Oracle updating recordset during cursor


22-Jan-2018 20:55

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A Boolean value indicating whether or not to force the changes into the database, regardless of whether the underlying data has been changed by another user since the Add New, Delete, or Edit call. Close End Sub Sub Update X2() Dim dbs Northwind As Database Dim rst Employees As Recordset Dim str Old First As String Dim str Old Last As String Dim str Message As String Set dbs Northwind = Open Database("Northwind.mdb") Set rst Employees = _ dbs Northwind. " If Msg Box(str Message, vb Yes No Cancel) = vb Yes Then .

If True, the changes are forced and changes made by other users are simply overwritten. Update ' Go to the new record and show the resulting data.

To revert to the record as the other user changed it, refresh the current record by using To add, edit, or delete a record, there must be a unique index on the record in the underlying data source.

If not, a "Permission denied" error will occur on the Add New, Delete, or Edit method call in a Microsoft Access workspace, or an "Invalid argument" error will occur on the Update call in an ODBCDirect workspace.

Close End Sub Sub Add New X() Dim dbs Northwind As Database Dim rst Employees As Recordset Dim str First Name As String Dim str Last Name As String Set dbs Northwind = Open Database("Northwind.mdb") Set rst Employees = _ dbs Northwind. Close End Sub Function Add Name(rst Temp As Recordset, _ str First As String, str Last As String) ' Adds a new record to a Recordset using the data passed ' by the calling procedure.

create table Employee( 2 ID VARCHAR2(4 BYTE) NOT NULL, 3 First_Name VARCHAR2(10 BYTE), 4 Last_Name VARCHAR2(10 BYTE), 5 Start_Date DATE, 6 End_Date DATE, 7 Salary Number(8,2), 8 City VARCHAR2(10 BYTE), 9 Description VARCHAR2(15 BYTE) 10 ) 11 / Table created.

This is a complete book on PL/SQL with everything you need to know to write efficient and complex PL/SQL code.

Here are the answers to the PL/SQL Challenge questions in last issue’s “Error Management” article: Answer 1: Choices (a), (c), and (d) all raise ORA-00001, also known as DUP_VAL_ON_INDEX inside PL/SQL code.

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When the Fetch clause is used with a cursor having a FOR UPDATE clause, the PL/SQL unit fails when we try to open the cursor with an ORA-02014: cannot select FOR UPDATE from view with DISTINCT, GROUP BY, etc. The error description shows that the internal mechanism for the Fetch clause uses either a DISTINCT or a GROUP BY clause which is not permitted alongside the FOR UPDATE clause.

If the Lock Edits property setting is False (optimistically locked), the record is locked and compared with the pre-edited record just before it is updated in the database. Last Name = "Kobara" ' Show contents of buffer and get user input.

If the record has changed since you used the Edit method, the Update operation fails. str Message = "Edit in progress:" & vb Cr & _ " Original data = " & str Old First & " " & _ str Old Last & vb Cr & " Data in buffer = " & _ ! Last Name & vb Cr & vb Cr & _ "Use Update to replace the original data with " & _ "the buffered data in the Recordset?

Sub Update X() Dim dbs Northwind As Database Dim rst Employees As Recordset Dim str Old First As String Dim str Old Last As String Dim str Message As String Set dbs Northwind = Open Database("Northwind.mdb") Set rst Employees = _ dbs Northwind.

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str Message = "Add New in progress:" & vb Cr & _ " Data in buffer = " & ! Last Name & vb Cr & vb Cr & _ "Use Update to save buffer to recordset?

In this scenario, the cursor result set can be limited using the traditional When we associate a SELECT statement with more than one table joined together to a cursor with a FOR UPDATE clause, we end up locking all the tables in the FROM clause of the SELECT statement, where we just need to lock a single table for our purpose.