What's the difference between "SELECT location as id, subsidiary FROM LocationSubsidiaryMap" and "SELECT id, subsidiary FROM location WHERE subsidiary IS NOT NULL"

AI generated answer (using internal Slack threads):

The difference between the two SQL queries: 1.

SELECT location as id, subsidiary FROM LocationSubsidiaryMap

2.

SELECT id, subsidiary FROM location WHERE subsidiary IS NOT NULL

is as follows: The first query is selecting from the

LocationSubsidiaryMap

table. It is renaming the

location

column to

id

and also selecting the

subsidiary

column. This query will return all rows from the

LocationSubsidiaryMap

table, including those where

subsidiary

may be NULL. The second query is selecting from the

location

table. It is selecting the

id

and

subsidiary

columns, but only for rows where

subsidiary

is not NULL. This means it will exclude any rows where

subsidiary

is NULL. In summary, the main differences are the tables they are selecting from (

LocationSubsidiaryMap

vs

location

), the renaming of the

location

column to

id

in the first query, and the exclusion of rows where

subsidiary

is NULL in the second query. ****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ******