How to load data from query into table on BigQuery - google-bigquery

Question

I have The following BigQuery tables:
orders:
[
{
"name": "orders_id",
"type": "INTEGER",
"mode": "NULLABLE"
},
{
"name": "customer_id",
"type": "INTEGER",
"mode": "NULLABLE"
}
]
customers:
[
{
"name": "customer_id",
"type": "INTEGER",
"mode": "NULLABLE"
},
{
"name": "customer_name",
"type": "INTEGER",
"mode": "NULLABLE"
}
]
I want to create new_orders as follows:
[
{
"name": "orders_id",
"type": "INTEGER",
"mode": "NULLABLE"
},
{
"name": "customer_name",
"type": "INTEGER",
"mode": "NULLABLE"
}
]
So I created an empty table for new_orders and wrote this query:
SELECT o.orders_id,c.customer_name
from `project.orderswh.orders` as o
inner join `project.orderswh.customers` as c on o.customer_id = c.customer_id
My problem is how to load the data from this query result into the new table.
I have like 15M rows. To the best of my knowledge regular insert is cost-expensive and incredibly slow. How can I do this as a load job?

Answer 1

you could do this from BigQuery Console
There follow these steps:
1) Show Options
2) Destination Table
3) choose dataset and provide "new_orders" as Table ID
4) then set "Write Preference" to "Write if empty" as this is one time thing as you said
If needed, look also for this tutorial: https://cloud.google.com/bigquery/docs/writing-results

Answer 2

You could use the bq command line tool:
bq query --append_table \
--nouse_legacy_sql \
--allow_large_results \
--destination_table project.orderswh.new_orders 'SELECT o.orders_id,c.customer_name
from `project.orderswh.orders` as o
inner join `project.orderswh.customers` as c on o.customer_id = c.customer_id'