Скачать или смотреть Troubleshooting JDBC SQL Query Execution: Fix Your SQL Result Set Error

Discover how to resolve the common JDBC `SQLException` occurring during SQL query execution in Java. Learn why using `executeQuery()` was the problem and how to correct it.
---
This video is based on the question https://stackoverflow.com/q/71258006/ asked by the user 'ibs' ( https://stackoverflow.com/u/18206101/ ) and on the answer https://stackoverflow.com/a/71258095/ provided by the user 'cbender' ( https://stackoverflow.com/u/2464528/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Trouble with SQL query execution using JDBC. getting error with result set

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Troubleshooting JDBC SQL Query Execution: Fix Your SQL Result Set Error

Are you facing trouble executing SQL queries in your Java project using JDBC? Have you encountered the dreaded java.sql.SQLException: Statement.executeQuery() cannot issue statements that do not produce result sets error? If so, you're not alone and you've come to the right place for help.

Understanding the Problem

The error you’re experiencing typically arises when trying to execute a statement that does not produce a result set using executeQuery(). This method is specifically designed for SQL SELECT statements that return data. However, when you're using SQL commands such as INSERT, UPDATE, or DELETE, which do not return any results, you'll encounter this error.

Let's take a closer look at the code snippet that is causing the issue:

[[See Video to Reveal this Text or Code Snippet]]

In your case, this line is problematic because it attempts to execute an INSERT statement while expecting a ResultSet. Here’s the definition of your statement:

[[See Video to Reveal this Text or Code Snippet]]

This is an INSERT operation, which should not return results, hence the error.

The Solution: Use executeUpdate()

To resolve this issue, you should replace the executeQuery() method with executeUpdate(). The executeUpdate() method is meant to handle SQL statements that change data (like INSERT, UPDATE, and DELETE). Here’s how to implement this change:

Updated Code Snippet

Replace the problematic line with the following:

[[See Video to Reveal this Text or Code Snippet]]

The full relevant code portion would look something like this:

[[See Video to Reveal this Text or Code Snippet]]

Key Points to Remember

Use executeQuery() for SELECT statements that retrieve data.

Use executeUpdate() for INSERT, UPDATE, and DELETE operations.

Always handle different SQL operations with the appropriate method to avoid exceptions and ensure your application runs smoothly.

Conclusion

By understanding the difference between executeQuery() and executeUpdate(), you can easily fix the exception issues you're experiencing in your JDBC SQL implementations. Correctly applying these methods will not only help you resolve the current error but also improve your overall code efficiency in handling SQL operations.

If you still have questions or need further assistance, feel free to reach out. Happy coding!