我有一张用于调查的表格，并且想要删除与某个特定监视相关的所有记录。
我的桌子：
_______________ _______________ ___________ ________________
|_tblSurvey___| |_tblAnswers___| |_tblAlt__| |_tblQuestions_|
| surveyID | | answerAltID | | altID | | questID |
| surveyName | | userID | | altText | | questText |
|_____________| |______________| |_questID_| |_surveyID_____|
假设我要删除与SurveyID 1相关的所有记录。
我试过了：
DELETE
*
FROM tblSurvey, tblQuestions, tblAlt, tblAnswers
WHERE tblSurvey.surveyID = 1
AND tblsurvey.surveyID = tblQuestions.surveyID
AND tblQuestions.questID = tblAlt.questID
AND tblAlt.altID = tblAnswers.answerAltID
最佳答案
两种方式：
使用ON DELETE CASCADE设置外键约束。
使用多表DELETE语句。
尝试这个：
DELETE tblSurvey, tblQuestion, tblAlt, tblAnswers
FROM tblSurvey
JOIN tblQuestion ON tblsurvey.surveyID = tblQuestion.surveyID
JOIN tblAlt ON tblQuestions.questID = tblAlt.questID
JOIN tblAnswers ON tblAlt.altID = tblAnswers.answerAltID
WHERE tblSurvey.surveyID = 1
关于mysql - 从多个表中删除所有相关记录，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/42613223/