Delete From Many Tables
I am trying to delete rows from a mySQL DB that consists of multiple tables. I am trying to use a function PHP Code:
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i cant find the MySQL newsgroup, however i am hoping to pick up on some expert advice from php/mysql gurus here. I'm having some trouble performing a delete across two tables. The tables i have are: questionnaires (id, name); questionnaire_questions (questionnaires_id, id, name, qf_type) The questionnaire_questions table contains a list of questions for a specific questionnaire (indicated by the questonnaires_id). I would like to remove a questionnaire, and when doing so all corresponding questionnaire_questions who have matching id's (questionnaires.id = questionnaire_questions.questionnaires_id). I have this statement, however it only works if a questionnaire has questions... however i would like it to delete even if no questions exist for that specific questionnaire. The SQL i am using is: delete questionnaires, questionnaire_questions FROM questionnaires, questionnaire_questions WHERE questionnaires.id = questionnaire_questions.questionnaires_id AND questionnaires.id = THE_QUESTIONAIRE_TO_DELETE_ID
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