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JDBC has two pieces to it. the API (interfaces) that come with java, and the vendor-supplied database driver (implementation). In your case, because you are trying to connect to the Microsoft SQL server, have you downloaded their JDBC driver .jar file and placed it somewhere into the classpath that is accessible by netbeans or java applications (such as as the JRE/lib/ext/ folder
I'm pretty sure the default netbeans IDE would not come with the MS-SQL database (or any other database product for that matter). JDBC drivers.
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