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CHAPTER 3 DOMAIN-SPECIFIC LANGUAGES 101: LOLA S LUNCH COUNTER
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Figure 3-47. The Condiments table Finally, Figure 3-48 shows the values in the Stuffs table, which includes a single many-to-one relationship: Order 4 has two Stuff values (Grilled Tofu and Portabella). Again, this is confirmed by the expression of the fourth order in the list: Grilled Tofu & Portabella in Pita with Lettuce. So the database instances appear to be entirely consistent with the model.
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Figure 3-48. The Stuffs table You may have notice that under the LunchCounter database item in the Object Explorer pane of SSMS is an item called Database Diagrams. Let s see if you can generate a diagram of the five tables. Click on the Database Diagrams item, and you will more than likely get a message window like that shown in Figure 3-49, asking if you would like to generate the support objects required to use database diagramming. Click the Yes button to generate the support objects.
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Figure 3-49. Setting up to generate a database diagram Once this happens, you can right-click on Database Diagrams and select New Database Diagram (see Figure 3-50).
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Figure 3-50. Creating a new a database diagram A multi-select Add Table dialog box will pop up to allow you to select the database tables you want to appear in the diagram. Use the Ctrl key to multi-select the Breads, Condiments, SandwichOrders, and Stuffs tables, click the Add button, and then the Close button.
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CHAPTER 3 DOMAIN-SPECIFIC LANGUAGES 101: LOLA S LUNCH COUNTER
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Figure 3-51. Selecting the LunchCounter database tables to display in the diagram Figure 3-52 shows the diagram of the four tables and their relationships. Diagramming is a powerful tool in SQL Server, and there is a lot of functionality provided in the diagramming tools. Covering these features is beyond the scope of this book, but I hope I ve provided at least a taste of how the SQL Server Modeling tools can be used in conjunction with the traditional SQL Server tools (such as SSMS and Visual Studio) to create and deploy your own data models and model-based applications.
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CHAPTER 3 DOMAIN-SPECIFIC LANGUAGES 101: LOLA S LUNCH COUNTER
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Figure 3-52. LunchCounter database diagram displayed in SSMS You could also use a JOIN select statement to create a consolidated view of the sandwich orders. To do this, close the Object Explorer pane by clicking the X in the upper-right corner of the Object Explorer pane. Click New Query on the tool ribbon (Figure 3-53). Click the Query menu item, then choose the Design Query in Editor option (see Figure 3-53).
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CHAPTER 3 DOMAIN-SPECIFIC LANGUAGES 101: LOLA S LUNCH COUNTER
Figure 3-53. Setting up to design the query in the Query editor
CHAPTER 3 DOMAIN-SPECIFIC LANGUAGES 101: LOLA S LUNCH COUNTER
Figure 3-54. Selecting the LunchCounter tables for the JOIN query This will bring up an empty Query Designer window, with an Add Table dialog box (Figure 3-54). Select the four LunchCounter tables in the following order, clicking the Add button after each selection: SandwichOrders (LunchCounter) Stuffs (LunchCounter) Breads (LunchCounter) Condiments (LunchCounter)
This should result in a table diagram similar to that shown in the upper pane of the Query Designer (see Figure 3-55). Click the Close button on the Add Table dialog box and rearrange the tables to make the diagram more readable.
CHAPTER 3 DOMAIN-SPECIFIC LANGUAGES 101: LOLA S LUNCH COUNTER
Figure 3-55. After rearranging the table diagram and preparing to select the display columns Now you re ready to select the display columns for the query. Click in the topmost cell of the left column, and you should see a drop-down menu from which you can select the first display column (see Figure 3-56, which shows the drop-down menu for the fourth column after setting up the first three column definitions).
CHAPTER 3 DOMAIN-SPECIFIC LANGUAGES 101: LOLA S LUNCH COUNTER
Figure 3-56. Selecting the display columns for the JOIN query Set up the display columns according to the column, aliases, and table names shown in Table 3-1. Table 3-1. Display Column Configuration for the Query
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