... 二，页压缩（Page Compression） 1，前缀压缩（Prefix Compression） 2，字典压缩（Dictionary Compression） ...
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In lossless compression area, dictionary compression method has been regarded as a kind of better method. It has higher compressionratio and is accomplished quickly, however it couldn’t dispose of the relation between global and local adaptability.
在无损压缩算法中,字典压缩作为一种高压缩比,速度快的方法也得到人们的一致认可,但在局部和全局性能上,该类算法没有能够得到有效的处理。
参考来源 - 一种改进的LZW压缩算法 in C·2,447,543篇论文数据，部分数据来源于NoteExpress
如果有，那么它们仍然生成一个压缩字典，但是在这里，没有被压缩的记录，因为所有数据已经被移到表中。
If so, they still generate a compression dictionary, but in this case, there is no compressed record, as all data has already been moved into the table.
此外，只有当物理表数据对象或分区中没有压缩字典时，才能运行adc。
Additionally, ADC only occurs if no compression dictionary exists within the physical table data object or partition.
重组表来创建一个压缩字典然后压缩现有内容，例如。
Reorganize the table to create a compression dictionary and compress the existing contents.Eg.
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