create table ctable_name ( field1 varchar2(20), --注释的内容1 field2 number, --注释的内容2 field3 char(2), --注释的内容3 field4 date ) --select * from ctable_name; comment on table ctable_name is '对表注释的内容'; select * from user_tab_comments where table_name = 'CTABLE_NAME'; comment on column ctable_name.field1 is '对field1列注释的内容'; select * from user_col_comments where table_name = 'CTABLE_NAME' and column_name = 'FIELD1';
这个是对字段的注释,对表数据和表结构没有影响,
你可以在查看表和编辑界面看到他的注释
COMMENT ON TABLE T_KD_BACKUP_PARAM IS '数据归档参数表'; COMMENT ON COLUMN T_KD_BACKUP_PARAM.ID IS '序号'; COMMENT ON COLUMN T_KD_BACKUP_PARAM.PARAMNAME IS '参数名称'; COMMENT ON COLUMN T_KD_BACKUP_PARAM.PARAMVALUE IS '参数值'; COMMENT ON COLUMN T_KD_BACKUP_PARAM.PARAMPURPOSE IS '参数用途';