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ADO technology презентация
Содержание
- 1. ADO technology
- 2. ADO ActiveX Data Object – data access
- 3. Components: - ADOConnection (inc. dbGo) ADOTable
- 4. Database model symbols (1) BASE.mdb
- 5. Database model based on АDO
- 6. Components attributes ADOConnection: Connection String –
- 7. Login Promt – password to database (false
- 8. ADOTable attributes: Connection – connection to database
- 9. DataSource attributes: DataSet – table resource connection
- 10. Google Google began in March 1998 as
- 11. PageRank It is given by PR(A) =
- 12. Thank you for attention! ☺
ADO ActiveX Data Object – data access technology, developed by Microsoft. (ActiveX-objects for data access).
Слайд 2ADO
ActiveX Data Object – data access technology, developed by Microsoft.
(ActiveX-objects for
data access).
Слайд 3Components:
- ADOConnection (inc. dbGo)
ADOTable (inc. dbGo)
ADOQuery (inc. dbGo)
DataSource (inc. Data
Access)
DBEdit (inc. DataControl)
DBNavigator
DBGrid
DBEdit (inc. DataControl)
DBNavigator
DBGrid
Слайд 5Database model based on АDO
BASE.mdb
start.exe
DataModule
AdoConnection
AdoTable1
AdoTable2
DataSource2
DataSource1
dbGrid1
dbGrid1
dbNavigator
dbEdit1
Слайд 6Components attributes
ADOConnection:
Connection String – path to database
(Connection String -> Build->
MicrosoftJet 4.0. OLE DB Provider -> Show path to database)
Path to database is provided relatively to current root directory!
Current root directory – is (path to folder, where executed file – exe located, i.е application)
Path to database is provided relatively to current root directory!
Current root directory – is (path to folder, where executed file – exe located, i.е application)
Слайд 7Login Promt – password to database (false - disconnect)
Connected – database
connection (true - connect)
ADOConnection:
Слайд 8ADOTable attributes:
Connection – connection to database due to component ADOConnection
TableName –
table name
Active – table connection activation (true – active, false – not active)
Active – table connection activation (true – active, false – not active)
ADOTable – database table
Слайд 9DataSource attributes:
DataSet – table resource connection (DataSet = AdoTable1)
DataSource – table
resource
DBGrid attributes:
DataSource – table resource to visual component connection (DataSource=DataSource1)
DBGrid – table
Слайд 10Google
Google began in March 1998 as a research project by Larry
Page and Sergey Brin, Ph.D. students at Stanford University.The domain google.com was registered on September 15, 1997.
Слайд 11PageRank
It is given by
PR(A) = (1-d) + d (PR(T1)/C(T1) + ...
+ PR(Tn)/C(Tn))
where
PR(A) is the PageRank of page A, PR(Ti) is the PageRank of pages. Ti which link to page A, C(Ti) is the number of outbound links on page. Ti and d is a damping factor which can be set between 0 and 1.
where
PR(A) is the PageRank of page A, PR(Ti) is the PageRank of pages. Ti which link to page A, C(Ti) is the number of outbound links on page. Ti and d is a damping factor which can be set between 0 and 1.
