2, there are two kinds of PB access way of backstage supporter's database, one is through the ODBC interface () the other is through a dedicated interface ()
3, ODBC refers to (open database connectivity)
4, sketchpad is our database in PB development environment (defining the database tables) (view) (index), and (query) (modified) (add or delete data),
5, ASA database is the USE of the default ID (DBA), the password is (SQL)
6, PB created in the Windows, menus, the data window object, such as
7, the original concept application is event-driven,
8, the table's primary key is (can be uniquely identifies each row of a column or set of columns)
10, we must use in the program script (transaction object) to have database
11, the essence of the PB is refers to the data (window)
12, a total of (11) PB data window style
13, PB with a total of (5) data source
14, we are the most commonly used data sources (Quick Select), is the most powerful data sources (SQLSelect data sources)
15, the data window object (design) (attributes) (preview) (column) (control key list) (data) Windows
16, FreeForm type data window we called (freestyle) type, its characteristic is (flexible layout, free)
17. (data window) is the core of the original concept of patent technology, it is composed of (data window object) and (data window control) of two parts,
18. Generally in the process of initialization of the application, use (connect) statements and database connection is established, in the open window, using the data window control object function (settransobject ()) or (settrans (), the data window control in relation to the transaction object, using the data window control object function (retrieve (), put the data in the database into the data window,
19, the original concept of the global transaction object become (sqlca)
20. Original concept of events and functions are collectively referred to as (method),
21. Custom function parameters of the transmission way of score, address, read-only pass three way,
22. In the process of creating data window, a total of five can choose the data source and 11 kinds of performance data window style,
23. When modified the data in the application after the dataobject properties window control, also need to in order to perform data window object function settransobject () and retrieve (), the new data window object can be displayed in the data window control,
24. Created in the database table, and defines the structure of the table, also must choose to insert into the row, to enter data into the table,
25. In the process of creating data window, two of the most commonly used the data source is the Quick select and SQL select,
26. Have cascading menus, drop-down menus and pop-up menus three types,
27. Powerscript provides four pronouns is this, the parent, parentwindow, super,
28, in the original concept, to provide five types of window, the window is the main window, __ child window __, __ the pop-up window, response type window _ and MDI frame window and smiling helps an MDI frame window,
29, the data window technology is original concept for developers to quickly build applications of powerful tools, also is the original concept with other object-oriented database front-end application development tool
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