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Update questions.sql #66

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7 changes: 3 additions & 4 deletions SQL Deep Dive/Distinct/questions.sql
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Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,7 @@
* Question: What unique titles do we have?
*/

SELECT * FROM titles;
SELECT DISTINCT TITLE FROM public.titles;


/*
Expand All @@ -13,14 +13,13 @@ SELECT * FROM titles;
* Question: How many unique birth dates are there?
*/

SELECT * FROM employees;
SELECT COUNT(DISTINCT birth_date) FROM employees;

/*
* DB: World
* Table: country
* Question: Can I get a list of distinct life expectancy ages
* Make sure there are no nulls
*/

SELECT * FROM country;
SELECT distinct lifeexpectancy FROM country WHERE lifeexpectancy IS NOT NULL;