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ALTER TABLE "mailbox"."mail_mark" |
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DROP COLUMN "mail_time", |
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ADD COLUMN "mail_time" date; |
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COMMENT ON COLUMN "mailbox"."mail_mark"."mail_time" IS '来信时间'; |
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update mail_mark mm set mm.mail_time = m.mail_time from mail m where mm.mail_id = m.id; |
