Column 'sno' in field list is ambiguous

The error "Column 'sno' in field list is ambiguous" typically occurs when a column name is used in a query, but it is present in multiple tables and the query does not specify which table's column should be used. To resolve this issue, you need to explicitly specify the table name for the 'sno' column in your query.

Here is an example of how you can resolve this ambiguity:

SELECT table_name.sno
FROM table_name
WHERE condition;

Replace `table_name` with the actual table name and `condition` with your desired condition.

By specifying the table name, you clarify which 'sno' column should be used in the query, ensuring there is no ambiguity.