Create reformat-department-table.sql

Author: kamyu104

MySQL/reformat-department-table.sql

@@ -0,0 +1,18 @@
+# Time:  O(n)
+# Space: O(n)
+
+SELECT id, 
+       SUM(IF(month = 'Jan', revenue, NULL)) AS Jan_Revenue, 
+       SUM(IF(month = 'Feb', revenue, NULL)) AS Feb_Revenue, 
+       SUM(IF(month = 'Mar', revenue, NULL)) AS Mar_Revenue, 
+       SUM(IF(month = 'Apr', revenue, NULL)) AS Apr_Revenue, 
+       SUM(IF(month = 'May', revenue, NULL)) AS May_Revenue, 
+       SUM(IF(month = 'Jun', revenue, NULL)) AS Jun_Revenue, 
+       SUM(IF(month = 'Jul', revenue, NULL)) AS Jul_Revenue, 
+       SUM(IF(month = 'Aug', revenue, NULL)) AS Aug_Revenue, 
+       SUM(IF(month = 'Sep', revenue, NULL)) AS Sep_Revenue, 
+       SUM(IF(month = 'Oct', revenue, NULL)) AS Oct_Revenue, 
+       SUM(IF(month = 'Nov', revenue, NULL)) AS Nov_Revenue, 
+       SUM(IF(month = 'Dec', revenue, NULL)) AS Dec_Revenue 
+FROM   department 
+GROUP  BY id;