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mysql和sqlserver中查看当前库中所有表和字段信息

mysql 和 sqlserver 中查看当前库中所有表和字段信息

>>mysql :
1、查看所有表名:
show tables [from db_name];
2、查看字段信息
SHOW FULL COLUMNS FROM db_name.table_name

获取以下信息
Field :字段名
Type:字段类型
Collation:字符集(mysql 5.0 以上有)
Null :是否可以为 NULL
Key:索引(PRI,unique,index)
Default:缺省值
Extra:额外(是否 auto_increment)
Privileges:权限
Comment:备注(mysql 5.0 以上有)

1 mysql> create table teacher  # 创建teacher表
 2     -> (
 3     -> Id int (5) auto\_increment not null primary key,
 4     -> name char(10) not null, 
 5     -> address varchar(50) default 'No.1 Mid school',
 6     -> year date
 7     -> );
 8 Query OK, 0 rows affected (0.02 sec)
10 mysql> show tables;
11 +------------------+
12 | Tables\_in\_school |
13 +------------------+
14 | teacher          |
15 +------------------+
16 1 row in set (0.00 sec)
18 mysql> show full columns from teacher;  # 显示teacher表的所有字段
19 +---------+-------------+-------------------+------+-----+-----------------+----------------+---------------------------------+---------+
20 | Field   | Type        | Collation         | Null | Key | Default         | Extra          | Privileges                      | Comment |
21 +---------+-------------+-------------------+------+-----+-----------------+----------------+---------------------------------+---------+
22 | Id      | int(5)      | NULL              | NO   | PRI | NULL            | auto\_increment | select,insert,update,references |         |
23 | name    | char(10)    | latin1\_swedish\_ci | NO   |     | NULL            |                | select,insert,update,references |         |
24 | address | varchar(50) | latin1\_swedish\_ci | YES  |     | No.1 Mid school |                | select,insert,update,references |         |
25 | year    | date        | NULL              | YES  |     | NULL            |                | select,insert,update,references |         |
26 +---------+-------------+-------------------+------+-----+-----------------+----------------+---------------------------------+---------+
27 4 rows in set (0.01 sec)
29 mysql> drop table teacher;  # 删除teacher表
30 Query OK, 0 rows affected (0.03 sec)
32 mysql> show tables;
33 Empty set (0.00 sec)
35 mysql>

原文链接:https://www.cnblogs.com/Robotke1/archive/2013/04/24/3041372.html