如何检索或阅读 SQL 中特定列的评论
How to retrieve or read comments of particular column in SQL
我已经为专栏添加了一些评论
COMMENT ON COLUMN STUDENT.STUDENT_NAME
IS 'This is comment for the column';
COMMENT on column student.student_name 'THIS IS COMMENT FOR THE COLUMN' succeeded.
如何使用查询查看它?
你试过这个吗:
select * from user_tab_comments where table_name='STUDENT'
或者这个:
select * from all_tab_comments where table_name='STUDENT'
推测您正在使用 ORACLE
RDBMS。在这种情况下,您可以使用 user_col_comments
系统视图:
SELECT comments
FROM user_col_comments
WHERE TABLE_NAME = 'STUDENT' AND COLUMN_NAME = 'STUDENT_NAME'
我已经为专栏添加了一些评论
COMMENT ON COLUMN STUDENT.STUDENT_NAME
IS 'This is comment for the column';
COMMENT on column student.student_name 'THIS IS COMMENT FOR THE COLUMN' succeeded.
如何使用查询查看它?
你试过这个吗:
select * from user_tab_comments where table_name='STUDENT'
或者这个:
select * from all_tab_comments where table_name='STUDENT'
推测您正在使用 ORACLE
RDBMS。在这种情况下,您可以使用 user_col_comments
系统视图:
SELECT comments
FROM user_col_comments
WHERE TABLE_NAME = 'STUDENT' AND COLUMN_NAME = 'STUDENT_NAME'