Oracle 10g - Set Operator Union Causing Timeout Network problem

Question

Purpose is to get all of the customers not contacted given a starting date and current date(sysdate). The problem is a timeout issue because the query is inefficient. Example: A salesman has 6,946 rows returned from the cust table where his salesid =1163. Then the inner query:
‘SELECT count(Customer_ID) FROM cust_info WHERE info_type_id = 32’
returns 225505 rows just based on this info_type_record.
Next, ‘SELECT c.customer_id
  FROM customer c,
    event e
  WHERE c.salesperson_id = 1163
  AND e.eventdate BETWEEN '10-Feb-2010' AND TRUNC(SYSDATE)
  AND c.customer_id = e.customer_id
  GROUP BY c.customer_id’
Returns 231 rows
Finally, ‘SELECT c.customer_id
  FROM customer c,
    note n
  WHERE c.salesperson_id = 1163
  AND n.created_date_time BETWEEN '10-Feb-2010' AND TRUNC(SYSDATE)
  AND n.note_type_id IN (1,3,4)
  AND c.customer_id   = n.pk_id
  AND n.table_name    = 'CUSTOMER'
  GROUP BY c.customer_id’
Returns 399 rows.
How can I improve the structure of this query(see bottom)? The following is a sample data structure:
  CREATE TABLE "CUST "
   (     "CUST_ID" NUMBER,
     "SSN" VARCHAR2(9),
                  "SSN_TYP" NUMBER(1,0),
     "CREATED_DTE_TME" DATE,
     "FULLNAME" VARCHAR2(110),
     "F_NAME" VARCHAR2(35),
     "L_NAME" VARCHAR2(40),
     "BDTE" DATE,
     "DCEASED_DTE" DATE,
     "SALES_ID" NUMBER DEFAULT NULL,
     "BRNCH_ID" NUMBER,
     "HOME_BRNCH_ID" NUMBER,
     "TTL_ASSETS" NUMBER,
     "TTL_ASSETS_DTE" DATE,
     "NO_MAILINGS" NUMBER(1,0),
     "NO_CALLS" NUMBER(1,0) ) ;
  CREATE TABLE "CUST_INFO"
   (     "CUST_INFO_ID" NUMBER,
     "CUST_ID" NUMBER,
     "INFO_TYPE_ID" NUMBER ) ;
CREATE TABLE "EVENT"
   (     "EVENT_ID" NUMBER,
     "EVENTDATE" DATE,
     "CUST_ID" NUMBER,
     "SALES_ID" NUMBER,     
                  "EVENT_INFO" VARCHAR2(4000)  )
ENABLE ROW MOVEMENT ;
CREATE TABLE “NOTE"
   (     "NOTE_ID" NUMBER,
     "NOTE_TYPE_ID" NUMBER DEFAULT 0,
     "TABLE_NAME" VARCHAR2(50),
     "PK_ID" NUMBER,
     "CREATED_DTE_TME" DATE ) ;
INSERT INTO CUST VALUES(20151,'009529433',1,'01-MAY-5','FRENCH','D','M','01-DEC-01', '05-JUN-05',1163,
NULL,0,NULL,NULL,NULL,NULL)
INSERT INTO CUST_INFO VALUES (15,1001,32)
INSERT INTO EVENT VALUES (5,'05-MAY-05',1001,1163,'NONE')
INSERT INTO NOTE VALUES (100,2,'CUST',1001,TRUNC(SYSDATE))
SELECT CUST.CUST_ID,
  SSN,
  F_NAME,
  L_NAME,
  CREATED_DTE_TME ,
  TTL_ASSETS,
  BRNCH_ID,
  SALES_ID ,
  BDTE,
  SSN_TYP,
  FULLNAME,
  Home_BRNCH_ID ,
  No_Mailings,
  No_Calls,
  DCEASED_DTE,
  TTL_ASSETS_DTE
FROM CUST
WHERE SALES_ID          = 1163
AND CUST.CUST_ID NOT IN (
  (SELECT CUST_ID FROM cust_info WHERE info_type_id = 32
UNION
  (SELECT c.CUST_ID
  FROM CUST c,
    event e
  WHERE c.SALES_ID = 1163
  AND e.eventdate BETWEEN '10-Feb-2010' AND TRUNC(SYSDATE)
  AND c.CUST_ID = e.CUST_ID
  GROUP BY c.CUST_ID
UNION
  (SELECT c.CUST_ID
  FROM CUST c,
    note n
  WHERE c.SALES_ID = 1163
  AND n.CREATED_DTE_TME BETWEEN '10-Feb-2010' AND TRUNC(SYSDATE)
  AND n.note_type_id IN (1,3,4)
  AND c.CUST_ID   = n.pk_id
  AND n.table_name    = 'CUST'
  GROUP BY c.CUST_ID
AND CUST.ssn           IS NOT NULL
AND CUST.DCEASED_DTE IS NULL
{code}
Any guidance is appreciated!                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   

Answer 1

It’s not problem with SET operator. while you are using date field in where clause, U must use date conversion function, otherwise it will stuck there
Here is the right sql, U can try with this
SELECT cust.cust_id, ssn, f_name, l_name, created_dte_tme, ttl_assets,
brnch_id, sales_id, bdte, ssn_typ, fullname, home_brnch_id,
no_mailings, no_calls, dceased_dte, ttl_assets_dte
FROM cust
WHERE sales_id = 1163
AND cust.cust_id NOT IN (
(SELECT cust_id
FROM cust_info
WHERE info_type_id = 32)
UNION
((SELECT c.cust_id
FROM cust c, event e
WHERE c.sales_id = 1163
AND e.eventdate BETWEEN to_date('10-Feb-2010','dd-mon-rrrr') AND TRUNC (SYSDATE)
AND c.cust_id = e.cust_id
GROUP BY c.cust_id)
UNION
(SELECT c.cust_id
FROM cust c, note n
WHERE c.sales_id = 1163
AND n.created_dte_tme BETWEEN to_date('10-Feb-2010','dd-mon-rrrr') AND TRUNC
(SYSDATE)
AND n.note_type_id IN (1, 3, 4)
AND c.cust_id = n.pk_id
AND n.table_name = 'CUST'
GROUP BY c.cust_id)))
AND cust.ssn IS NOT NULL
AND cust.dceased_dte IS NULL;