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数据集成最常见的两种方法是( )。
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数据关联必须要有关联条件。( )
全连接是指满足关联条件的左右表数据相连。不满足条件的各表数据均为空。( )
Writing a few lines of words on paper describing your business strategy does not suggest that you are making a business plan.
Business plans help businesses clarify their objectives and strategies for doing activities in the future.
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