insert rows in million in batch

hi

i want do something liek this

declare @max int

select @max = count(*) from table1 a join table2 b on a.id = b.id and a.date>getdate()

while(@max)

insert into table c

column1,

column2

select * from 

 table1 a join table2 b on a.id = b.id and a.date>getdate()

i dotn know exacxt logic, buy i have so m any rows and i need to do it on batch and faster