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- *501010
- C13,0
- x╨ÇΦ
- rââΦ ╠─
- q╧ÿΦN,,,,,,
- a7,P,,,,,,
- *501020
- C15,0
- räú° Session 5
- Z1.0
- rÅú° ∙ Queries
- q╧ÿ╕P,2,,,,,
- a1,P,,,,,,
- *501030
- C2,0
- rëèÉIn this session you will:
- ræì°∙
- ròìÉDesign a view query for your database file
- ræÅ°∙
- ròÅÉSave the view query
- rææ°∙
- ròæÉView data resulting from the view query
- rªÿ≡Press
- r¡ÿ°──┘
- r▒ÿ≡ to continue or
- r├ÿ°F5
- r┼ÿ≡ to exit
- q╧ÿ╕S,,,,,,
- QC1
- a7,G,,,,,,
- a8,P,,,,&H0D,,
- a8,C,D002,,,&H003F,,
- *501040
- C7,0
- rëè╕ Ö
- ræì╕ «
- ræÅ╕ ù
- rææ╕ ½
- q╧ÿ╕P,1,,,,,
- a1,P,,,,,,
- *501050
- C2,0
- rëêÉView queries allow you to filter the data in your file.
- rëèÉSuppose you want a list of books published in 1986 and
- rëîÉlater. The list should contain:
- rùÄÉthe
- r¢Ä≡year
- rƒÄÉ of publication
- rùÉÉthe
- r¢É≡title
- ráÉÉ of the book
- rëôÉNone of the other information in the database is needed.
- q╧ÿÉS,,,,,,
- QC1
- a7,G,,,,,,
- a8,P,,,,&H0D,,
- a8,C,D002,,,&H003F,,
- *501060
- C11,0
- rëê╪ ┴
- rëè╪ ╗
- rëî╪ ║
- rëÄ╪ ╖
- rëÉ╪ ╕
- rëô╕ ╕
- q╧ÿ╕P,1,,,,,
- a1,P,,,,,,
- *501070
- C2,0
- rëçÉBefore printing such a list, you need to tell dBASE IV
- rëëÉwhich pieces of information you require:
- ræîÉYou need records only of books published
- ræÄÉafter 1985.
- rææÉYou need only two fields from each record,
- ræôÉYear and Title.
- q╧ÿ╕S,,,,,,
- QC1
- a7,G,,,,,,
- a8,P,,,,&H0D,,
- a8,C,D002,,,&H003F,,
- *501080
- C11,0
- rëç╪ ║
- rëë╪ ⌐
- ræî╪ ░
- ræÄ╪ ¢
- rææ╪ ½
- ræô╪ Å
- q╧ÿ╕P,1,,,,,
- a1,P,,,,,,
- *501090
- C2,0
- rëèÉTo retrieve only certain information from a file,
- rëîÉyou create a
- rûî≡view query
- ráîÉ, which acts as a filter.
- rëÄÉThe original data remains unchanged, and you see only
- rëÉÉthe information you specify.
- q╧ÿ╕S,,,,,,
- QC1
- a7,G,,,,,,
- a8,P,,,,&H0D,,
- a8,C,D002,,,&H003F,,
- *501100
- C7,0
- rëè╕ ╡
- rëî╕ ╢
- rëÄ╕ ╢
- rëÉ╕ £
- q╧ÿΦP,1,,,,,
- a1,P,,,,,,
- *501102
- C14,0
- rëê≡Please note.
- rëèÉDuring this session, you will use the F5 key several times
- rëîÉto perform a dBASE IV operation. On those screens, F5 will
- rëÄÉnot be available to exit the tutorial.
- q╧ÿ╕S,,,,,,
- QC1
- a7,G,,,,,,
- a8,P,,,,&H0D,,
- a8,C,D002,,,&H003F,,
- *501104
- C7,0
- rëê╕ î
- rëè╕ ║
- rëî╕ ║
- rëÄ╕ ª
- q╧ÿ╕P,1,,,,,
- a1,P,,,,,,
- *501110
- C2,0
- rëèÉTo create a view query, you'll begin at the Control Center.
- rëìÉPress
- rÉì°──┘
- röìÉ to continue.
- q╧ÿ╕S,,,,,,
- QC1
- a7,G,,,,,,
- a8,P,,,,&H0D,,
- a8,C,D002,,,&H003F,,
- *501120
- C13,0
- rââΦ ╠
- rëèΦ ╗
- rëìΦ Ö
- rªÿΦ ¬
- q╧ÿΦP,1,,,,,
- a1,C,D502,,,,,