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alter table project_correlation
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add "maintenanceETime" timestamp with time zone;
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comment on column project_correlation."maintenanceETime" is '维保结束时间'
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alter table project_correlation
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add "maintenanceSTime" timestamp with time zone;
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comment on column project_correlation."maintenanceSTime" is '维保开始时间';
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alter table project_correlation
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rename column "maintenanceETime" to maintenance_end;
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alter table project_correlation
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rename column "maintenanceSTime" to maintenance_start;
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