[英]Group by year and month but only present the month and year actual mysql
我有下表。
select * from `consumo`;
輸出:
+----+------------+-----------------+---------------------+
| id | cedula | registroConsumo | fecha-hora |
+----+------------+-----------------+---------------------+
| 1 | 0931111111 | 20 | 2016-08-17 13:52:48 |
| 2 | 0931111111 | 25 | 2016-08-17 13:53:01 |
| 3 | 0311111111 | 27 | 2016-08-17 13:54:23 |
| 4 | 0311111111 | 10 | 2016-08-17 13:54:26 |
| 5 | 0311111111 | 12 | 2016-08-17 13:54:29 |
| 6 | 0311111111 | 14 | 2016-08-17 13:54:34 |
| 7 | 0311111111 | 19 | 2016-08-17 13:54:38 |
| 8 | 0311111111 | 190 | 2016-08-17 13:54:44 |
| 9 | 0311111111 | 195 | 2016-08-17 13:54:48 |
| 10 | 0912223333 | 19 | 2016-08-17 13:54:54 |
| 11 | 0111111111 | 20 | 2016-08-17 13:54:59 |
| 12 | 0111111111 | 23 | 2016-08-17 13:55:03 |
| 13 | 0111111111 | 27 | 2016-08-17 13:55:07 |
| 14 | 0111111111 | 35 | 2016-08-17 13:55:11 |
| 15 | 0111111111 | 10 | 2016-08-17 13:55:14 |
| 16 | 0111111111 | 35 | 2016-09-04 12:10:01 |
| 17 | 0111111111 | 330 | 2016-09-04 12:10:06 |
+----+------------+-----------------+---------------------+
我想按年份和月份分組,但實際上只顯示月份和年份的結果都在Mysql中。
我這樣做:
select SUM(`registroConsumo`) from `consumo`
GROUP BY YEAR(`fecha-hora`),MONTH(`fecha-hora`)
HAVING YEAR(`fecha-hora`) = SELECT EXTRACT (YEAR FROM (SELECT NOW()))
AND MONTH(`fecha-hora`) = SELECT EXTRACT (MONTH FROM (SELECT NOW())) ;
我收到此錯誤:
錯誤1064(42000):您的SQL語法有錯誤; 檢查與您的MySQL服務器版本對應的手冊以獲取正確的語法,以在第1行的
SELECT EXTRACT (YEAR FROM (SELECT NOW())) AND MONTH(`fecha-hora`) = SELECT EXTRA
附近使用
在having
子句中出現的子查詢中,您有幾個缺少的括號。
但是您可以更務實地處理此問題,並使用order by
和limit
返回您獲得的最新數據:
select YEAR(`fecha-hora`),
MONTH(`fecha-hora`)
SUM(`registroConsumo`)
from `consumo`
group by YEAR(`fecha-hora`),
MONTH(`fecha-hora`)
order by YEAR(`fecha-hora`) DESC,
MONTH(`fecha-hora`) DESC
limit 1
或者,如果確實需要與當前年份和月份匹配:
select YEAR(`fecha-hora`),
MONTH(`fecha-hora`)
SUM(`registroConsumo`)
from `consumo`
where YEAR(`fecha-hora`) = YEAR(NOW())
and MONTH(`fecha-hora`) = MONTH(NOW())
group by YEAR(`fecha-hora`),
MONTH(`fecha-hora`)
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