Exception of type 'System.OutOfMemoryException' was thrown. Why?

Question

I have a dynamic query that returns around 590,000 records. It runs successfully the first time, but if I run it again, I keep getting a System.OutOfMemoryException

Answer 1

try to break your large data as much as possible because I already faced number of times this types of problem. In which I have above 10 Lakh records with 15 columns.