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8 DAO
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DAODAOVBADAOAPISQL
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8-1 8-2 DAO 8-3
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8-1 DAOData Access ObjectDAOVBADAO
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8-1 () (R)Microsoft DAO 3.6 Object Library
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8-1 ()
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8-2 DAO8-2-1 8-2-2 8-2-3 8-2-4 8-2-5
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8-2-1 DAO ODBCAccess
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1. TransferDatabase 1.1 TransferDatabaseDocmd.TransferDatabase
acLink, acImport, acExportacLinkODBC
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1. TransferDatabase ()acTableFalse
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1. TransferDatabase ()DoCmd.TransferDatabase acLink, "ODBC ",
"ODBC; Driver={MySQL ODBC 3.51 Driver}; Server=Localhost;
Database=mysal; UID=; PWD=; Option=3 ", acTable, cuinfo, cuinfo,
FalseDoCmd.TransferDatabase acLink, "ODBC ", "ODBC; DSN=;
Database=mysal; UID=; PWD=; Option=3 ", acTable, cuinfo, cuinfo,
False
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1. TransferDatabase ()MySQLODBCDSNNameHostOn Open
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1.1 conModuleLinkTable Public Sub LinkTable(wdb as string, tbn
as string)DoCmd.TransferDatabase acLink, "ODBC ", "ODBC; Driver=
& _ {MySQL ODBC 3.51 Driver}; Server=Localhost; Database= &
wdb & ; & _ UID=; PWD=; Option=3 ", tbn, tbn, FalseEnd
Sub
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1.1 ()( On Open)Call LinkTable(,)Call
LinkTable(mysal,cuinfo)
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1.2 conModuledlTmptbl
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dlTmptbl1. Public Sub dlTmptbl(tbn As String)2. Dim tbl As
TableDef3. Dim db As Database4. Set db = CurrentDb5. With db6. For
Each tbl In db.TableDefs7. If tbl.Name = tbn Then8.
db.TableDefs.Delete tbl.Name9. Exit For10. End If11. Next tbl12.
End With13. End Sub
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dlTmptblOn Close 1. Dim db as database2. Dim rs as recordset3.
Set db = currentdb4. Set rs=db.OpenRecordset(Select * From sysTable
Where database= mysal)
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dlTmptbl() 5. With rs 6. Do while not .EOF 7. Call
dlTmptbl(rs!Table) 8. .movenext 9. Loop10. End With11. rs.close
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1.3 Set rs = db.OpenRecordset("cuinfo")Set rs =
db.OpenRecordset("Select * From cuinfo")Set qry =
db.CreateQueryDef("", "SQL")Set rs = qry.OpenRecordset()
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1.3 ()AccessDAOAccess
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1.4 SQL Dim qry As QueryDefSet qry = db.CreateQueryDef("",
"SQL")qry.Execute
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2. OpenDatabase Set workspace = CreateWorkspace(name, user,
password, type) Set database = workspace.OpenDatabase (dbname,
options, read-only, connect)
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2.
OpenDatabase():WorkspacenameuserAdminMySQLpasswordtypedbUseJet()|dbUseODBC()dbname(Jet)(ODBC)Options
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2. OpenDatabase()OptionsdbDriverNoPromptdbnameconnection
stringdbDriverPromptDSNDSNDSNdbDriverCompletedbDriverCompleteRequireddbDriverCompleteODBCread-onlyconnect
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2.1 - openDB1. Public ws As Workspace2. Public db As Database3.
Public As Recordset4. Public Sub openDB()5. Dim str As String6. Set
ws = DBEngine.CreateWorkspace("", Admin", "", dbUseJet)7. str =
"ODBC; DRIVER={MySQL ODBC 3.51 Driver}; SERVER = localhost;
DATABASE=mysal; UID=; PWD=; OPTION=38. Set db = ws.OpenDataBase("",
dbDriverNoPrompt, False, str)9.End Sub
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2.1 ()On Open Call openDB
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8-2-2 1. Set recordset = object.OpenRecordset (, , , ) Set rs =
con.OpenRecordset()Set rs = db.OpenRecordset()
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1. () Set recordset = object.OpenRecordset (, , ) Set rs =
qry.OpenRecordset()
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2.
SQLdbOpenTable(dbUseJet)dbOpenDynamic(dbUseODBC)dbOpenDynasetODBC
keyset dbOpenSnapshot, ODBC static dbOpenForwardOnly
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2. ()dbUseJetdbUseODBC
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2. () dbAppendOnly(dbUseJetdynaset)dbSQLPassThroughSQL(dbUseJet
snapshot-)dbSeeChanges(dbUseJetdynaset)
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2. - dbDenyWrite (dbUseJet)
dbDenyRead(dbUseJettable)dbRunAsync(ODBCDirect)
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2. - dbExecDirectSQLPrepareSQLExecDirect (ODBCDirect
)dbInconsistent(dbUseJetdynasetsnapshot)dbConsistent(dbUseJetdynasetsnapshot)
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2. - dbReadOnly(ODBCDirect)dbPessimisticEdit(Jet
)dbOptimisticUpdate(Jet
)dbOptimisticValue(ODBCDirect)dbOptimisticBatch(ODBCDirect)
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8-2-3 1. Set qry = object.CreateQueryDef (name, sqltext) qry
object
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1. ()nameobjectdbUseJetTransferDatabasesqltextSQLqryqry.SQL
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2. (Select) Set rs = qry.OpenRecordset()(Insert, Update,
Delete)qry.Execute options
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2.
()optionsdbDenyWrite(Jet)dbInconsistent(Jet)dbConsistent(Jet)dbSQLPassThroughSQL(Jet)
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2. ()dbFailOnError
(Jet)dbSeeChanges(Jet)dbRunAsync(ODBCDirect)dbExecDirectSQLPrepareODBC(ODBCDirect)
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8-2-4 rs.AddNew ()rs.Update rs!CU_Tel = Me!CU_TelMe!CU_Tel =
rs!CU_Tel
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8-2-4 () rs.FindFirstrs.FindFirst "CU_No ='" & Me!CU_No
& "'rs.FindNext rs.Nomatch
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8-2-4 () rs.Delete Style = vbYesNo + vbCritical +
vbDefaultButton2 rps = MsgBox("?", Style, "") If rps = vbYes Then
rs.Delete End If
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8-2-4 ()/ rs.Edit () rs.Update
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8-2-4 () Str2= Update rcpay, Set rcpay.CR_Spamt = rcpay!CR_Spamt
& _ + !Amount, rcpay.CR_Upamt = rcpay!CR_Upamt + &
_!Amount, .TR_Note = T & _WHERE ((([].[TR_Note]) Is Null));Set
qry2 = db.CreateQueryDef("", str2)qry2.Execute
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str1= Select spbill.SP_Blno, spbill.CU_No, splist.PD_No,
splist.SP_Qty, & _ cuquoat.UN_Price,
splist!SP_Qty*cuquoat!UN_Price AS Amount, & _ splist.TR_Note
FROM cuquoat Inner Join (spbill Inner Join splist ON & _
spbill.SP_Blno = splist.SP_Blno) ON (cuquoat.CU_No = spbill.CU_No)
& _ And (cuquoat.PD_No = splist.PD_No) Where (((splist.TR_Note)
Is Null)) & _ Order By spbill.CU_No;Set qry1 =
db.CreateQueryDef("", str1)Set rs1 = qry1.OpenRecordset()str2 =
Select * From rcpay Order By CU_No;Set rs2 =
db.OpenRecordset(str2)With rs1
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()Do While Not .EOF cu=!CU_No With rs2 .MoveFirst .FindFirst
CU_No = & cu & If Not .NoMatch Then .Edit !CR_Spamt =
!CR_Spamt + rs1!Amount !CR_Upamt =!CR_Upamt + rs1!Amount .Update
rs1.Edit rs1!TR_Note = T rs1.Update End If End With .MoveNext
LoopEnd Withrs1.Closers2.Close
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8-2-5 1. FindFirst FindFirst rs.FindFirst CU_No = & cu &
cu#FindNextFindLast
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8-2-5 ()2. MoveNextMovePreviousMoveFirstMoveLast3. rsRecordCount
4. rsFieldsCount 5. rs(i).Name
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8-2-5 ()6. rs()rs.Fields()rs.Fields.Item() rs(i)rs.Fields
(i)rs.Fields.Item(i)i 0 rs(i)rs! rs(i)rs!= For For i = 0 To
rs.Fields.Count 1 rs(i) ..Next i
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8-3 Access tblDa qryDa tblCmd
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8-3 () sqlDaSQL dtlData qryCmd
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