按組計數Mysql count

嗨，我在mysql數據庫上有以下表格。按組計數Mysql count

╔═══════════╦═════════╦════════╦════════════════╗ 
║ REVIEW_ID ║ USER_ID ║ STATUS ║ DATE_ADDED ║ 
╠═══════════╬═════════╬════════╬════════════════╣ 
║  218 ║  2 ║ cool ║ 20130121134811 ║ 
║  218 ║  2 ║ cool ║ 20130121134812 ║ 
║  218 ║  2 ║ lame ║ 20130121134813 ║ 
║  218 ║  2 ║ funny ║ 20130121134814 ║ 
║  218 ║  2 ║ funny ║ 20130121134815 ║ 
║  218 ║  2 ║ funny ║ 20130121134816 ║ 
║  218 ║  2 ║ lame ║ 20130121134817 ║ 
╚═══════════╩═════════╩════════╩════════════════╝

我怎樣才能得到一個結果在那裏時，我基於user_id做詢問我需要得到的每種類型的總狀態結果：

╔════════╦════════════╗ 
║ STATUS ║ TOTALCOUNT ║ 
╠════════╬════════════╣ 
║ cool ║   2 ║ 
║ funny ║   3 ║ 
║ lame ║   2 ║ 
╚════════╩════════════╝

感謝

來源

2013-01-23 Saraswathi Apavoo

如果谷歌「MySQL會以組數」第一喜噸給你一個非常簡單的解決方案：http://www.w3resource.com/mysql/aggregate-functions-and-grouping/aggregate-functions-and-grouping-count-with-group-by.php – Dan

使用COUNT()這是一個聚合函數，並根據它們將它們分組status

SELECT status, COUNT(*) totalCount 
FROM tableName 
GROUP BY status

SQLFiddle Demo

其他（S）

MySQL GROUP BY with some Aggregate Functions List

來源

2013-01-23 09:32:59

@丹，謝謝爲編輯。 –

SELECT status, count(*) 
FROM your_table 
GROUP BY status

來源

2013-01-23 09:33:30 fthiella

+1 @fthiella否則沒有人會投票我們的正確答案;） – bonCodigo

SELECT status, count(*) 
FROM yourtable 
GROUP BY status 
;

來源

2013-01-23 09:35:51 bonCodigo

謝謝你，以及:) – fthiella

SELECT STATUS, COUNT(*) AS TOTALCOUNT 
FROM tableName 
GROUP BY STATUS 
HAVING USER_ID = user_id you need

來源

2013-01-23 10:44:29 Tsingyi

按組計數Mysql count

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