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Cursors and Locks VB.NET

Posted Date: 29 Sep 2008 Resource Type: Articles Category: .NET Framework

Posted By: Athira Appukuttan Member Level: Diamond
Rating:

Points: 3

Cursors and Locks in VB:

Cursors:
They are 4 categories.
1. Forward only:
Fastest,can move only forward in recordset.
2.Static:
Can move to any record in the recodset.
datas are static and never changes.
3.Keyset:
Changes are detectadble.
Records that are deleted by other users are unavailable and records
created by other users are not detectable.
4. Dynamic:
All changes are visible.

Lockes:
They are 3.

1. Pessimistic:
Locks the rows once after any edit called.

2. Optimistic:
Lockes the rows only when update is called.

3. Batch Optimistic:
Allows batch updation.

4. Read only:
Read only Cannot alter the data.

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