1.添加注释 COMMENT ON COLUMN * IS *
COMMENT ON COLUMN ST_ID IS '这是学生ID'
2.添加默认 DEFAULT ''
CREATE TABLE STUDENT(
ST_ID NUMBER(4) ,
ST_DATE DATE DEFAULT '29-9月-18'
)
1.添加注释 COMMENT ON COLUMN * IS *
COMMENT ON COLUMN ST_ID IS '这是学生ID'
2.添加默认 DEFAULT ''
CREATE TABLE STUDENT(
ST_ID NUMBER(4) ,
ST_DATE DATE DEFAULT '29-9月-18'
)