Question

Have a table with 3 million rows and would like to partition it. There are 5 columns, one of them which is a date column. I would like to split up the table by dates. Any easy help would be great. Thanks

Answer 1

If I’m understanding your question correctly, there are a couple of ways to do this:

You could do it using the Between keyword to break down by specific date ranges.

drop table if exists TableA, TableB;

create table TableA
select * from YourTable
where DateColumn between '2011-07-01' and '2012-02-01';

create table TableB
select * from YourTable
where DateColumn between '2011-01-01' and '2011-06-30';

Or if your breakdown is more simple (e.g. you want to break down by year), you can use the date functions.

drop table if exists TableA, TableB;

create table TableA
select * from YourTable
where year(DateColumn) = '2011';

create table TableB
select * from YourTable
where year(DateColumn) = '2012';

There are probably more dynamic ways to do this as well, but I would need to hear some more details of your environment and goals.