sql - How to include string text in a STUFF function (XML Path)? -


code: 

isnull(ltrim(stuff( (select ', ' + pl.pipe_product                             reporting.pipelineinformation pl                             pl.project_id = ti.project_id                              xml path('')), 1, 1, '')),'___________') pipe_product

how can this?

another approach can add row_number sub-query decide whether comma or , should inserted. should faster since don't have separate queries against same pipelineinformation table both of correlated sub-queries.

declare @pl table (pipe_product varchar(50), project_id int) insert @pl values ('gas', 1),('oil', 1),('orange juice', 1), ('milk', 2), ('honey', 2)   select     ti.project_id,     substring((         select             case when rownum = 1 ' , ' else ', ' end + t.pipe_product [text()]         (             select                  pipe_product,                 project_id,                 row_number() on (order pipe_product desc) rownum             @pl             project_id = ti.project_id             ) t         order rownum desc         xml path('')     ), 3, 4000) [pipe_product] (select 1 union select 2) ti (project_id)

the sample data above outputs:

project_id  pipe_product ----------- ----------------------------- 1           gas, oil , orange juice 2           honey , milk

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