命令SQL用法速查的相关内容

阿里云文档 2026-06-11

使用Jindo sql分析JindoFS和OSS访问日志及元数据-开源大数据平台 E-MapReduce-阿里云

Jindo sql命令是JindoFS自带的工具，方便您分析JindoFS访问日志、元数据和OSS访问日志。本文为您介绍如何使用Jindo sql命令，分析JindoFS访问日志、元数据和OSS访问日志的数据。

阿里云文档 2026-05-27

如何使用SQL命令COMPACTION

Compaction可以把所有的数据文件按照一定策略进行Merge操作，可提升查询效率。

阿里云文档 2026-05-20

PolarDB MySQL支持通过控制台或SQL命令管理边缘集群账号密码，包括修改密码、设置过期时间和配置密码验证功能。

您可以在控制台或使用SQL命令来管理PolarDB MySQL版边缘集群的账号密码。

阿里云文档 2026-04-16

PolarDB MySQL版边缘集群支持通过控制台或SQL命令管理高权限、普通及全局只读账号的数据库权限，包括授予、修改和重置多种权限类型。

您可以在控制台或使用SQL命令来管理PolarDB MySQL版边缘集群的账号权限。

文章 2022-04-20 来自：开发者社区

MySQL专题系统归纳快速上手（常用cmd命令，常用函数汇总，SQL语句精讲带示例）适用初学、用法速查(三)

✨SQL语句ʚʕ̯•͡˔•̯᷅ʔɞ注释sql语句中的注释写法：两个“-”符号加一个空格。-- xxxxxxxxxxxxxxx ʚʕ̯•͡˔•̯᷅ʔɞ关于数据库 ꧔ꦿ查看所有数据库 show databases; ꧔ꦿ创建一个数据库 create database database_name; ꧔ꦿ创建一个数据库并先判断是否存在：如果用一个已经存在的数据库的名字来创建，则会报...

文章 2022-04-20 来自：开发者社区

MySQL专题系统归纳快速上手（常用cmd命令，常用函数汇总，SQL语句精讲带示例）适用初学、用法速查(二)

✨MySQL函数ʚʕ̯•͡˔•̯᷅ʔɞ聚合函数函数描述参数COUNT()计数参数为字段名，返回目标字段非空值的行数；参数为*，即count(*)，则返回表中所有记录的总数。SUM()求和字段AVG()求平均值字段MAX()最大值字段MIN()最小值字段ʚʕ̯•͡˔•̯᷅ʔɞ数学函数函数描述参数ABS()abs(x)返回x的绝对值参数可以是一个数字，也可以一个字段。FLOOR()floor(x....

文章 2022-04-20 来自：开发者社区

MySQL专题系统归纳快速上手（常用cmd命令，常用函数汇总，SQL语句精讲带示例）适用初学、用法速查(一)

文章目录 ✨进入与退出✨数据类型ʚʕ̯•͡˔•̯᷅ʔɞ数值类型꧔ꦿ整数类型꧔ꦿ小数类型浮点数FLOAT&DOUBLE定点数DECIMALʚʕ̯•͡˔•̯᷅ʔɞ字符串类型ʚʕ̯•͡˔•̯᷅ʔɞ日期类型ʚʕ̯•͡˔•̯᷅ʔɞ枚举类型✨MySQL函数ʚʕ̯•͡˔•̯᷅ʔɞ聚合函数ʚʕ̯•͡˔•̯᷅ʔɞ数学函数ʚʕ̯•͡˔•̯᷅ʔɞ字符串函数ʚʕ̯•͡˔•̯᷅ʔɞ日期和时间函数ʚʕ̯...

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云数据库SQL Server，具有企业许可授权，权限更为开放，引擎功能更为强大。能完美支持Windows平台的.NET架构，支持复杂SQL查询，性能优秀，并有强大的可视化管理工具，帮助您轻松管理数据。

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