How to find this count...

Question

Hi all,
I have two tables like this.
desc tp030_actl_mstr 
Name                         Type                                                                                                                        
PLN_YEAR_Y                 NUMBER(4)                                                                                                                                                                                                                                                                                                                                                   
CD_SITE_CODE          VARCHAR2(5)                                                                                                                                                                    
ACMT_ACTUAL_REF_R          VARCHAR2(6)
ACMT_ACT_EFF_Y             DATE                                                                                                                                                                                         
ACMT_ACT_ISSD_Y            DATE
desc tp031_actl_dtl
Name                         Type                                                                                                                        
PLN_YEAR_Y                 NUMBER(4)                                                                                                                                                                                                                                                                                                                                                   
CD_SITE_CODE               VARCHAR2(5)                                                                                                                                                                                                                                                                                                                                              
ACMT_ACTUAL_REF_R          VARCHAR2(6)
ACMT_ACT_EFF_Y             DATE                                                                                                                                                                                         
ACMT_ACT_ISSD_Y            DATE
ACDT_EST_AUG_VOL_Q         NUMBER(12)here so ACMT_ACTUAL_REF_R is link between these two tables..
and same ACMT_ACTUAL_REF_R are present in both tables...and child table will some additional information.
Now i need to find "which ACMT_ACTUAL_REF_R having multiple CD_SITE_CODE and its count and where ACMT_ACT_EFF_Y,ACMT_ACT_ISSD_Y is not null and
ACDT_EST_AUG_VOL_Q >0
any help will be appreciated..
Version 10G
Thanks &
Regards
asp

Answer 1

Hi, Asp,
You can use GROUP BY and HAVING, somethig like this:
SELECT       m.acmt_actual_ref_r
,       COUNT (*)          AS cnt
FROM       tp030_actl_mstr     m
JOIN       tp031_actl_dtl     d  ON     m.acmt_actual_ref_r     = d.acmt_actual_ref_r
WHERE       d.acmt_act_eff_y     IS NOT NULL
AND       d.acmt_act_issd_y     IS NOT NULL
AND       d.acdt_est_aug_col_q     > 0
GROUP BY  m.acmt_actual_ref_r
HAVING       COUNT (DISTINCT cd_site_code)     > 1
HAVING is like another WHERE clause, but WHERE is applied before the GROUP BY, and HAVING is done after it, so you can use aggregate functions (such as COUNT) in the HAVING clause.
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.