Im using a tool to write SOQL queries - very simple like
select * from contact

Is there a simple SOQL query I could use to get email domain in that query like
select email,[split email as domain] from contact

What is meant by scope of database.batchable interface? Please explain it?

What number of records can be displayed on VisualForce page? How to maximize it?

Hi All,
I created 1 scheduled job, which will run every 5 minutes like below.


It can run normally, but I wonder why at the time 8h45, 8h50, 8h55, 9h00, 9h5, and 9h10, it cannot run the apex job. Then from 9h6 to 9h11, it runs 6 times. It is all apex jobs that should be run from 8h45 to 9h10.

I have 2 questions:
1. Why the apex job doesn't run on time?
2. Can I handle it when the apex job doesn't run on time? e.g: send an email to the administrator
Thank you,

Im using a tool to write SOQL queries - very simple like
select * from contact

Is there a simple SOQL query I could use to get email domain in that query like
select email,[split email as domain] from contact

could anyone give me sample scenarios when we go for lookup,master and junction