我有一個MySQL數據庫並在phpmyadmin中運行sql。根據2個電子郵件地址查找列的重複條目
我正在嘗試爲列venID查找重複條目。重複venID只有2個電子郵件地址 - [email protected]和[email protected]。
這是我迄今爲止，但我需要添加我想比較的電子郵件地址。不知道該怎麼做。不知道我有甚麼好的開始。有人可以幫忙嗎？
SELECT venID, email, count(*) as dupCount
FROM thetable, thetable2
WHERE venID and email
GROUP BY venID, email HAVING count(*) > 1
試試這個：
SELECT venID, email, count(*) as dupCount
FROM thetable, thetable2
WHERE email in ('[email protected]','[email protected]')
GROUP BY venID, email
HAVING count(*) > 1
如果你也只需要選擇特定的venID，您可以使用此：
SELECT venID, email, count(*) as dupCount
FROM thetable, thetable2
WHERE email in ('[email protected]','[email protected]')
AND venID = 2
GROUP BY venID, email
HAVING count(*) > 1
見https://meta.stackoverflow.com/問題/ 333952 /爲什麼，應該-I-提供-AN-MCVE換什麼，似乎對我將要-A-極簡單的SQL查詢 – Strawberry