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  • mysql基本操作(二)

    1、向表msg中插入数据,先创建表,再插入数据

    mysql> create table msg (
    -> id int,
    -> title varchar(60),
    -> name varchar(10),
    -> content varchar(1000)
    -> );
    Query OK, 0 rows affected (0.08 sec)

    mysql> insert into msg (id,title,name,content) values (1,"初来乍到","张三","我是老大");
    ERROR 1366 (HY000): Incorrect string value: 'xE5x88x9DxE6x9DxA5...' for column 'title' at row 1

    插入报错,是因为数据库没有设置字符集原因,设置如下:

    修改数据库的字符集

    mysql> alter database test character set utf8;
    Query OK, 1 row affected (0.10 sec)

    修改数据库表字符集

    mysql> alter table msg character set utf8;
    Query OK, 0 rows affected (0.10 sec)
    Records: 0 Duplicates: 0 Warnings: 0

    修改每个表字段的字符集

    mysql> alter table msg change title title varchar(60) character set utf8;
    Query OK, 0 rows affected (0.33 sec)
    Records: 0 Duplicates: 0 Warnings: 0

    mysql> alter table msg change name name varchar(60) character set utf8;

    Query OK, 0 rows affected (0.14 sec)

    mysql> alter table msg change content content varchar(1000) character set utf8;
    Query OK, 0 rows affected (0.16 sec)
    Records: 0 Duplicates: 0 Warnings: 0

    或者执行

    set names utf8;

    2、更新数据

    mysql> update msg set name="王五",content="我只想当老二" where msg.id=2;
    Query OK, 1 row affected (0.02 sec)
    Rows matched: 1 Changed: 1 Warnings: 0

    mysql> select * from msg;
    +------+--------------+--------+--------------------+
    | id | title | name | content |
    +------+--------------+--------+--------------------+
    | 1 | 初来乍到 | 张三 | 我是老大 |
    | 2 | 刚来不久 | 王五 | 我只想当老二 |
    +------+--------------+--------+--------------------+
    2 rows in set (0.00 sec)

    mysql>

    3、删除表数据

    mysql> delete from msg where id=3;
    Query OK, 1 row affected (0.02 sec)

    5、查询表数据

    mysql> select id,name from msg;
    +------+--------+
    | id | name |
    +------+--------+
    | 1 | 张三 |
    | 1 | 刘备 |
    | 2 | 关于 |
    +------+--------+
    3 rows in set (0.00 sec)

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  • 原文地址:https://www.cnblogs.com/heruiguo/p/8335609.html
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