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- 0, In this demonstration, you will see how to use
- 5, database diagrams in Visual InterDev to modify the
- 9, structure of a SQL server database. In my project I
- 14, have added a data connection to a Microsoft SQL
- 18, server database. When you add a data connection, the
- 21, Data View tab is added to your workspace window.
- 26, From Data View you can create a database diagram.
- 30, To create a new database diagram, from the Insert
- 34, menu, click New Database Item. Select Database
- 39, Diagram and click OK. The Database Diagram toolbar is
- 47, displayed. To add tables to the diagram, drag the
- 52, table from data view to the diagram window. I'll
- 57, add Classes, Enrollment, and Students to the
- 60, diagram. If the tables are related, a join line appears
- 76, in the diagram. If you move your cursor over the
- 80, join line, pop-up text displays information on the
- 84, join. To create a relationship between two tables,
- 89, drag a field from one table to another. I'll
- 93, create a relationship between Enrollment and Classes.
- 98, In the Create Relationship dialog box, you can
- 102, specify properties of the relationship, and click OK.
- 109, To change the structure of a table, click the
- 113, Show Columns property on the Database Diagram
- 116, toolbar. You can change the definition of existing
- 121, columns and add new columns. I'll add an "Instructor"
- 127, column to the Classes table. You can also add new
- 140, tables to your database. To add new tables, click New
- 145, Table on the Database Diagram toolbar. All of the
- 152, changes that you make to the database are
- 154, temporary until you save the diagram. To see an SQL script
- 161, of your changes, click the Save Change Script
- 164, icon. You can save this script to a text file and
- 170, then use a tool, such as ISQL, to apply the changes
- 175, at a later date. I'll save my diagram and apply the
- 180, changes immediately. If I now look at the design
- 195, of the Classes table, you will see the new column,
- 199, Instructor, has been added to the table. So, in
- 205, this demonstration you have seen how to use
- 208, database diagrams to modify the structure of a SQL
- 212, server database.
- 216, END
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