Update 36-01907-count-salary-categories.sql

Author: leetlab11

36-01907-count-salary-categories.sql

@@ -1 +1,18 @@
+-- since all rows are supposed to have different texts, use UNION
+-- count rows for each income group
 
+select 'Low Salary' as category, sum(case when income < 20000 then 1 else 0 end) as accounts_count
+from Accounts
+
+union
+
+select 'Average Salary' as category, sum(case when income between 20000 and 50000 then 1 else 0 end) as accounts_count
+from Accounts
+
+union
+
+select 'High Salary' as category, sum(case when income > 50000 then 1 else 0 end) as accounts_count
+from Accounts
+
+
+-- no companies listed