??sa???? st?? ??se?? ?ed? - PowerPoint PPT Presentation

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??sa???? st?? ??se?? ?ed?

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Title: 1 Author: Dorita Last modified by: manolopo Created Date: 10/4/2004 5:46:47 PM Document presentation format: On-screen Show Company: JimBeam Other titles – PowerPoint PPT presentation

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Title: ??sa???? st?? ??se?? ?ed?


1
1
  • ??sa???? st?? ??se?? ?ed?µ????
  • ?????? ?p????e?s?? ?a? ??a?e???s?? ?ed?µ????
  • S?st?µata ???e???
  • S?st?µata ??se?? ?ed?µ????
  • ?a?ad?s?a??? ?a? S??????e? ?fa?µ????

2
?ef??a?? 1 ??sa???? st?? ??se?? ?ed?µ????
?????? ??a?e???s?? ?ed?µ????
  • ?a ded?µ??a s?µe?a ?p?????? pa?t?? ?a? s?ed?? ta
    p??ta ?ata???f??ta?. ???s?µ?p?????ta? se ???e
    ??ße???t???, st?at??t???, pa?a??????, eµp?????,
    ep?st?µ????? d?ast????t?ta.
  • ?? µe???e? p?s?t?te? ded?µ???? ep?ß?????? t??
    e??es? ap?te?esµat???? µe??d?? ap????e?s??. ?a
    ded?µ??a p??pe? ?a e??a? ???a??µ??a ?ste ?a
    d?e??????eta? ? a?a??t?s? ?a? ? e??µ???s? t???.
  • ?ed?µ??a ????? s???e???µ??? d?µ? ep?f?????
    p??ß??µata. ? ??a?e???s? ?ed?µ???? (data
    management) as???e?ta? µe ta p??ß??µata a?t?.

3
?ef??a?? 1 ??sa???? st?? ??se?? ?ed?µ????
S?st?µata ???e??? ? a????? p??s????s?
  • ???? t?? eµf???s? t?? ß?se?? ded?µ????, ?
    ap?-???e?s? ?a? ? d?a?e???s? t?? ded?µ???? ?ta?
    st?? e????? t?? p????aµµ?t?? efa?µ????.
  • ? ap????e?s? t?? ded?µ???? ????ta? se a??e?a t??
    ?e?t???????? s?st?µat??.
  • ? a?????s?, ap????e?s? ?a? e??µ???s? t??
    ded?-µ???? a???e st?? e????? t?? p????aµµat?st?
    t?? efa?µ????.

4
?ef??a?? 1 ??sa???? st?? ??se?? ?ed?µ????
S?st?µata ???e??? ? a????? p??s????s?
5
?ef??a?? 1 ??sa???? st?? ??se?? ?ed?µ????
?e???e?t?µata ? e????? t?? p????aµµat?st?
  • ? p????aµµat?st?? t?? efa?µ???? e??a? ?pe??????
    ??a t? s?st? e??µ???s? t?? a??e??? t?? ded?µ????,
    a?????a µe t?? e?sa????? ?a? t?? d?a??af?? p??
    p?a?µat?p?????ta?.
  • ?at? t?? a?a??t?s? st???e??? ?a p??pe? se p??t?
    st?d?? ?a p??sd????st??? ta a??e?a p??
    apa?t???ta? ?a? se de?te?? st?d?? ?a ???e?
    p??se?t??? a?????s? t?? ded?µ????, s??d?????ta?
    ?at?????a t?? p????f???e? p?? pe??????? ta
    d?af??et??? a??e?a.
  • ? ?at?stas? d?s???e?e? ?s? a????eta? ? a???µ??
    t?? a??e??? ded?µ???? ?a? ?s? a????eta? ?
    p???p????t?ta t?? e??t?µ?t??.

6
?ef??a?? 1 ??sa???? st?? ??se?? ?ed?µ????
?e???e?t?µata ? d?µ? t?? a??e???
  • ? d?µ? t?? a??e??? ?a?????eta? ap? t?? efa?µ???.
    ??t? ??e? ?? ap?t??esµa ?a e??a? d?s???? ? a??a??
    t?? d?µ?? e??? a??e???.
  • ?????? f???? pa???s???eta? ? a????? ?a p??ste?e?
    ??a ??? ?a?a?t???st??? sta ded?µ??a. Se µ?a
    t?t??a pe??pt?s? p??pe? afe??? ?a µetaß???e? ?
    d?µ? t?? a??e??? ?ste ?a d?µ???????e? ????? ??a
    t? ??? ped??, ?a? afet???? ?a µetaß???e? ? ??????
    t?? efa?µ???? ?ste ?a ??f?e? t? ??? ped?? ?p???
    ?at? t?? a?a??t?s?, e?sa???? ?a? d?a??af?
    ded?µ????.
  • ?? a??a??? a?t?? e??a? ?????ß??e? ?a? ep????d??e?
    ??a t?? a?e?a??t?ta t?? ded?µ????.

7
?ef??a?? 1 ??sa???? st?? ??se?? ?ed?µ????
?e???e?t?µata ep????d???? p????a??sµ??
  • ?f?s?? ? t??p?? d?µ??????a? t?? a??e???
    ?a?????eta? ap? t?? efa?µ???, ? µ??f?p???s? t??
    a??e??? e?a?-t?ta? ap? t?? e??st?te ???ssa
    p????aµµat?sµ??.
  • ?? ?e????? a?t? d?µ?????e? d?s????e? ?ta?
    apa?te?ta? ? ???s? t?? a??e??? ap? d?af??et????
    efa?µ???? ? ?ta? apa?te?ta? ? ?atas?e?? t??
    a??e??? ap? d?af?-?et????? p????aµµat?st?? p??
    ???s?µ?p????? d?af?-?et???? ???sse?
    p????aµµat?sµ?? se d?af??et??? ?e?t???????
    s?st?µata.
  • ?? p??ß??µa e??a? ?d?a?te?a ??t??? ?ta? ta
    ded?µ??a ap????e???ta? se d?ad??? (binary) µ??f?
    ?a? ??? se a?fa???µ?t??? (alphanumeric, text)
    µ??f?.

8
?ef??a?? 1 ??sa???? st?? ??se?? ?ed?µ????
?e???e?t?µata ta?t?????e? p???e??
  • Se p????? pe??pt?se?? ? efa?µ??? e??p??ete?
    p?????? ???ste? ta?t?????a. ? d?asf???s? t??
    p??stas?a? ?a? t?? a?e?a??t?ta? t?? ded?µ????
    ?at? t?? ta?t?????? a?a??t?s?, e?sa???? ?a?
    d?a??af? st???e??? e??a? a??et? pe??p???? (p?.
    ??at?se?? ??se??).
  • ?p?s??, se s???e???µ??e? ?e?t?????e? p??pe? ?a
    d?asfa-???eta? ? at?µ???t?ta t?? e?t??es?? (p?.
    t?ape????? s??a??a???).

9
?ef??a?? 1 ??sa???? st?? ??se?? ?ed?µ????
?e???e?t?µata d??a??µata ???st??
  • St? ?e???? pe??pt?s?, ???e ???st?? t?? efa?µ????
    ??e? d?af??et??? d??a??µata s?et??? µe t??
    p??sp??as? t?? ded?µ????.
  • ? efa?µ??? t?? ?a????? p??stas?a? t?? ded?µ????
    ?ste ?a ap?fe????ta? d?s??este? ?atast?se??
    ap?-?e?a? ded?µ???? (e?te ?at? ?????, e?te
    es?eµµ??a) st?????µe??? sta e??a?e?a t??
    ?e?t???????? s?st?µat?? e??a? d?s???a ?at????t?.
  • ?p?p????, e??a? p??? d?s???? ?a ???s??µe
    d?af??et??? d??a??µata µ?sa st? ?d?? a??e??.

10
?ef??a?? 1 ??sa???? st?? ??se?? ?ed?µ????
?e???e?t?µata d?s?aµ??a sta e??t?µata
  • ?f?s?? ? ?????? t?? a?a??t?s?? st???e??? ap? ta
    a??e?a ded?µ???? ???p??e?ta? st?? ??d??a t??
    efa?µ????, ?? d?af??et???? t?p?? e??t?µ?t?? p??
    µp??e? ?a de??e? ? efa?µ??? e??a? pe?????sµ????
    ?a? p??pe? ?a ???p??????? e? t?? p??t????.
  • ??t? ap?te?e? a??et? desµe?t??? pa?????ta
    ?aµß????ta? ?p??? ?t? e??a? s?ed?? ad??at? ?a
    p??ß?????µe ??a ta d??at? e??t?µata p?? µp??e? ?a
    ep???µe? ?a ??se? ??a? ???st??.

11
?ef??a?? 1 ??sa???? st?? ??se?? ?ed?µ????
??se?? ?ed?µ???? ? e?a??a?t??? p??s????s?
  • ??s? ?ed?µ???? (database) ap?te?e? µ?a s??????
    st???e??? s?et???? µeta?? t??? ta ?p??a e??a?
    d?µ?µ??a ?a? ?ata????sµ??a µe ?at?????? t??p?.
  • S?st?µa ??a?e???s?? ??se?? ?ed?µ???? (database
    management system) e??a? µ?a s?????? ????sµ????,
    ? ?p??a ???p??e? ??e? ?? ?e?t?????e? p?? p??pe?
    ?a ?p?st????????, ?p?? a?a??t?s?, e?sa????,
    d?a??af?, s???????sµ?? p??spe??se??, p??stas?a
    ?a? p????? a??µ?.
  • S?st?µa ??s?? ?ed?µ???? (database system) e??a?
    µ?a ?? µa?? µe t? a?t?st???? ????sµ??? S???.

12
?ef??a?? 1 ??sa???? st?? ??se?? ?ed?µ????
??se?? ?ed?µ???? ? e?a??a?t??? p??s????s?
13
?ef??a?? 1 ??sa???? st?? ??se?? ?ed?µ????
??se?? ?ed?µ???? ? e?a??a?t??? p??s????s?
  • ??e??e?t?µata
  • ?e????af? ?ed?µ???? (µetaded?µ??a ded?µ??a ??a
    ta ded?µ??a, ?at?????? s?st?µat??).
  • ??e?a?t?s?a ?ed?µ???? ?a? ?e?t??????? (de?
    a??????? ta p?????µµata efa?µ???? ?ta? a???????
    ta ded?µ??a).
  • ?p?d?t???te?? ??a?e???s? ?ed?µ???? (?
    p????aµ-µat?st?? ep??e?t???eta? st?? efa?µ??? ?a?
    ??? sta ded?µ??a ?a? t??? a??????µ???
    epe?e??as?a? t???).

14
?ef??a?? 1 ??sa???? st?? ??se?? ?ed?µ????
??se?? ?ed?µ???? ? e?a??a?t??? p??s????s?
  • ??e??e?t?µata
  • ???stas?a ?ed?µ???? ?a? ???a??µata ???st??
  • (??a ???e s????? ded?µ???? ?e????st?).
  • ???a??sµ?? ?a?t??????? ???sp??as??
    (p??sf???-?ta? ap? t? s?st?µa µ??a??sµ??
    ??e?da????).
  • ?pe?tas?µ?t?ta (se µe??d???, ???ste?, ded?µ??a,
    efa?µ????, ?p?????st??, d?s???? ??p).

15
?ef??a?? 1 ??sa???? st?? ??se?? ?ed?µ????
?a?ad?s?a??? ?fa?µ????
  • ??s??d?s?a
  • ??at?se?? T?se??
  • ??ape????? S??a??a???
  • ??a?e???s? ?ta?????? ?ed?µ????
  • ?µes? ?pe?e??as?a S??a??a??? (On-line
    transaction processing - OLTP)

16
?ef??a?? 1 ??sa???? st?? ??se?? ?ed?µ????
S??????e? ?fa?µ????
  • ????µes???? efa?µ???? (multimedia DBs)
  • ??a?e???s? ?e???af???? p????f????? (GIS)
  • ?µes? a?a??t??? epe?e??as?a (OLAP)
  • ??????? ded?µ???? (data mining)
  • ????t?s? p????f???a? (information retrieval)
  • ??a?e???s? ?????µe??? a?t??e?µ???? (moving
    objects)
  • ????t?? ?p?????sµ?? (mobile computing)
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