Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
If I am searching for the string ABC123. Does it affect performance if I have
SELECT string FROM TABLE WHERE
string like `ABC123%`
A couple notes if this helps with the answer. The longest the string will be is 6 characters. There won’t be anything like ABC1231 or ABC123B
If
stringis indexed you shouldn’t see any performance difference.That said, you should always perform prudent performance testing in your environment, against your data, and with a realistic and concurrent workload rather than rely on what some guy on StackOverflow says.