sql - GROUP BY not working in left join query -

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i m trying use group clause in left join sql query , not working. please me out, in advance.

select cust_mst_det.cust_hd_code,        cust_mst_det.first_name,        sl_head20152016.vouch_date invoice_2,        sl_head20142015.vouch_date invoice_1,        cust_mst_hd.email cust_mst_det left join sl_head20142015 on cust_mst_det.cust_hd_code=sl_head20142015.member_code left join sl_head20152016 on cust_mst_det.cust_hd_code=sl_head20152016.member_code left join cust_mst_hd on cust_mst_det.cust_hd_code=cust_mst_hd.cust_hd_code cust_mst_det.first_name!='nil' group cust_mst_det.cust_hd_code order sl_head20152016.vouch_date desc,          sl_head20142015.vouch_date

i'm not sure dbms using, on oracle query not work @ all.

  • first issue: group statement used in conjunction aggregate functions group result-set 1 or more columns. not have aggregating function in select statement (count, max, etc.)
  • second issue: must specify columns select statement in group statement (excluding columns represents results of aggregation).

as said don't know db used you, 2 points should applicable of sql standards.


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