In the database schema above, speaking of the ORDER_PRODUCT table, which of the statements are true? (Multiple answers possible)
Statement 1:This table allows an n-n relation between PURCHASE_ORDER and PRODUCT
Statement 2:This table is a link / association / join table
Statement 3:This table can contain several different 'order_id' for a given 'product_id' value
Statement 4:This table should only contain one record for a given 'order_id' value
i think the statements which are true are Statment 1&2.
What do you think?
question from:
https://stackoverflow.com/questions/65713754/true-statements-in-sql-database-schema 与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…