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Create table #y (txt text)
select name, iid = identity(int,1,1) into #x from SysObjects where xtype = 'TR'
declare @i int, @max int
declare @name varchar(40)
set @i = 1
select @max = max(iid) from #x
while @i <= @max
begin
    select @name = name from #x where iid = @i
    insert #y (txt)
    exec('sp_helptext ' + @name)
    set @i = @i + 1
end
select * from #y
drop table #x
drop table  #y