About this solution: The candidate's solution does not demonstrate a level of completeness and does not solve the problem. The general approach is to select all data from the table, but this does not return the data in ascending order of id. To solve the problem, the candidate would need to add an 'ORDER BY' clause to the query.

About this solution: The candidate's solution correctly returns the data in the table in ascending order of id. The solution is complete and solves the problem. The approach is straightforward and easy to understand.

About this solution: This solution is incomplete because it does not account for email addresses that may have more than one '@' character. A more complete solution would use a regular expression to match email addresses.

About this solution: The candidate's solution correctly returns the data in the table in ascending order of id. The solution is complete and solves the problem. The approach is straightforward and easy to understand.

About this solution: The solution correctly uses the LIKE operator to check if the email contains an @ symbol.