고다혜: [SQL] Odd And Even Transactions_241217

Author: KodaHye

SQL/15주차/Odd and Even Transactions.sql

@@ -0,0 +1,28 @@
+WITH EVEN AS (
+    SELECT TRANSACTION_DATE, SUM(AMOUNT) `amount`
+    FROM TRANSACTIONS
+    WHERE MOD(AMOUNT, 2) = 0
+    GROUP BY TRANSACTION_DATE
+), ODD AS (
+    SELECT TRANSACTION_DATE, SUM(AMOUNT) `amount`
+    FROM TRANSACTIONS
+    WHERE MOD(AMOUNT, 2) = 1
+    GROUP BY TRANSACTION_DATE
+)
+
+SELECT DISTINCT(a.TRANSACTION_DATE) `transaction_date`
+              , IFNULL(c.AMOUNT, 0) `odd_sum`
+              , IFNULL(b.AMOUNT, 0) `even_sum`
+FROM TRANSACTIONS a
+         LEFT JOIN EVEN b ON a.transaction_date = b.transaction_date
+         LEFT JOIN ODD c ON a.transaction_date = c.transaction_date
+ORDER BY transaction_date
+
+------------------------------------------
+
+SELECT transaction_date
+     , SUM(CASE WHEN MOD(AMOUNT, 2) = 1 THEN AMOUNT ELSE 0 END) `odd_sum`
+     , SUM(CASE WHEN MOD(AMOUNT, 2) = 0 THEN AMOUNT ELSE 0 END) `even_sum`
+FROM TRANSACTIONS
+GROUP BY TRANSACTION_DATE
+ORDER BY TRANSACTION_DATE