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06.AG02-TheSumFunction.sql
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06.AG02-TheSumFunction.sql
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/*
Revising Aggregations - The Sum Function
Query the total population of all cities in CITY where District is California.
Input Format
The CITY table is described as follows:
+-------------+--------------+
| Field | Type |
+-------------+--------------+
| ID | number |
| Name | varchar2(17) |
| CountryCode | varchar2(3) |
| District | varchar2(20) |
| Population | number |
+-------------+--------------+
*/
use hackerrank;
GO
raiserror('Now at aggregation.proc_02thesumfunction creation ....',0,1)
GO
CREATE or ALTER PROCEDURE aggregation.proc_02thesumfunction (@OutParams int OUT)
AS
SELECT @OutParams = sum(population) from aggregation.CITY where district='California';
GO
raiserror('Now at AggregationTestClass.test_02thesumfunction creation ....',0,1)
GO
CREATE or ALTER PROCEDURE AggregationTestClass.test_02thesumfunction
AS
BEGIN
DECLARE @expected int;
DECLARE @actual int;
exec aggregation.proc_02thesumfunction @actual OUT
SET @expected = 339002;
EXEC tSQLt.assertEquals @expected, @actual;
END;
GO
--exec tSQLt.Run 'AggregationTestClass.[test_02thesumfunction]';