Though the starting point of this tutorial is Java DB, be aware that these instructions are not applicable to Java DB only. Once the data access module is part of our application, we create a new module that provides the user interface for our application. For example, you will have learned about the UndoRedo. A prerequisite for following this tutorial is that you have already completed and understood the NetBeans Platform Quick Start, while NetBeans Platform for Beginners published in is very highly recommended.
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Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Under Constraints, select the Primary Key checkbox to specify that this column is the primary key for your table. All tables found in relational databases must contain a primary key. Note that when you select the Primary Key check box, the Index and Unique check boxes are also automatically selected and the Null check box is deselected. This is because primary keys are used to identify a unique row in the database, and by default are used as the table index.
Because all rows must be identified, primary keys cannot contain a Null value. When you are sure that your Create Table dialog contains the same specifications as those shown above, click OK. Beneath the table node the columns fields are listed, starting with the primary key. A blank canvas opens in the SQL Editor in the main window. Enter the following query in the SQL Editor.
In the Output window Ctrl-4 , a message displays indicating that the statement was successfully executed. To verify changes, right-click the Contact DB connection node in the Services window and choose Refresh. This updates the Runtime UI component to the current status of the specified database. Now that you have created one or more tables in the contact database, you can start populating it with data. There are several ways that you can add records to your table. The Output window displays a message indicating that the statement was successfully executed.
When you choose View Data, a query to select all the data from the table is automatically generated in the upper pane of the SQL Editor. The results of the statement are displayed in the lower pane of the SQL Editor. Note that a new row has been added with the data you just supplied from the SQL statement. Click the Insert Record s Alt-I button to add a row. The Insert Records dialog box appears.
Click in each cell and enter records. Note that for the cells with Date data type, you can choose a date from the calendar. Click OK when you are done. In the SQL Editor, you can sort the results by clicking on a row header, modify and delete existing records, and see the SQL script for the actions you are doing in the editor the Show SQL Script command from the pop-up menu. To delete a database table perform the following steps.
Issuing commands from an external SQL script is a popular way to manage your database. Perform the following steps to run the script on the contact database. Download colleagues. In the file browser navigate to the location of the saved colleagues. The script automatically opens in the SQL Editor. Alternatively, you can copy the contents of colleagues. Make sure your connection to Contact DB is selected from the Connection drop-down box in the tool bar at the top of the editor.
The script is executed against the selected database, and any feedback is generated in the Output window.
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