To write an effective apex code,triggers,classes, batches and unit tests ,do  I need to learn any language apart from OOPs...! Like C#,Java,PHP,etc? What I should know to master in writing apex coding, and in Web services,Integrations in salesrooms ?Should I know any programming language before learning it or making an effective CRM application?

Any suggestions will be of great help! Thank you! 

Hi all,

I am newbie to apex Batch classes. I need to understand how Apex batches execute(the process).

I know how to write apex classes and trigeers. but totally confused in following Apex batch code. Kindly give me some tips/knowledge/information on how easily I can write apex batches.

==========================================================

1. global class Beautification's implements Database.Batchable<sObject>{
2. global final String Query;
3. global final String Entity;
4. global final String Field;
5. global final String Value;
6. global UpdateAccountFields(String q, String e, String f, String v){
7. Query=q; Entity=e; Field=f;Value=v;
8. }
9. global Database.QueryLocator start(Database.BatchableContext BC){
10. return Database.getQueryLocator(query);
11. }
12. global void execute(Database.BatchableContext BC,
13. List<sObject> scope){
14. for(Sobject s : scope){s.put(Field,Value);
15. } update scope;
16. }
17. global void finish(Database.BatchableContext BC){
18. }
19. }

The following code can be used to call the above class:

1. Id batchInstanceId = Database.executeBatch(new UpdateInvoiceFields(q,e,f,v), 5);

=============================================================

I am little confused of the following lines:

1. ""query","entity","field","value"" declared as variable and at 7th line why it is assigned to q,e,f,v.

2.  return Database.getQueryLocator(query)...?

3.  [List<sObject> scope)  {  for(Sobject s : scope){s.put(Field,Value);]..in line 13,14.

Can't we use directly Account,lead,contact or any custom object. Like this:[ List<account>scope { for(account a:scope...].

4. Id batchInstanceId = Database.executeBatch(new UpdateInvoiceFields(q,e,f,v), 5);

can please explain line by line.

thank you in advance.

any kind of explanation/suggestions/information is highly appriciated.

 want to update another object say  1."account_master__c" from  2nd"ATM_transacction__c".writing after insert trigger in 2nd object.please look at the code.

trigger atm2 on ATM_Transaction__c (after insert)

{

for(atm_transaction__c atm: trigger.new)
{
aggregateResult a=[select sum(amount__c) s from atm_transaction__c where
account_id__c=:atm.account_id__c];

double i=(double)a.get('s');

account_master__c am=new account_master__c();
am=[select id, balance__c from account_master__c where
account_idm__c=:atm.accout_id__c]

if(am.balance__c > i){
am.balance__c=am.balance__c -i;
}
//update am;
}
update am;

}

where i wenr wrong.

thanks in advance.

To write an effective apex code,triggers,classes, batches and unit tests ,do  I need to learn any language apart from OOPs...! Like C#,Java,PHP,etc? What I should know to master in writing apex coding, and in Web services,Integrations in salesrooms ?Should I know any programming language before learning it or making an effective CRM application?

Any suggestions will be of great help! Thank you! 

Hi all,

I am newbie to apex Batch classes. I need to understand how Apex batches execute(the process).

I know how to write apex classes and trigeers. but totally confused in following Apex batch code. Kindly give me some tips/knowledge/information on how easily I can write apex batches.

==========================================================

1. global class Beautification's implements Database.Batchable<sObject>{
2. global final String Query;
3. global final String Entity;
4. global final String Field;
5. global final String Value;
6. global UpdateAccountFields(String q, String e, String f, String v){
7. Query=q; Entity=e; Field=f;Value=v;
8. }
9. global Database.QueryLocator start(Database.BatchableContext BC){
10. return Database.getQueryLocator(query);
11. }
12. global void execute(Database.BatchableContext BC,
13. List<sObject> scope){
14. for(Sobject s : scope){s.put(Field,Value);
15. } update scope;
16. }
17. global void finish(Database.BatchableContext BC){
18. }
19. }

The following code can be used to call the above class:

1. Id batchInstanceId = Database.executeBatch(new UpdateInvoiceFields(q,e,f,v), 5);

=============================================================

I am little confused of the following lines:

1. ""query","entity","field","value"" declared as variable and at 7th line why it is assigned to q,e,f,v.

2.  return Database.getQueryLocator(query)...?

3.  [List<sObject> scope)  {  for(Sobject s : scope){s.put(Field,Value);]..in line 13,14.

Can't we use directly Account,lead,contact or any custom object. Like this:[ List<account>scope { for(account a:scope...].

4. Id batchInstanceId = Database.executeBatch(new UpdateInvoiceFields(q,e,f,v), 5);

can please explain line by line.

thank you in advance.

any kind of explanation/suggestions/information is highly appriciated.

 want to update another object say  1."account_master__c" from  2nd"ATM_transacction__c".writing after insert trigger in 2nd object.please look at the code.

trigger atm2 on ATM_Transaction__c (after insert)

{

for(atm_transaction__c atm: trigger.new)
{
aggregateResult a=[select sum(amount__c) s from atm_transaction__c where
account_id__c=:atm.account_id__c];

double i=(double)a.get('s');

account_master__c am=new account_master__c();
am=[select id, balance__c from account_master__c where
account_idm__c=:atm.accout_id__c]

if(am.balance__c > i){
am.balance__c=am.balance__c -i;
}
//update am;
}
update am;

}

where i wenr wrong.

thanks in advance.