如何将一行中的多个值拆分为单独的行?

编程入门行业动态更新时间:2024-10-25 20:30:41

本文介绍了如何将一行中的多个值拆分为单独的行?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！问题描述

我想在 sap hana sql中将一行中的多个值拆分为单独的行. 表格:

I want to split multiple values from a row into a separate row in sap hana sql. table :

id name 1 kabil,arasan

但是我想要这样的输出:

but I want an output like this:

id name 1 kabil 1 arasan

推荐答案

尝试避免在列中使用类似csv的数据，例如在ETL过程中进行规范化

您可以使用一个过程，请参阅[ HANA:拆分字符串?

，无需执行任何过程，就可以使用以下SQL(限制:它假定csv字段中的值的最大数量).我只会将其用于特殊目的.

try to avoid csv-like data in columns, e.g. normalize during ETL process

you can use a procedure, see [HANA: Split string?

without a procedure you can use the following SQL (restriction: it assumes a maximum number of values in your csv-field). I would use it only for adhoc purposes. CREATE COLUMN TABLE "TEST_SPLIT"( "SOME_KEY" VARCHAR(10), "CSV_STR" VARCHAR(1000) ); INSERT INTO "TEST_SPLIT" ("SOME_KEY", "CSV_STR") VALUES ('1', 'hello world'); INSERT INTO "TEST_SPLIT" ("SOME_KEY", "CSV_STR") VALUES ('2', 'one,two,three'); INSERT INTO "TEST_SPLIT" ("SOME_KEY", "CSV_STR") VALUES ('3', NULL); Select * from ( select "SOME_KEY" "KEY", "ELEMENT_NUMBER" "ORD", SUBSTR_REGEXPR('(?<=^|,)([^,]*)(?=,|$)' IN "TEST_SPLIT"."CSV_STR" OCCURRENCE "SERIES"."ELEMENT_NUMBER" GROUP 1) "VAL" from "TEST_SPLIT", SERIES_GENERATE_INTEGER(1, 1, 10 ) "SERIES" -- replace 10 with your max. number of values in CSV-Field ) where "VAL" is not null order by "KEY", "ORD"