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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