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Developer-C 11.1
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WITH Categories (c_id,name) AS ( SELECT 1,'Thrill' UNION ALL SELECT 2,'Leisure' UNION ALL SELECT 3,'Kiddie' ) ,Rides (r_id,c_id) AS ( SELECT 1,1 UNION ALL SELECT 2,1 UNION ALL SELECT 3,2 UNION ALL SELECT 4,2 UNION ALL SELECT 5,3 UNION ALL SELECT 6,3 ), guest_history (h_id,g_id) AS ( SELECT 1,1 UNION ALL SELECT 2,1 UNION ALL SELECT 3,2 UNION ALL SELECT 4,3 ), history_items (h_id,r_id) AS ( SELECT 1,5 UNION ALL SELECT 2,6 UNION ALL SELECT 3,1 UNION ALL SELECT 3,2 UNION ALL SELECT 4,5 ) SELECT A.g_id,COUNT(C.r_id) FROM guest_history A INNER JOIN history_items B ON A.h_id = B.h_id INNER JOIN Rides C ON B.r_id = C.r_id AND C.c_id = 3 GROUP BY A.g_id
g_id
(No column name)
1
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1