Getting Null value Of variable in sql server -

-

strange situation in trigger assign column value variable gives exception while inserting other table using variable.

e.g

select @srno=a.srno id=123;
insert b (srno) values (@srno) // here gives null

run above select query in query pane works fine in trigger gives me null

suggestions

alter procedure processdata
@id decimal(38,0),
@xmlstring varchar(1000),
@phone varchar(20)
as
declare

@idoc int,
@ierror int,
@serial varchar(15),
@phonenumber varchar(15),

begin
commit tran

exec sp_xml_preparedocument @idoc output,@xmlstring<br/>  select @ierror = @@error<br/>          if @ierror = 0<br/>     begin<br/>


select @serial = convert(text,[text]) openxml (@idoc,'',1) nodetype = 3 , parentid = 2

        if @serial=valid <br/>                        begin<br/>                             begin tran invalid<br/>                             begin try <br/>                             declare @phoneid decimal(38,0);<br/>                                select @phoneid = b.phoneid          inner join b on a.id = b.id a.phonenumber '%'+@senderphone + '%'<br/>          print @phoneid ; //gives null<br/>              end try<br/>             begin catch<br/>             print error_message();<br/>             end catch<br/>

you should work sets of rows in triggers, if multiple rows affected code handles rows. insert when value not null:

insert b (srno) select a.srno id=123 , a.srno not null

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