MySQL選擇具有兩個條件的行，並且具有相同列ID的計數大於1

Question

在此示例中，結果應為session_id 165337：

這是到目前為止我無法使用的MySQL：

$value1 = $this->_getDb()->fetchCol("
SELECT conversation_id              
FROM xf_conversation_recipient
WHERE user_id = '4465'
AND user_id = '1'
HAVING COUNT(DISTINCT conversation_id) > 1
");

這是有效的答案和代碼：

$value1 = $this->_getDb()->fetchCol("
SELECT conversation_id, COUNT(*) c 
FROM xf_conversation_recipient
WHERE user_id IN ('4465','1') 
GROUP BY conversation_id HAVING c > 1
");

Answer 1

然后嘗試以下方法：

SELECT conversation_id, COUNT(*) c 
FROM xf_conversation_recipient  
GROUP BY conversation_id HAVING c > 1;

和你的情況：

$value1 = $this->_getDb()->fetchCol("
SELECT conversation_id, COUNT(*) c 
FROM xf_conversation_recipient
WHERE user_id IN ('4465','1') 
GROUP BY conversation_id HAVING c > 1
");

Answer 2

WHERE user_id = '4465' AND user_id = '1' 

正確

WHERE user_id  = '4465' OR user_id = '1' 

Answer 3

$value1 = $this->_getDb()->fetchCol("
SELECT conversation_id FROM xf_conversation_recipient WHERE user_id IN ('4465','1') HAVING COUNT(*) > 1
");