Batch Class In Salesforce

Batch Class Code :-

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

global class batchContactupdate implements Database.Batchable<sObject> { global Database.QueryLocator start(Database.BatchableContext BC) { string Query='Select Name, Type from Contact'; return Database.getQueryLocator(Query); } global void execute(Database.BatchableContext BC, List<contact> scope) { for (Contact a : Scope) { a.Description='----This Description is updated by Batch Class------'; } update Scope; } global void finish(Database.BatchableContext BC) { } }

Developer Console Code :-

1 2	batchContactupdate xyz = new batchContactupdate(); database.executebatch(xyz);

Apex Job :-