mysql - join 2 tables using a pivot -

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can please me this...

so have 2 tables.

user_info(username,firstname,lastname,address) , user_contact(username,number,primary,alternate)

example fields in user_contacts
('abc',xxx-xxx-xxxx,1,0)
('abc',xxx-xxx-xxxx,0,1)
('abc',xxx-xxx-xxxx,0,1)
('abc',xxx-xxx-xxxx,0,1)
('def',xxx-xxx-xxxx,1,0)
('def',xxx-xxx-xxxx,0,1)
('def',xxx-xxx-xxxx,0,1)

this means user can have more 1 alternate phone numbers.

what want join 2 tables, , result like,
(username,primary number, alternate num1, alternate num2, alternate num3 .. )

what have far this, can give me 1 alternate number , not all.

select username,firstname,lastname,address,        sum(if(c.primary=1,c.number,null) primary,        sum(if(c.alternate=1,c.number,null) alternate user_info left join      user_contact c      on i.username = c.username group username

i appreciate lot. read pivote tables, im unable find answers doubts.

thanks in adv

thanks tried solve me. figured out answer it. if curious, goes way 

select username, firstname,lastname,address,  max(if(uc.`primary`=1 , uc.row_num=1, uc.number,0)) phone,  max(if(uc.row_num=2, uc.number,0)) alt1,  max(if(uc.row_num=3, uc.number,0)) alt2,  max(if(uc.row_num=4, uc.number,0)) alt3,  max(if(uc.row_num=5, uc.number,0)) alt4 user_info ui left join  (  select username, number,`primary`,alternate,      if(@type = username,@rownum:=@rownum+1,@rownum:=1) row_num,     @type := username `type`  user_contact , (select @rownum:=0 , @type:='') r  group username, number  order username, `primary` desc ) uc  on ui.username = uc.username order username

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