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指定我真的很好奇我怎麼會刪除記錄與此查詢包括如何最終刪除,並非查詢
CREATE temporary TABLE IF NOT EXISTS temp AS
(SELECT colleges.college_name,
courses.course_name
FROM colleges
INNER JOIN courses
ON colleges.id = courses.college_id
WHERE colleges.college_name = 'College of Engineering'
AND courses.course_name = 'test'
GROUP BY colleges.college_name,
courses.course_name);
DELETE FROM temp
WHERE college_name = 'College of Engineering'
AND course_name = 'test';
DROP TABLE temp;
表院校有值「工程學院」和「學院的所有記錄溝通',而桌子課程有兩個值'測試'。查詢的結果是兩個測試值在工程學院被刪除而不是測試。
您注意到缺少'''? – Sirko 2014-09-20 10:57:23
對不起,我沒有注意到它。編輯 – javacantcsharp 2014-09-20 11:06:54