如何更新标准 SQL 中查询创建的表？

Question

I have created a table in Standard SQL. In this table, I have a column named COUNTRY. In the results, I saw that I have Brazil and Brasil, and also United Kingdom and Great Britan, so I want to update one of them to match the other, because it is the same for the analysis I want to do. Any ideas?

Answer 1

You can update a table:

update t
    set country = (case when country = 'Brasil' then 'Brazil'
                        when country = 'Great Britain' then 'United Kingdom'
                        else country
                   end)
    where country in ('Brasil', 'Great Britain');

However, it might be simpler to modify your query so the next time you create the table the countries will be correct.

Answer 2

If i understand correctly what you want, you can use:

UPDATE yourTable
SET COUNTRY = 'Great Britan'
WHERE COUNTRY = 'United Kingdom'

This changes every 'United Kingdom' column to 'Great Britan'

Answer 3

Below is for BigQuery Standard SQL

update your_table t
set country = d.country 
from (
  select 'Brazil' country, 'Brasil' matches union all
  select 'United Kingdom', 'UK|Great Britain|GB' union all
  select 'USA', 'US'
) d 
where t.country in unnest(split(matches, '|'));