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SQL??? ALTER TABLE ?? ???? ??? ?????. ??? ??? ????. ALTER TABLE ???_?? DROP COLUMN ??_??; ??? ??? ????. ② ??? ??? ??? ??? ?????. ??? ??; ③ ???? ?????. ?? ?? ?? ????? ??? ?? ????? ???? ??? ????. ALTER TABLE ?? DROP COLUMN ??? ? ??? ??? ? ?? ???? ?? ?? ?? ??? ???? ??? ?? ? ????.

Apr 29, 2024 pm 01:15 PM

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Apr 29, 2024 pm 01:48 PM

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Apr 29, 2024 pm 01:33 PM

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Apr 28, 2024 am 10:21 AM

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Apr 28, 2024 am 09:09 AM

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