oracle - SQL: not a single group function .... not a GROUP BY expression -


this question has answer here:

i have number of tables detailing shop's customers , sales, etc.

i want find minimum sale price; i.e. single result returned sql expression.

in order result make sense want join customer_sale table customer table (so customer in question have his/her name returned).

using following code

select cust_order.cust_id, customer.fname, customer.lname, min(sale_price) cust_order inner join customer on cust_order.cust_id = customer.cust_id group cust_order.cust_id having min(sale_price) = (select min(sale_price) cust_order group cust_id)

in oracle 11g throws following error:

error @ line 1: ora-00979: not group expression

which makes sense return single result.

however deleting group clauses causes dbms throw following error:

select cust_order.cust_id, customer.fname, customer.lname, min(sale_price) cust_order inner join customer on cust_order.cust_id=customer.cust_id having min(sale_price) = (select min(sale_price) cust_order)

error @ line 1: ora-00937: not single-group group function

is there additional nesting have statement execute correctly?

if you're getting min entire table, perhaps this:

select distinct cust_order.cust_id, customer.fname, customer.lname, sale_price cust_order inner join customer on cust_order.cust_id=customer.cust_id sale_price = (select min(sale_price) cust_order)

i'm not sure if need distinct or not, or how data looks.


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