awk类SQL数据处理的相关内容

阿里云文档 2021-12-02

如何使用concat_ws函数当参数为null时返回值不为null

问题描述Dataphin的数据处理SQL任务中如何实现使用concat_ws函数参数为null时，返回值不为null。即实现如果分割符为null，则返回null，参数为null，则忽略该参数。问题原因这个是hive兼容的flag。默认新建项目都会开启的。创建项目的时候可以选择数据类型的。这个参数也可...

文章 2017-11-16 来自：开发者社区

awk的类sql数据处理

简介：　　软件负载均衡一般通过两种方式来实现：基于操作系统的软负载实现和基于第三方应用的软负载实现。LVS就是基于Linux操作系统实现的一种软负载，HAProxy就是开源的并且基于第三应用实现的软负载。　　HAProxy相比LVS的使用要简单很多，功能方面也很丰富。当前，HAProxy支持两种主要的代理模式:"tcp"也即4层（大多用于邮件服务器、内部协议通信服务器等），和7层（HTTP....

文章 2017-11-15 来自：开发者社区

awk的类sql数据处理

工作中经常处理文本数据，以前经常接触db2数据库，最近在学习awk的过程中发现awk处理数据的强大，可谓无所不能！下面讲的就算awk对sql语句统计数据的模拟。一、先讲讲sql的单表操作，对应awk的单文件处理。测试环境：sco unix + db2，数据文件名file，数据库表名mytable，为保证准确性，所有语句均做测试。 &nb...

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