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2025-09-25 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Database >
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The specific operations are as follows:
The original field bookdetails is varchar2 (4000), and the original table already has business data.
ALTER TABLE test
ADD (bookdetails01 CLOB)
UPDATE test SET bookdetails01=bookdetails
COMMIT
ALTER TABLE test DROP COLUMN bookdetails
ALTER TABLE atable
RENAME COLUMN bookdetails01 TO bookdetails
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