Help in using COUNT(*)

Question

Hi everyone,
pls see the query given below
select
bank_code as "Bank Code "
, e.rep_prd as "Reporting Period"
, e.act_prd as "Actual Period"
, e.nrd_sch_id as "N.R.D.Scheme Code"
, e.ac_type_id as "Account Type"
, e.ac_cat as "Category of account holder"
, e.org_mat as "Original maturity"
, e.res_mat as "Residual maturity"
, e.swift_code as "Swift code"
, e.nrd_ccy_id as "Account currency swift code"
, e.nrd_rec_type_id as "Record type code"
, e.rec_amt as "Record amount"
from rm_nrd_csr e
group by ac_type_id
in the second last row where it is blank, i need to display the number of accounts that are available for each account type, how do i modify the query ? how do i add count in the last column to display number of accounts ?

Answer 1

Hi,
872435 wrote:
its giving an error "not a GROUP BY expression"Remember the ABC's of GROUP BY:
When you use a GROUP BY clause and/or an aggregate fucntion, then item in the SELECT clause must be:
(A) an <b>A</b>ggregate function,
(B) one of the "group <b>B</b>y" expressions,
(C) a <b>C</b>onstant, or
(D) something that <b>D</b>epends entirely on the above. (For example, if you "GROUP BY TRUNC(dt)", you can "SELECT TO_CHAR (TRUNC(dt), 'Mon-DD')").
In your query, there are 13 items in the SELECT clause, but only 1 of them meets the conditions above. Perhaps you don't want to use GROUP BY at all, or you want to add all the other columns (except the COUNT (*)) to the GROUP BY clause, in which case you wou use the aggregate COUNT function, not the analytic function that LPS posted.
I hope this answers your question.
If not, post a little sample data (CREATE TABLE and INSERT statements, relevant columns only), and the results you want from that data.
Explain how you get those results from that data.
Always say what version of Oracle you're using.