db2的字符串连接问题!!!

各位大侠:
db2的字符串连接问题!!!
小弟在写db2的sql语句:
update table2
set name='2'+substr(name,2,length(name))
where sdfdsf like 'r:%'

时它总是报"+是非法字符"的意思,我只知道在sql server 里字符串用"+"连接的,但是db2里用什么连接呢?请告知
!
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replace '+' as ' ¦ ¦'
or use concat function
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hehe
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sql server is not db2
db2 is not sql server

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