How to merge columns in multiple rows into one row in Sql function

In order to solve the problem of how to merge the columns in multiple rows into one column in Sql function, this article introduces the corresponding analysis and solutions in detail, hoping to help more partners who want to solve this problem to find a more simple and feasible way.

The code is as follows:

CREATE TABLE tb (standards varchar (50), amount varchar (50), variation varchar (50), statuss varchar (50), Reason varchar (50)) insert into tb values ') insert into tb values (' 55th) insert into tb values ('backlog', 'cross-site backlog; there are many drawing problems;') insert into tb values ('56', '300','4', 'AAAA;') insert into tb values (' 56', 300', 4', BBBB;') insert into tb values ('56', 300', 4', CCCC) ') create function test (@ standards varchar) returns varchar (8000) as begin declare @ re varchar (8000) set @ re =' 'select @ re = @ re+','+Reason from tb where @ standards=standards return (stuff (@ re,1,1,'')) end

The code is as follows:

Select distinct standards,amount,variation,statuss,Reason = dbo.test ('55') from tb where standards=55 select distinct standards,amount,variation,statuss,Reason = dbo.test (' 56') from tb where standards=56

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