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MySQL 教程

MySQL 首页 MySQL 简介 MySQL RDBMS

MySQL SQL

MySQL SQL MySQL SELECT MySQL WHERE MySQL AND, OR, NOT MySQL ORDER BY MySQL INSERT INTO MySQL NULL 值 MySQL UPDATE MySQL DELETE MySQL LIMIT MySQL MIN 和 MAX MySQL COUNT, AVG, SUM MySQL LIKE MySQL 通配符 MySQL IN MySQL BETWEEN MySQL 别名 MySQL 连接 MySQL INNER JOIN MySQL LEFT JOIN MySQL RIGHT JOIN MySQL CROSS JOIN MySQL 自连接 MySQL UNION MySQL GROUP BY MySQL HAVING MySQL EXISTS MySQL ANY, ALL MySQL INSERT SELECT MySQL CASE MySQL Null 函数 MySQL 注释 MySQL 运算符

MySQL 数据库

MySQL 创建数据库 MySQL 删除数据库 MySQL 创建表 MySQL 删除表 MySQL 修改表 MySQL 约束 MySQL 非空 MySQL 唯一 MySQL 主键 MySQL 外键 MySQL 检查 MySQL 默认值 MySQL 创建索引 MySQL 自动递增 MySQL 日期 MySQL 视图

MySQL 参考

MySQL 数据类型 MySQL 函数
字符串函数 ASCII CHAR_LENGTH CHARACTER_LENGTH CONCAT CONCAT_WS FIELD FIND_IN_SET FORMAT INSERT INSTR LCASE LEFT LENGTH LOCATE LOWER LPAD LTRIM MID POSITION REPEAT REPLACE REVERSE RIGHT RPAD RTRIM SPACE STRCMP SUBSTR SUBSTRING SUBSTRING_INDEX TRIM UCASE UPPER 数值函数 ABS ACOS ASIN ATAN ATAN2 AVG CEIL CEILING COS COT COUNT DEGREES DIV EXP FLOOR GREATEST LEAST LN LOG LOG10 LOG2 MAX MIN MOD PI POW POWER RADIANS RAND ROUND SIGN SIN SQRT SUM TAN TRUNCATE 日期函数 ADDDATE ADDTIME CURDATE CURRENT_DATE CURRENT_TIME CURRENT_TIMESTAMP CURTIME DATE DATEDIFF DATE_ADD DATE_FORMAT DATE_SUB DAY DAYNAME DAYOFMONTH DAYOFWEEK DAYOFYEAR EXTRACT FROM_DAYS HOUR LAST_DAY LOCALTIME LOCALTIMESTAMP MAKEDATE MAKETIME MICROSECOND MINUTE MONTH MONTHNAME NOW PERIOD_ADD PERIOD_DIFF QUARTER SECOND SEC_TO_TIME STR_TO_DATE SUBDATE SUBTIME SYSDATE TIME TIME_FORMAT TIME_TO_SEC TIMEDIFF TIMESTAMP TO_DAYS WEEK WEEKDAY WEEKOFYEAR YEAR YEARWEEK 高级函数 BIN BINARY CASE CAST COALESCE CONNECTION_ID CONV CONVERT CURRENT_USER DATABASE IF IFNULL ISNULL LAST_INSERT_ID NULLIF SESSION_USER SYSTEM_USER USER VERSION

MySQL 例子

MySQL 示例 MySQL 编辑器 MySQL 测验 MySQL 练习 MySQL 证书

MySQL 教程

❮ 首页 下一步 ❯

MySQL 是一个广泛使用的关系型数据库管理系统 (RDBMS)。

MySQL 是免费和开源的。

MySQL 适用于小型和大型应用程序。

现在开始学习 MySQL »

各章示例

使用我们的在线 MySQL 编辑器，您可以编辑 SQL 语句，并点击按钮查看结果。

示例

SELECT * FROM Customers;
自己尝试 »

点击“自己尝试”按钮，看看它是如何工作的。

MySQL 练习

通过练习测试自己

练习

插入缺少的语句以从 Customers 表中获取所有列。

 * FROM Customers;

开始练习

MySQL 示例

通过示例学习！本教程用清晰的示例补充所有解释。

查看所有 SQL 示例

MySQL 测验

在 W3Schools 测试您的 MySQL 技能！

开始 MySQL 测验！

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MySQL 参考

在 W3Schools，您会找到 MySQL 数据类型和函数的完整参考。

MySQL 数据类型

MySQL 函数


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