Dynamic updatepanel not updating
If there is any violation between the constraint and the data action, the action is aborted by the constraint.
Constraints can be specified when the table is created (inside the CREATE TABLE statement) or after the table is created (inside the ALTER TABLE statement).
Keyset-driven: Only updated data can be viewed, deleted and inserted data cannot be viewed.
Constraint SQL Constraints SQL constraints are used to specify rules for the data in a table.
Methods Conclusion So far we have seen the Array List and its members and properties.
If you have any queries or further clarifications about Array List then please free to post your feedback and corrections.5. Cursors A cursor is a database object that helps in accessing and manipulating data in a given result set.SCOPE_IDENTITY returns values inserted only within the current scope. Delegates and Events The delegate topic seems to be confusing and tough for most developers. Delegate is a class to create delegates at runtime.This article explains the basics of delegates and event handling in C# in a simple manner. A delegate in C# is similar to a function pointer in C or C . A delegate is a very special type of object since earlier the entire the object was used to defined contained data but a delegate just contains the details of a method.Cursors, therefore, serve as a mechanism for applications to operate on a single row or a set of rows.Cursors enable the processing of rows in the given result set in the following ways:/* Create two variables that would store the values returned by the fetch statement */DECLARE @Department Name char(25)DECLARE @Department Head char(25)/* Define the cursor that can be used to access the records of the table,row by row */DECLARE cur Department cursor for SELECT v Department Name,v Department Head from Department-- Open the cursor OPEN cur Department-- Fetch the rows into variables FETCH cur Department into @Department Name,@Department Head--Start a loop to display all the rows of the cursor WHILE(@@fetch_status=0)BEGINPrint 'Department Name =' @Department Name Print 'Department Head =' @Department Head--Fetch the next row from the cursor FETCH cur Department into @Department Name,@Department Head END-- Close the cursor CLOSE cur Department-- Deallocate the cursor DEALLOCATE cur Department The following are various types of cursors available in SQL Server 2005: Base table: Base table cursors are the lowest level of cursor available.