cheeks/practical-sql-2
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Add note to Try It Yourself Chapter 6 answer

Browse Source
This commit is contained in:
anthonydb 2023-10-19 20:43:50 -04:00
parent c7b1022a24
commit 8c38c1c833
1 changed files with 9 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
Try_It_Yourself/Try_It_Yourself.sql
View File

@ -253,7 +253,7 @@ SELECT 3.14 * (5 ^ 2);
SELECT county_name, SELECT county_name,
state_name, state_name,
births_2019 AS births, births_2019 AS births,
deaths_2019 AS DEATHS, deaths_2019 AS deaths,
births_2019::numeric / deaths_2019 AS birth_death_ratio births_2019::numeric / deaths_2019 AS birth_death_ratio
FROM us_counties_pop_est_2019 FROM us_counties_pop_est_2019
WHERE state_name = 'New York' WHERE state_name = 'New York'
@ -263,6 +263,14 @@ ORDER BY birth_death_ratio DESC;
-- to deaths in the 2019 estimates. One exception to the trend is Jefferson County, -- to deaths in the 2019 estimates. One exception to the trend is Jefferson County,
-- which is upstate on the U.S./Canadian border. -- which is upstate on the U.S./Canadian border.
-- Note: There were six counties in the U.S. with zero deaths in 2019, according
-- to this data set -- in Hawaii, Nebraska, North Dakota, and Texas. If you modify
-- the query to filter on one of those states, you'll need to adjust the WHERE
-- clause to eliminate those zero-death counties because division by zero isn't
-- allowed. To do that, modify your WHERE clause like this:
WHERE state_name = 'Texas' AND deaths_2019 > 0
-- 3. Was the 2019 median county population estimate higher in California or New York? -- 3. Was the 2019 median county population estimate higher in California or New York?