Select expression in SQL SERVER 】 【 choice w

use select @ a = @ a + ... the writing tin be the outcome rows into columns displayed ,Lacoste Trainers 2010
affirm @ a varchar (100),Lacoste Trainers 2011, @ b varchar (100)
Select @ a = 'hxy, 9993,Womens Lacoste Shua Trainers,0001, admin'
Select @ b =''
Select @ b = @ b +','+ ryxm from css_rydj Where CharIndex (',Lacoste Protect Laser Trainers,'+ Rtrim (rybm )+',',','+a +',')> 0
select @ b
the terminal output is
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