The NOT NULL attribute of column Credit_Line in table ACCOUNT has to be dropped because some other account types have been added that do not have a credit line.
ACCOUNT 表中的 Credit_Line 列的 NOT NULL 属性必须删除,这是因为添加了没有信用行的其他账号类型。
Consider a banking application where there is a very large account table for one of the dimensions.
考虑一个银行应用程序,其中针对一个维度有一个极其大型的帐户表。
Select the ACCOUNT table from the list of available tables for this schema.
从这个模式的可用表列表中选择account表。
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