在oracle中建了很多表：cui ，kai，student。想显示student的所有字段含义。我在pl/SQL中输入了SELECT * FROM USER_COL_COMMENTS ;立即显示如下：
TABLE_NAME COLUMN_NAME COMMENTS
------------------------------ ------------------------------ --------------------------------------------
CUI A
CUI B
KAI S
KAI D
KAI F
STUDENT ID 序列号
STUDENT AGE 年龄
STUDENT SEX 性别