### Error updating database Cause javasqlSQLSyntaxErrorException Unknown column line_name in field list### The error may exist in comtraveltouristservicesystemdaoLineDaojava best guess### The error m

The error message suggests that there is an issue with updating the database due to a SQL syntax error. The specific error is "Unknown column 'line_name' in 'field list'".

The error is most likely in the LineDao.java file, specifically in the add method. It seems that the SQL statement used for inserting data into the 'attraction' table is incorrect. The 'line_name' column is not recognized, which is causing the error.

To fix this issue, you need to make sure that the 'line_name' column exists in the 'attraction' table. You can check the database schema and verify if the column is missing or has a different name. If it is missing, you can add the column to the table. If it has a different name, you need to update the SQL statement in the LineDao.java file to match the correct column name