An interface contains only the declaration of the methods, properties, and events, but not the implementation. It is the responsibility of the deriving class to implementation for all the members of the interface. By using Interface make easy to maintain a program. In C#, an interface can be defined using the interface keyword. For example, the following is a simple interface:

SQL select as clause with sql, tutorial, examples, insert, update, delete, select, join, database, table, join

A StringBuilder object is not a string StringBuilder object used for manipulating characters. StringBuilder object is mutable it means once we create string builder object we can perform any operation like insert, append, remove, and replace without creating new instance for every time.

C# strings with examples. In c# string is a collection of characters that is used to represent a particular text.

Observables are JavaScript objectsthat have the abilityto notify others when they have been changed. Supposed we have firstnameObservable type property and it used more than one places when we change firstname value that data is automatically reflected to all places wherever it is used.We create observables by using the ko.observable function:

Knockout provide client-side validation by using extender. It notifying to user when that value changes of input fields (input, textarea, select). The following demo Knockout validation via extender.

The SQL truncate table command is used to remove all rows (complete data) from a table. It is similar to delete statement , delete statement can use where clause but truncate statement can not use where clause.

The SQL DISTINCT keyword is used with the SELECT statement to eliminate the duplicate records and return only unique records. There may be a case when you have multiple duplicate records in a table. While getting such records, it will get only unique records instead of getting duplicate records.

The SQL DELETE keyword is used to delete the existing records from a table.

AngularJS provides a $http service for read the data from the server. It is used to retrieve the desired data from a server.