(m.email, SUBSTRING_INDEX(e.name, ' ', -1)) > 0
SQLFiddle
INSTR() is case insensitive unless one of the stings is a binary string, but you can always add LOWER() for a good measure.
UPDATE: As per your additional request you can do that with a query like this
SELECT name,
total,
matched,
total - matched unmatched
FROM (
SELECT e.name,
COUNT(*) total,
SUM(CASE WHEN INSTR(m.email, SUBSTRING_INDEX(e.name, ' ', 1)) > 0
OR INSTR(m.email, SUBSTRING_INDEX(e.name, ' ', -1)) THEN 1 ELSE 0 END) matched
FROM emails m JOIN
employee e ON m.emplyee_id = e.id
GROUP BY e.id, e.name) q
SQLFiddle