How to use oracle rank key word

Question

I am trying to rank my record using oracle key work row_number() but it just gives me an error message.
SELECT  g.csecnum "Section Number", e.iplineno "Line Number",ItemRank,
        e.eiitem  "Item Number", (i.idescrl ||'  '|| e.isupdes) "Item Description",
        i.iunits "Item Units", SUM (e.iqty) "Quantity",
        p.cprojnum "S.P. Number", p.contid, p.contid,
        p.prroute "Route Number",DECODE (TRIM (p.prroute), NULL, 'N/A',p.prroute) "Route Number",
        INITCAP (p.clocat1 || p.clocat2 || '---' || p.cdescr) "loc",
        p.cdescr "Job Description",func_get_unit_name (iunits) "Unit Name",
        (SELECT INITCAP (func_get_county_name (ccnty1))  FROM proposal  WHERE contid = '&ContractId') "County Name"
             FROM         ( SELECT  g.csecnum "Section Number", e.iplineno "Line Number",
                             e.eiitem  "Item Number", row_number() over (order by  e.eiitem asc) as ItemRank,
                              (i.idescrl ||'  '|| e.isupdes) "Item Description",
                              i.iunits "Item Units", SUM (e.iqty) "Quantity",
                               p.cprojnum "S.P. Number", p.contid, p.contid,
                               p.prroute "Route Number",DECODE (TRIM (p.prroute), NULL, 'N/A',p.prroute) "Route Number",
                               INITCAP (p.clocat1 || p.clocat2 || '---' || p.cdescr) "loc",
                               p.cdescr "Job Description",func_get_unit_name (iunits) "Unit Name",
                            (SELECT INITCAP (func_get_county_name (ccnty1))  FROM proposal  WHERE contid = '&ContractId') "County Name"
                    FROM itemlist i, estitem e, estcatg g, propproj x, proposal p
                    WHERE   p.contid = x.contid AND x.pcn = g.pcn AND e.pcn = g.pcn AND e.cn = g.cn AND i.item = e.eiitem
                                 AND i.ispecyr = p.cspecyr AND e.iplineno <> ' ' AND e.eiitem <> '2550601/01000'
                                 AND e.eiitem <> '2565601/00031' AND e.eiitem <> '2565601/00032' AND e.eiitem <> '2565601/00033'
                                 AND e.eiitem <> '2402601/01000' AND p.contid = '&ContractId'         
                               GROUP BY g.csecnum, i.iunits,p.clocat1,p.clocat2,p.contid,p.cdescr, p.cprojnum,i.iunits,p.prroute, e.iplineno,e.eiitem, i.idescrl,e.isupdes
                              ) ItemNumberRank

Answer 1

thanks guys for the help. yes, I do not have a where clause in the query that I posted here and I do not need until I convert this query to a procedure since the value for the where clause is passing from the .net page. I tried to clean it up a little bit by getting rid of all the alias and still not working ....
SELECT   ItemRank, g.csecnum , e.iplineno , e.eiitem , (i.idescrl ||'  '|| e.isupdes) ,
         SUM (e.iqty) ,  p.cprojnum , p.contid, p.prroute ,DECODE (TRIM (p.prroute), NULL, 'N/A',p.prroute) ,
         INITCAP (p.clocat1 || p.clocat2 || '---' || p.cdescr) , p.cdescr ,func_get_unit_name (iunits) ,
         (SELECT INITCAP (func_get_county_name (ccnty1))  FROM proposal  WHERE contid = '&ContractId')
FROM           (SELECT     row_number() over (order by  e.eiitem asc) as ItemRank,g.csecnum , e.iplineno , e.eiitem ,
                               (i.idescrl ||'  '|| e.isupdes) , SUM (e.iqty) ,  p.cprojnum , p.contid,
                                p.prroute ,DECODE (TRIM (p.prroute), NULL, 'N/A',p.prroute),
                                INITCAP (p.clocat1 || p.clocat2 || '---' || p.cdescr) ,
                                p.cdescr ,func_get_unit_name (iunits) ,
                             (SELECT INITCAP (func_get_county_name (ccnty1))  FROM proposal  WHERE contid = '&ContractId')
                    FROM itemlist i, estitem e, estcatg g, propproj x, proposal p
                    WHERE    p.contid = x.contid AND x.pcn = g.pcn AND e.pcn = g.pcn AND e.cn = g.cn AND i.item = e.eiitem
                                 AND i.ispecyr = p.cspecyr AND e.iplineno <> ' ' AND e.eiitem <> '2550601/01000'
                                 AND e.eiitem <> '2565601/00031' AND e.eiitem <> '2565601/00032' AND e.eiitem <> '2565601/00033'
                                 AND e.eiitem <> '2402601/01000' AND p.contid = '&ContractId'         
                               GROUP BY g.csecnum, i.iunits,p.clocat1,p.clocat2,p.contid,p.cdescr, p.cprojnum,i.iunits,p.prroute, e.iplineno,e.eiitem, i.idescrl,e.isupdes
                              ) ItemNumberRank