[MySQL] Plain SELECT, plus RegExp
Really, not much to discuss; we will just need to get REGEXP matches so that:
the first part matches alphanumerical characters and _, which we can get by groupi
Really, not much to discuss; we will just need to get `REGEXP` matches so that:
* the first part matches alphanumerical characters and `_`, which we can get by grouping with `[a-z0-9_]` (`\w` would work too, but I preferred a more explicit form) and a `+` (meaning one or more matches);
* then we have a `@`
* next comes the domain, made of only letters (ie: `[a-z]`), again, one or more of them, so another `+`;
* finally we have an escaped `.` and then `com`.

# Code
```mysql []
# Write your MySQL query statement below
SELECT user_id, email
FROM Users
WHERE (email REGEXP '[a-z0-9_]+@[a-z]+\.com');
```
['MySQL']