How to run a scheduled job every 15 mins?

Hi Suraj,

You can write a Batch Class and then Schedule it with the help of a scheduler.Let me explain it to you with the help of an example:

BATCH CLASS :

global class test_BATCH implements Database.Batchable<sObject> {
global (Database.QueryLocator | Iterable<sObject>) start(Database.BatchableContext BC) {

String query = 'SELECT Id,Name FROM Account';

return Database.getQueryLocator(query);

}

global void execute(Database.BatchableContext BC, List<Account> scope) {

for(Account a : scope){

a.Name = a.Name + 'Updated';

}

update scope;

}

global void finish(Database.BatchableContext BC) {

}
}

SCHEDULABLE CLASS :
global class scheduledBatchable implements Schedulable{
global void execute(SchedulableContext sc) {

test_BATCH b = new test_BATCH();
//Parameters of ExecuteBatch(context,BatchSize) database.executebatch(b,10);

}

}

***Note: if batch size is not mentioned it is 200 by default.

CUSTOM TIMING
String time = '0 0 * * * ?';

SheduledBatchable sch = new scheduledBatchable();

system.schedule('Hourly Example Batch Schedule job', time, sch);

*****If you want to run it as frequent as 15,30 or N mins .....
String time = '0 15 * * * ?' ;

String time = '0 30 * * * ?' ;

Thanks.