vb.net - what's the best approach to do this in crystal report? -

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what's best approach in crystal report ? got 3 tables main table, sub table main , 1 item table sub of sub..it goes this..

maintable - stored main accounts.  idkey       accnt           amount ------------------------------------ 01          construction     1000.00 02          maintenance       500.00   subtable - table sub account main table stored.          - idkey table , main table equal.  idkey    idsub   subaccnt               amount ----------------------------------------- 01          01   watchtower             800.00 01          02   level 9 wall           200.00 02          03   monthly maintenance    500.00  itemtable - table items of sub table stored.           - idsub of table , subtable equal.  idsub       items        cost ----------------------------------- 01          cement       100.00 01          steel        100.00 01          labor        400.00 02          rocks        100.00 02          labor        100.00 03          labor        500.00

now want report this..

enter image description here

how ? need sub-report ? , how ? , using crystal report , vb.net..glad help..tnx in advance :)

this query might u out 

  select mt.accnt,st.subaccnt, st.amount,sum(it.cost) maintable mt     inner join subtable st on st.idkey=mt.idkey            inner join itemtable on it.idsub=st.idsub     group mt.accnt,st.subaccnt, st.amount

subreport not required , balance can achive in query or can in report itself

add group mt.accnt , add total same.


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