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Adobe® LiveCycle™ Designer 7.0 Providing interactive database lookup from forms

A crucial property of a relational DBMS is that it provides physical data independence. This allows physical structures such as indexes to change seamlessly without affecting the output of the query; but such changes do impact efficiency. Thus, together with the capabilities of the execution engine and the optimizer, the physical database design determines how efficiently a query is executed on a DBMS. The first generation of relational execution engines were relatively simple, targeted at OLTP, making index selection less of a problem. The importance of physical design was amplified as query optimizers became sophisticated to cope with. | TIP Adobe LiveCycle Designer 7.0 Providing interactive database lookup from forms Follow this tip to learn how to use LiveCycle Designer to write data to and retrieve information from databases. Using these features form designers can develop forms that allow users to blend manually entered information with enterprise data and display database record details in form fields based on selection criteria such as a key field. For example people can use printable forms to view supplier details based on part numbers or use an order form that populates fields such as color and size selectors based on model type. The following steps describe how to create a form that allows a user to look up merchandise information by selecting an ID and clicking a button to refresh the information displayed. They also show you how to define data connection and add code to populate the list with part number. Note This tip assumes that you have a Microsoft Access database file called purchase.mdb on your local computer. The database should contain a table called OfficeSupplies with the same field names and content as those in Table 1. A sample purchase.mdb and purchase.pdf are attached to this tip. ID PART_NO DESCRIPTION UNITPRICE 1 OS12324 Laser printer paper letter box of 5001 sheets 34.99 2 OS23561 Note pads 4inx6in box of 250 9.95 3 OS93851 Clear tape 12mmx33mm box of 100 19.99 4 OS40681 Letter size file folders beige 100 85.74 5 OS83955 Highlighting pens blue box of 12 8.56 6 OS11939 Felt stamp pad black 12 18 7 OS78869 Letter size white paper box of 5000 sheets 50.23 14 OS22222 Cabinet 22 15 OS33333 Sansonite 33 17 OS4444 Sony Walkman 23 19 OS54321 Cellular phone 111 20 OS6666 Tennis shoes 33 Table 1 Field names and sample data in the table of the attached database 1. Complete the following steps to set up a Data Source Name DSN to facilitate connecting to the database file From the Windows Control Panel select Administrative Tools Data Sources ODBC . Click the User DSN tab and select