[英]Many-to-Many Relationship Query
現在,我正在嘗試查詢一個表,該表包含兩個表的ID,該表將ID保留到其他兩個表中(其中一個表將ID保留到其他表中)
地獄,我知道。
由於我是SQL的初學者,因此如何有效地查詢此信息以獲得每個表的所有詳細信息? 到目前為止,我只看到很長的Select語句集。 下面是表格的設置方法
我不確定你在問什么。 如果需要SELECT命令,它將有2個INNER聯接。 但是,如果您要獲取所有信息(和子級),則需要更多的INNER聯接。 或者,如果您正在為應用程序使用持久客戶端...。我只是不知道。 因為是不完整的數據才能做到這一點。
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