Schedule a Batch Class

Batch  Class :-

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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) { } }

Scheduled Class :-

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global class scheduledBatchable implements Schedulable { global void execute(SchedulableContext sc) { batchContactupdate b = new batchContactupdate(); database.executebatch(b); } }

Cron Expression :-

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scheduledBatchable sc = new scheduledBatchable(); String sch = '0 5 * * * ?'; String jobID = system.schedule('Update Contact Job', sch, sc);

Scheduled Jobs :-

Apex Jobs :-