For every row that moves, there are two actions - insert and delete.
对于所移动的每一行,有两个动作—insert和delete。
Notice the use of the index function within the at attribute of the insert and delete actions.
请注意insert和delete动作的at属性内index函数的使用。
The old version of the redistribute utility USES special insert and delete with sub-select statements.
旧版本的重分发实用程序通过子选择语句使用特殊的insert和delete。
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