Tổng hợp tài liệu, ebook Cơ Sở Dữ Liệu tham khảo.
After you have created a layout, use the Print Setup command on the File menu bar. The interface below will appear with the following options: For Printer Name, you need to know which printer s of the university network are connected to your department or your username, which should be appeared on the 'Printer Name'. If you are not confident, as...
14 trang | Chia sẻ: thucuc2301 | Ngày: 21/11/2020 | Lượt xem: 603 | Lượt tải: 0
In this final step we will combine a series of themes within a scene to create a final map of the area suitable for a report. Delete all the themes within the 3d theme except the original TIN. Now add the following themes from the directory 'c:\arcv32\arcviewlAv~s30 \avtutor\3d\site2\ '; 'bldg.shp' , and 'roads.shp' as well as the image file - '...
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It is possible to select all the cells with certain characteristics - in this example where the rating equals '6'. With 'Map Calculation l ' active go to the 'Analysis' theme and select the 'Map Query' function. Enter the following query, by double clicking on 'Map Calculation L" (top layer), then single clicking on the '=' operator and finally ...
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In our final query, we wish to determine how may urban areas (polygons) fall within the buffers you created in the previous section (if you did not create the buffer polygon due to the selection of a graphic option, create a new theme of the buffers). Once again, this is a two stage processes. First of all, you make urban areas the active theme ...
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Return to ArcView, to make a jpeg image visible we firstly have to load the appropriate extension. Go to the 'File' menu and select 'Extensions ', check the box next to the 'JPEG (JFIF) Image Support' extension. Now open the image ('add theme') 'c:\temp\backdrop.jpg', remembering that it is an image data source that we require. To check if the i...
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Notice how the relevant 'states' attributes have now been added to the 'cities' table. The tables have not been physically linked and the results are only visible in this form within ArcView. To save the new table it either has to be exported and re-imported; or add new fields and use the 'calculator' to input the information. To return the tabl...
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In this step you will change the projection so that we can view the Europe in a different perspective. With the view active, click on 'View' in the menu bar. Click on 'Properties' in the dropdown menu. The View Properties menu opens, the name of the view should be 'The Europe. Click on the 'Projection.' button which is located approximately in th...
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Thứ tự thực hiện các trigger trong chương trình BEFORE statement trigger BEFORE row level trigger AFTER row level trigger AFTER statement level trigger
140 trang | Chia sẻ: thucuc2301 | Ngày: 21/11/2020 | Lượt xem: 843 | Lượt tải: 0
Nếu database ở chế độ ARCHIVELOG , tiến hành các bước sau: • Tắt database theo chế độ SHUTDOWN ABORT • Mount database • Phục hồi data file bị mất • Mở lại database
33 trang | Chia sẻ: thucuc2301 | Ngày: 21/11/2020 | Lượt xem: 707 | Lượt tải: 0
Hạn mức là dung lượng user được phép sử dụng trong 1 tablespace Có 2 loại hạn mức • Giá trị xác định (tính bằng MB hoặc KB) • Không có hạn mức
34 trang | Chia sẻ: thucuc2301 | Ngày: 21/11/2020 | Lượt xem: 945 | Lượt tải: 0