问WHERE子句中的TERADATA case when语句ENWhere 是一个约束声明，使用Where约束来自数据库的数据，Where是在结果返回之前起作用的，Where中不能使用聚合函数。 Having是一个过滤声明，是在查询返回结果集以后对查询结果进行的过滤操作，在Having中可以使用聚合函数。 在查询过程中聚合语句(sum,min,max,avg,count)要比having子句优先执行。而where子句在查询过程...
SELECT order_id, CASE WHEN status = 'pending' THEN '待处理' WHEN status = 'processing' THEN '处理中' WHEN status = 'completed' THEN '已完成' ELSE '未知状态' END AS status_desc FROM orders; 根据订单金额对订单进行分类: 代码语言:sql 复制 SELECT order_id, CASE WHEN amount < 1000 THEN ...
2.查询结果 sel col_type,casewhencol1<>''thencol1whencol2<>''thencol2whencol3<>''thencol3whencol4<>''thencol4else'default'endfetch_value ,col1,col2,col3,col4fromtest1orderby3desc,4desc,5desc,6desc;
How to use the CASE Statement in Teradata? When we need to create a calculated field based on some conditional, Teradata’s CASE Statement can be used. Here we specify different conditionals under the WHEN Statement, based on what the result set is derived. If in case no conditional is met...
SQLCasewhen的使用方法 http://blogs.com/yazdao/archive/2009/12/09/1620482.html Case具有两种格式。简单Case函数和Case搜索函数。 --简单Case函数CASEsexWHEN'1'THEN'男'WHEN'2'THEN'女'ELSE' 其他'END--Case搜索函数CASEWHENsex='1'THEN'男'WHENsex= '2'THEN'女'ELSE'其他'END 这两种方式,可以实现...
case 语句 简单case表达式 case 变量 when 值1 then 执行块; when 值2 then 执行块; when 值3 then 执行块; ...Shell中条件测试、if语句、和case分支语句 目录 一、条件测试 二、if语句的结构 三、case语句结构 (别忘了双分号!!!)一、条件测试 1.1条件测试操作 ●test命令 测试表达式是否成立,若成立返...
I am facing an issue in our Teradata QA environment where a simple query that ran in under 1 minute is now taking 12 minutes to complete. This select is pulling 5 fields based on a simple inner join I... WIF manually generate federationmetadata.xml ...
Spokesperson: Lisa Arthur, former CMO of Teradata Case study summary: In 2009 Teradata undertook an Agile marketing implementation that needed about nine months to complete. The company collaborated with Gartner to make the successful transformation. They automated workflows and approval processes as well...
Teradata CASE and COALESCE Functions - Learn about the Teradata CASE and COALESCE functions, their syntax, usage, and practical examples to enhance your data manipulation skills in Teradata.
IN操作符转换为EXISTS/NOT EXISTS时,子查询的SELECT子句包含aggregate函数,则可能导致迁移失败。 Teradata 如果含有FORMAT参数的case语句未用半角括号“()”括起来,该语句不会处理。 例如: 1 case when column1='0' then column1='value' 来自:帮助中心 查看更多 → 类型转换 类型转换 概述 操作符 函数 值...