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pdm_load, pdm_extract functionality

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Those commands work at the logical database layer (between the object layer and the physical database layer). The pdm_extract enables you to get a text copy of a table or a subset (using SELECT) of a table (specific columns and/or rows). The pdm_userload (change or remove rows) and the pdm_load (insert, change or remove rows) enable you to update a table from a properly formatted (pdm_extract) text file.

Note that since the pdm_userload and pdm_load operate below the object layer they are not restricted by any object layer rules. This makes them dangerous in the wrong hands.


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