scan input 扫描输入
scan input device 扫描输入设备
input pickup scan 输入扫描
multipoint scan input 多点扫描输入
memory input bus scan option 存储扫描区
Scan Input of Engineering Drawings 工程图形扫描输入
As previously stated, ordered input is essential to a merge scan join, but it is not required for nested loop joins.
如前所述，按顺序的输入对于合并扫描联接是必不可少的，但其无需嵌套循环联接。
Typically, the optimizer chooses merge scan join when the cardinality of the outer input is not obviously small and there is no efficient access method for the inner table.
通常情况下，在外部输入的基数显然不小且对于内部表没有一种有效的访问方法时，优化器会选择合并扫描联接。
Users can just scan the left column of labels up and down without being interrupted by input fields.
用户可以上下浏览标签就可以了解需要填写的数据而不会受到输入框的影响。
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