T-SQL query results based on count [closed] - sql-server

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Given the table above how could I achieve a result where I would only see rows where A has a category, so for example I would see all the rows for CARS AND BIKES but not SCOOTERS because A does not have SCOOTER category.
The 2nd result I would to achieve is just so see rows where there are > 3 distinct OrgNames for a Category. So for example I would only return rows for BIKES and SCOOTERS because there are more than 3 OrgNames per Category.
Thank you in advance

Answer 1

I think I understand the types of queries you're wanting to create.
Take a look at the code below:
DECLARE #ExampleData TABLE (
OrgName nvarchar(1),
Category nvarchar(10)
)
INSERT INTO #ExampleData (OrgName, Category)
SELECT DISTINCT
OrgName,
Category
FROM (SELECT
'A' AS OrgName,
'CARS' AS Category
UNION ALL
SELECT
'B' AS OrgName,
'CARS' AS Category
UNION ALL
SELECT
'C' AS OrgName,
'CARS' AS Category
UNION ALL
SELECT
'A' AS OrgName,
'BIKES' AS Category
UNION ALL
SELECT
'D' AS OrgName,
'BIKES' AS Category
UNION ALL
SELECT
'E' AS OrgName,
'BIKES' AS Category
UNION ALL
SELECT
'F' AS OrgName,
'BIKES' AS Category
UNION ALL
SELECT
'Z' AS OrgName,
'SCOOTERS' AS Category
UNION ALL
SELECT
'G' AS OrgName,
'SCOOTERS' AS Category
UNION ALL
SELECT
'H' AS OrgName,
'SCOOTERS' AS Category
UNION ALL
SELECT
'I' AS OrgName,
'SCOOTERS' AS Category
UNION ALL
SELECT
'J' AS OrgName,
'SCOOTERS' AS Category) data
/*
View full recordset
*/
SELECT
e.*
FROM #ExampleData e
ORDER BY e.Category ASC, e.OrgName ASC
/*
Option 1: Only rows where at least 1 category has an OrgName = 'A'
*/
SELECT
e.*
FROM #ExampleData e
INNER JOIN (SELECT DISTINCT
e.Category
FROM #ExampleData e
WHERE e.OrgName = 'A') cat
ON cat.Category = e.Category
ORDER BY e.Category ASC, e.OrgName ASC
/*
Option 2: Only see rows where therere are >3 Org Names per category
*/
SELECT
e.*
FROM #ExampleData e
INNER JOIN (SELECT DISTINCT
e.Category,
COUNT(DISTINCT e.OrgName) AS Count
FROM #ExampleData e
GROUP BY e.Category) cat
ON cat.Category = e.Category
AND cat.Count > 3
ORDER BY e.Category ASC, e.OrgName ASC
It gives the output below:
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