regex - MySQL | REGEXP VS Like

Question

I have a table CANDIDATE in my db which is running under MySQL 5.5 and I am trying to get rows from table where RAM is contains in firstname, so I can run below two queries, but I would like to now which query we should use for long term with respect to optimization.

SELECT * FROM CANDIDATE c WHERE firstname REGEXP 'ram';
SELECT * FROM CANDIDATE c WHERE firstname LIKE'%ram%';

Answer 1

REGEXP and LIKE are used to totally different cases.

LIKE is used to add wildcards to a string whereas REGEXP is used to match an attribute with Regular Expressions.

In your case a firstname is more likely to be matched using LIKE than REGEXP and hence, it will be more optimized.