mysql常用命令

  • 增加一张表

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    CREATE TABLE `table_name`(
    ...
    )ENGINE=InnoDB DEFAULT CHARSET=utf8;
  • 增加记录

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    INSERT INTO `your_table_name`(`column_name`)
    VALUES
    ('your_value_one'),
    ('your_value_two');
  • 增加字段

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    ALTER TABLE `your_table_name`
    ADD `your_column_name` ...
    AFTER `column_name`;
  • 增加索引
  • 主键

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    ALTER TABLE `your_table_name`
    ADD PRIMARY KEY your_index_name(your_column_name);
  • 唯一索引

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    ALTER TABLE `your_table_name`
    ADD UNIQUE your_index_name(your_column_name);
  • 普通索引

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    ALTER TABLE `your_table_name`
    ADD INDEX your_index_name(your_column_name);
  • 全文索引

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    ALTER TABLE `your_table_name`
    ADD FULLTEXT your_index_name(your_column_name);

  • 逐行删除

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    DELETE FORM `table_name`
    WHERE ...;
  • 清空整张表

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    TRUNCATE TABLE `your_table_name`;
  • 删除表

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    DROP TABLE `your_table_name`;
  • 删除字段

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    ALTER TABLE `your_table_name`
    DROP `column_name`;
  • 删除索引

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    ALTER TABLE `your_table_name`
    DROP INDEX your_index_name(your_column_name);

  • 变更数据

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    UPDATE `table_name`
    SET column_name=your_value
    WHERE ...;
  • 变更字段

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    ALTER TABLE `your_table_name`
    CHANGE `your_column_name` `your_column_name` ...(变更);
  • 变更字段值为另一张表的某个值

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    UPDATE `your_table_name`
    AS a
    JOIN `your_anther_table_name`
    AS b
    SET a.column = b.anther_column
    WHERE a.id = b.a_id...;

  • 普通查询

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    SELECT `column_name_one`, `column_name_two`
    FROM `table_name`;
  • 关联查询

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    SELECT *
    FROM `your_table_name`
    AS a
    JOIN `your_anther_table_name`
    AS b
    WHERE a.column_name = b.column_name...;
  • 合计函数条件查询:WHERE 关键字无法与合计函数一起使用

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    SELECT aggregate_function(column_name)
    FROM your_table_name
    GROUP BY column_name
    HAVING aggregate_function(column_name)...;
  • 同一个实例下跨库查询

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    SELECT *
    FROM database_name.your_table_name
    AS a
    JOIN another_database_name.your_another_table_name
    AS b
    WHERE a.column_name = b.column_name...;
  • 复制一张表结构

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    CREATE `your_table_name`
    LIKE `destination_table_name`;
  • 完全复制一张表:表结构+全部数据

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    CREATE TABLE `your_table_name`
    LIKE `destination_table_name`;
    INSERT INTO `your_table_name`
    SELECT *
    FROM `destination_table_name`;

附录:mysql常用命令

  • 登陆: mysql -h host -u username -p
  • 列出数据库:SHOW DATABESES;
  • 列出表:SHOW TABLES;
  • 列出表结构:DESC table_name
  • 使用一个数据库:USE database_name;
  • 导入:source ‘file’;
  • 导出:mysqldump -h 127.0.0.1 -u root -p “database_name” “table_name” –where=”condition” > file_name.sql;
  • 查看慢日志:mysqldumpslow -s [c:按记录次数排序/t:时间/l:锁定时间/r:返回的记录数] -t [n:前n条数据] -g “正则” /path