Use a bulk insert - Amazon Redshift
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Use a bulk insert

Use a bulk insert operation with a SELECT clause for high-performance data insertion.

Use the INSERT and CREATE TABLE AS commands when you need to move data or a subset of data from one table into another.

For example, the following INSERT statement selects all of the rows from the CATEGORY table and inserts them into the CATEGORY_STAGE table.

insert into category_stage
(select * from category);

The following example creates CATEGORY_STAGE as a copy of CATEGORY and inserts all of the rows in CATEGORY into CATEGORY_STAGE. 

create table category_stage as
select * from category;