更新块中的每个页,使之看上去为空(物理数据仍然在,但是它们的slot目录项被设为已删除)。
Updates each page of the block so that it appears empty (the physical data remains, but their slot directory entries are set to deleted).
可用值有 auto (不作特殊处理)、 always (始终将这些块放在同一页)或一个整数。
Acceptable values are auto (no special processing), always (always keeps the blocks on the same page), or an integer.
使用第一页、下一页、上一页、和最后一页链接元素指导用户分块(这些块是可以管理的)查看数据。
Use the first, next, previous, and last link elements to guide your users through your data in manageable chunks.
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