Database Error

What This Error Means

This error occurs when there is a mismatch between the query parameter and the named parameter in a SQL query.

Why It Happens

This error typically happens when you're using a parameterized query with a named parameter, but you haven't passed the value for that parameter. In this case, the parameter 'email' is specified in the query, but its value is not provided.

How to Fix It

1. 1To fix this error, make sure to pass the value for the 'email' parameter when executing the query. You can do this by adding the parameter to the query's parameter map, like this:
2. 2// Before (broken code)
3. 3PreparedStatement ps = connection.prepareStatement("SELECT * FROM users WHERE email = :email");
4. 4// After (fixed code)
5. 5PreparedStatement ps = connection.prepareStatement("SELECT * FROM users WHERE email = :email");
6. 6ps.setString(1, "user@example.com");

Example Code Solution

PreparedStatement ps = connection.prepareStatement("SELECT * FROM users WHERE email = :email");

PreparedStatement ps = connection.prepareStatement("SELECT * FROM users WHERE email = :email");
ps.setString(1, "user@example.com");
executeQuery(ps);