Oracle中查询某个表的总字段数,要用SQL语句,或者在PL/SQL里面
select count(column_name) from user_tab_columns where table_name='T_B_AUDITOR'
能够查出来指定的那张表的字段数。
下面是通过大致查看:
select tname,count(*) from col group by tname;
64 T_A_BOOKSTAGEINFO 4
65 T_B_AUDITOR 14
66 T_B_BOOKMANAGEMENT 13
67 T_B_BOOKSTATUSCONFIG 5
68 T_B_CODETREEINFO 8
69 T_B_FILTERWORD 11
70 T_B_ISBNWHITELIST 11
71 T_B_MODEL 10
72 T_B_NOTICE 15
73 T_B_NOTICEACCEPT 11
74 T_B_OPERLOG 10
75 T_B_ORGANIZATIONINFO 18
76 T_B_PREFIXINFO 15
77 T_B_PUBLISHINFO 30
78 T_B_ROLE 8
79 T_B_ROLEMODEL 6
80 T_B_SAMPLEBOOKINFO 89
81 T_B_USER 26
82 T_B_USERANDROLE 6
83 T_B_USERLOGIN 8
84 T_B_USERMODEL 6
此时我就联想到了mysql上面去:
直接利用函数来解决:
mysql> desc test;
+---------+-------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+---------+-------------+------+-----+---------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| name | varchar(10) | YES | | NULL | |
| address | varchar(30) | YES | | NULL | |
+---------+-------------+------+-----+---------+----------------+
3 rows in set (0.01 sec)
mysql> select found_rows();