An integer partitioning key is more efficient than a character key, which is more efficient than a decimal key.
整型分区键要比字符键高效，而字符键又比小数键高效。
Hold down Cmd + Opt or Shift key and drag can change the value in decimal or 10 interval.
按住Cmd +Opt或是Shift键，然后拖动可以一次改变10个单位的数值。
Hold down Cmd + Opt or Shift key and drag can change the value in decimal or 10 interval.
按住Cmd +Opt或是Shift键，然后拖动可以一次改变10个单位的数值。
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