html_url,issue_url,id,node_id,user,created_at,updated_at,author_association,body,reactions,issue,performed_via_github_app
https://github.com/simonw/sqlite-utils/issues/172#issuecomment-698178101,https://api.github.com/repos/simonw/sqlite-utils/issues/172,698178101,MDEyOklzc3VlQ29tbWVudDY5ODE3ODEwMQ==,9599,2020-09-24T07:48:57Z,2020-09-24T07:49:20Z,OWNER,"> I wonder if I could make this faster by separating it out into a few steps:
> 
>     * Create the new lookup table with all of the distinct rows
> 
>     * Add the blank foreign key column
> 
>     * run a `UPDATE table SET blah_id = (select id from lookup where thang = table.thang)`
> 
>     * Drop the value columns
My prototype of this knocked the time down from 10 minutes to 4 seconds, so I think the change is worth it!
```
% date
sqlite-utils extract salaries.db salaries \
   'Department Code' 'Department' \
  --table 'departments' \
  --fk-column 'department_id' \
  --rename 'Department Code' code \
  --rename 'Department' name
date
sqlite-utils extract salaries.db salaries \
   'Union Code' 'Union' \
  --table 'unions' \
  --fk-column 'union_id' \
  --rename 'Union Code' code \
  --rename 'Union' name
date
sqlite-utils extract salaries.db salaries \
   'Job Family Code' 'Job Family' \
  --table 'job_families' \
  --fk-column 'job_family_id' \
  --rename 'Job Family Code' code \
  --rename 'Job Family' name
date
sqlite-utils extract salaries.db salaries \
   'Job Code' 'Job' \
  --table 'jobs' \
  --fk-column 'job_id' \
  --rename 'Job Code' code \
  --rename 'Job' name
date
Thu Sep 24 00:48:16 PDT 2020

Thu Sep 24 00:48:20 PDT 2020

Thu Sep 24 00:48:24 PDT 2020

Thu Sep 24 00:48:28 PDT 2020

Thu Sep 24 00:48:32 PDT 2020
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