WebGROUP_CONCAT function. An aggregate function that returns a single string representing the argument value concatenated together for each row of the result set. If the optional separator string is specified, the separator is added between each pair of concatenated … Webgroup_concat()函数的参数是可以直接使用order by排序的。666。。下面通过例子来说明,首先看下面的t1表。 比如,我们要查看每个人的多个分数,将该人对应的多个分数显示在一起,分数要从高到底排序。可以这样 …
impala中的字符串拼接函数 - 醉城、 - 博客园
WebGROUP_CONCAT([ALL DISTINCT] expression [, separator]) Usage notes: concat() and concat_ws() are appropriate for concatenating the values of multiple columns within the same row, while group_concat() joins together values from different rows. By default, returns a single string covering the whole result set. Webimpala中拼接字符串的函数:. concat (string a, string b...) Purpose: Returns a single string representing all the argument values joined together. Return type: string Usage notes: concat () and concat_ws () are appropriate for concatenating the values of multiple columns within the same row, while group_concat () joins together values ... pyjama satin homme tunisie
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Web1、concat. concat是字符拼接函数的一种,在实际的数据提取中也是常用的,其主要 用于将输出的字段与其他字符拼接在一起 ,比如数据仓库中的某字段金额存储的只是数字,你想要在后面加上对应的单位,这个时候concat函数就派上用途了。. 用法:. concat (string s1 ... Webgroup_concat([ALL] col [, separator]) An aggregate function that returns a single string representing the argument value concatenated together for each row of the result set. If the optional separator string is specified, the separator is added between each pair of concatenated values. pyjama satin homme