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        Sqlite group_concat 排序

        Sqlite group_concat ordering(Sqlite group_concat 排序)

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                  本文介绍了Sqlite group_concat 排序的处理方法,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跟版网的小编来一起学习吧!

                  问题描述

                  在 Sqlite 中,我可以使用 group_concat 来做:

                  In Sqlite I can use group_concat to do:

                  1...A
                  1...B
                  1...C
                  2...A
                  2...B
                  2...C
                  
                  1...C,B,A
                  2...C,B,A
                  

                  但连接的顺序是随机的 - 根据文档.

                  but the order of the concatenation is random - according to docs.

                  我需要对 group_concat 的输出进行排序

                  I need to sort the output of group_concat to be

                  1...A,B,C
                  2...A,B,C
                  

                  我该怎么做?

                  推荐答案

                  你能不能不使用带有 order by 子句的子选择,然后对值进行分组连接?

                  Can you not use a subselect with the order by clause in, and then group concat the values?

                  类似的东西

                  SELECT ID, GROUP_CONCAT(Val)
                  FROM (
                     SELECT ID, Val
                     FROM YourTable
                     ORDER BY ID, Val
                     )
                  GROUP BY ID;
                  

                  这篇关于Sqlite group_concat 排序的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持跟版网!

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