Execute update java sql

The updateEmployee method expects a single argument from the caller, a Connection object that must be connected to an Advanced Server database:. Next, updateEmployee prompts the user for an employee name and number:. If executeUpdate returns without throwing an error, the call to System. The catch block displays an appropriate error message to the user if the program encounters an exception:. Note that in this example my MySQL database username is "root", my password is blank, and the MySQL database is running on the same computer where this program is run, so the database host name is "localhost".

Typically in a database program like this you'll end up updating rows based on the primary key of the database table. Specifically, in this example, you'd probably already know the "id" for the user Fred, and when you go to update Fred's data, you would normally do it like this:.

In "real world" Java database programs I almost always use the Spring JDBC libraries to access a database, but when you're first getting started, or working on small programs, I think it's important to see examples like this so you can understand how things work under the covers.

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Related Hot Network Questions. Question feed. Stack Overflow works best with JavaScript enabled. Now look at the values you're passing in your st. You need to check that value to determine if anything was updated. If you are seeing a zero, I would check the database. Patrick if the issue was with the database then I assume it wouldn't allow me to delete a record from the database as well right?

Show 5 more comments. I have made the change to my SQL statement but it still doesn't update the database.. FatmaTurk I updated this answer; you may want to try rearranging the order of your placeholder strings. Please see answer for more details. FatmaTurk No problem; and As you ask questions, don't forget to let the community know if an answer helps you by either upvoting an answer, or accepting the answer!

Could you try to add a e. Maybe there is a problem with your DB Hugues Hugues 3 3 silver badges 10 10 bronze badges. Sign up or log in Sign up using Google. Sign up using Facebook.