A Template for writing Scheduled Batch job in apex

ScheduledBatchClassTemplate

/**
 * @File Name          : CreateMissingContactUserLinkController.cls
 * @Description        : 
 * @Author             : 
 * @Group              :
 * @Last Modified By   : 
 * @Last Modified On   : 2020-01-29 15:32:43
 * @Modification Log   :
 * Ver       Date            Author                  Modification
 * 1.0       2020-01-29      Srujan                   Initial Version
 **/
public class CreateMissingContactUserLinkController implements Database.Batchable<sObject>, Database.Stateful, Schedulable{
	public void execute(SchedulableContext sc) {
		CreateMissingContactUserLinkController linkCU = new CreateMissingContactUserLinkController();
		Database.executeBatch(linkCU, 200); 
	}



	/**
	 * @description
	 * @author 
	 * @param Database.BatchableContext BC
	 * @return database.querylocator
	 **/
	public database.querylocator start(Database.BatchableContext BC) {
		//Query all target records 
		String query = 'SELECT id, studentportalUser__c, Pidm__c  FROM Contact WHERE recordtype.name = \'studentrecord\' AND studentportaluser__c = null AND status__c IN (\'TB\', \'AS\') limit 500';
		return Database.getQueryLocator(query);
	}

	/**
	 * @description
	 * @author 
	 * @param Database.BatchableContext BC
	 * @param List<Contact> contacts
	 * @return void
	 **/
	public void execute(Database.BatchableContext BC, List<sObject> scope) {
		// Iterate in Scope and perform main logic 

	}

	/**
	 * @description finish method of Standard Batch class
	 * @author 
	 * @param Database.BatchableContext BC
	 * @return void
	 **/
	public void finish(Database.BatchableContext BC) {
		/*AsyncApexJob apexJob = [Select Id, Status, NumberOfErrors, JobItemsProcessed, 
							    TotalJobItems, ExtendedStatus
							    from AsyncApexJob where Id = :BC.getJobId()];


		if(apexJob.NumberOfErrors > 0) {
			string subject = 'Import integration entires To Opportunity Batch ' + apexJob.Status + ' with ' + apexJob.NumberOfErrors + ' failures.';
			string body = 'The batch Apex job processed ' + apexJob.TotalJobItems +
							      ' batches with ' + apexJob.NumberOfErrors + ' failures. Status details: ' + apexJob.ExtendedStatus;

			
		}*/

	}


	/**
	* @description 
	* @author 
	* @return void 
	**/
	public static void scheduleIt(){
        /*ReadArtezTransactions m = new ReadArtezTransactions(); 
        String sch = '0 0 0/1 1/1 * ? *';
        String jobName = (Test.isRunningTest() ? 'Read Artez Integration Entry Test' : 'Read Artez Integration Entry');
        String jobID = system.schedule(jobName , sch, m);*/
    }
}