March 2021
Beginner to intermediate
456 pages
12h 49m
Korean
Content preview from 러닝 SQL: 데이터 생성, 검색, 조작까지 데이터 제대로 주무르기
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368
러닝 SQL
+--------------------+-------------+-------------+
| date(payment_date) | sum(amount) | 7_day_avg |
+--------------------+-------------+-------------+
| 2005-07-05 | 128.73 | 1603.740000 |
| 2005-07-06 | 2131.96 | 1698.166000 |
| 2005-07-07 | 1943.39 | 1738.338333 |
| 2005-07-08 | 2210.88 | 1766.917143 |
| 2005-07-09 | 2075.87 | 2049.390000 |
| 2005-07-10 | 1939.20 | 2035.628333 |
| 2005-07-11 | 1938.39 | 2054.076000 |
| 2005-07-12 | 2106.04 | 2014.875000 |
| 2005-07-26 | 160.67 | 2046.642500 |
| 2005-07-27 | 2726.51 | 2206.244000 |
| 2005-07-28 | 2577.80 | 2316.571667 |
| 2005-07-29 | 2721.59 | 2388.102857 |
| 2005-07-30 | 2844.65 | 2754.660000 | ...