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Из devGuide:
The delete_from statement enables you to delete multiple records from the database at the same time. This means that there is only one call required to the database from the Microsoft Dynamics AX client. as opposed to the multiple calls required if you use the delete statement.
This reduction in the number of calls required speeds up system performance. It also enables you to specify multiple deleted items in a clearer, simpler manner.
In situations where the delete method is overridden, the system transparently emulates the situation of selecting and deleting one record at a time so that the overridden delete method is executed.
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