polardb SQL函数的相关内容

阿里云文档 2024-10-11

日志服务SQL函数支持分类模型

分类判别机器学习模型可以用于在线识别或者判别系统对象的分类，比如识别每一个用户的请求是否为攻击性的请求。也可以用于识别因素之间的关联关系。本文介绍分类判别分析函数的基本语法和示例。

阿里云文档 2024-09-20

SQL与函数参考

EMR Serverless StarRocks兼容开源StarRocks的SQL语法和函数，您可以参考以下文档进行开发设计。

阿里云文档 2024-08-02

Babelfish支持的T-SQL内置函数

本文介绍不同Babelfish版本支持的T-SQL内置函数。

文章 2024-06-07 来自：开发者社区

PolarDB产品使用合集之有的sql里面有自定义存储函数如果想走列存有什么优化建议吗

问题一：PolarDB开启binlog实现主从复制会对性能有多大影响呢？ PolarDB开启binlog实现主从复制会对性能有多大影响呢？参考回答：很大，写性能差一倍以上。关于本问题的更多回答可点击原文查看：https://developer.aliyun.com/ask/584072 问题二：polarDB和...

问答 2023-12-28 来自：开发者社区

在PolarDB有的sql里面有自定义存储函数这种想走列存有什么优化建议吗？

在PolarDB有的sql里面有自定义存储函数还有的子查询里面有limit语句的这种想走列存有什么优化建议吗？自定义函数例如这种SELECT a.*, func_create_url_name(a.title) AS url_nameFROM ( SELECT con.contentid, con.catid, cat.name AS catna...

问答 2023-12-02 来自：开发者社区

PolarDB-X sql支持GROUP_CONCAT这个函数么?

阿里云文档 2023-11-08

SQL分析预置的函数类型及其使用相关说明,包括日期与时间函数、数学函数、窗口函数、聚合函数和字符串函数,以及除上述函数之外的支持其他业务场景的函数_物联网平台(IoT)

SQL分析自身预置了诸多函数，可以满足大部分业务场景的数据处理需求。本文为您介绍SQL分析提供的函数类型及函数使用相关说明。

阿里云文档 2023-08-31

这是一篇关于SQL分析提供的常见其他函数的文档

SQL分析提供了开发过程中常见的其他函数，您可以根据实际需要选择合适的函数。本文为您提供SQL分析支持的CAST、DECODE、LEAST等函数的命令格式、参数说明及示例。

文章 2022-02-17 来自：开发者社区

DRDS 支持的函数分为日期时间函数、字符串函数、转换函数、聚合函数、数学函数、比较函数、位函数、控制流程函数、信息函数、加密和压缩函数以及其他函数；JSON 函数和地理信息函数的下推执行。以下函数出现在WHERE条件、UPDATE语句中，DRDS不支持：LAST_INSERT_ID()CONNECTION_ID()CURRENT_USER(), CURRENT_USERDATABASE()S....

文章 2022-02-17 来自：开发者社区

PolarDB-X 1.0-SQL 手册-函数-日期时间函数

DRDS 支持如下日期时间函数：函数名描述ADDDATE()Add time values (intervals) to a date valueADDTIME()Add timeCURDATE()Return the current dateCURRENT_DATE(), CURRENT_DATESynonyms for CURDATE()CURRENT_TIME(), CURRENT_TIM....

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