Correct the query

Question

Hi,
I am getting different output. could anybody please suggest me what is the difference between below two query and correct the 2nd query
SELECT
COUNT(DISTINCT CASE WHEN B.LSDT >= SYSDATE - 45 AND A.COUNTRY_CD='IN' THEN B.INDIVIDUAL_ID END) AS US_45
,COUNT(DISTINCT CASE WHEN B.LSDT >= SYSDATE - 105 AND A.COUNTRY_CD='IN' THEN B.INDIVIDUAL_ID END) AS US_105
,COUNT(DISTINCT CASE WHEN B.LSDT >= SYSDATE - 195 AND A.COUNTRY_CD='IN' THEN B.INDIVIDUAL_ID END) AS US_195
,COUNT(DISTINCT CASE WHEN B.LSDT >= SYSDATE - 380 AND A.COUNTRY_CD='IN' THEN B.INDIVIDUAL_ID END) AS US_380
,COUNT(DISTINCT CASE WHEN B.LSDT >= SYSDATE - 745 AND A.COUNTRY_CD='IN' THEN B.INDIVIDUAL_ID END) AS US_745
FROM order B, addr A
WHERE B.INDIVIDUAL_ID = A.INDIVIDUAL_ID
AND B.INDIVIDUAL_ID IN (
SELECT C.INDIVIDUAL_ID
FROM order C
WHERE C.PROD_STAT_MKE_CD IN ('A', 'B')
AND C.LAST_PAYMENT_DT >= SYSDATE - 745)
AND A.COUNTRY_CD ='IN';
SELECT
COUNT(DISTINCT CASE WHEN B.LSDT >= SYSDATE - 45 AND A.COUNTRY_CD='IN' THEN B.INDIVIDUAL_ID END) AS US_45
,COUNT(DISTINCT CASE WHEN B.LSDT >= SYSDATE - 105 AND A.COUNTRY_CD='IN' THEN B.INDIVIDUAL_ID END) AS US_105
,COUNT(DISTINCT CASE WHEN B.LSDT >= SYSDATE - 195 AND A.COUNTRY_CD='IN' THEN B.INDIVIDUAL_ID END) AS US_195
,COUNT(DISTINCT CASE WHEN B.LSDT >= SYSDATE - 380 AND A.COUNTRY_CD='IN' THEN B.INDIVIDUAL_ID END) AS US_380
,COUNT(DISTINCT CASE WHEN B.LSDT >= SYSDATE - 745 AND A.COUNTRY_CD='IN' THEN B.INDIVIDUAL_ID END) AS US_745
FROM order B, addr A
WHERE B.INDIVIDUAL_ID = A.INDIVIDUAL_ID and A.COUNTRY_CD ='IN'
and (PROD_STAT_MKE_CD IN ('A', 'B') AND LAST_PAYMENT_DT >= SYSDATE - 745);

Answer 1

The two queries are asking quite different questions.
The first looks for all individuals who have a country code of IN and also have a row in the order table (possibly even a different one with prod_stat_mke_cd either A or B and a last_payment_dt sometime in the last 745 days.
The second, looks for a row where the country code is IN and prod_stat_mke_cd is either A or B and has a last_payment_dt sometime in the last 745 days.
So, given these three rows:
individual_id  country_code prod_stat_mke_cd last_payment_dt
12345          IN           C                01-Jan-2011
12345          IN           A                01-Jan-2011
12345          IN           B                01-Jan-2011your first query will return the all three, while your second query will only return the last two rows.
What exactly are you expecting?
John