Materialized View creation advice and SQL advice

Question

I want to create a materialized view for the table below. The materialized view should query data from only this table and i want to join 2 rows to one.
The key for the joins are the column internal_correlation_id which is unique for request/response pair.
The table is updated every day with 2 million rows.
What type of materialized view should i use and how can i query to get one row?
CREATE TABLE EVENT (
       caller_id                              VARCHAR2(255)          NOT NULL
     , service_id                         VARCHAR2(255)          NOT NULL
     , country_code                         VARCHAR2(2)
     , internal_correlation_id                  VARCHAR2(255)          NOT NULL  -- Unique for request response pair
     , received_date                         DATE                    NOT NULL
     , status                              VARCHAR2(20)
     , queue_name                         VARCHAR2(255)          NOT NULL
     , USER_ID                              VARCHAR2(50)
     , engine_id                         VARCHAR2(50)
     , tracking_correlation_id                  VARCHAR2(2000)
     , mnc                              VARCHAR2(20)
     , mcc                              VARCHAR2(20)
     , request_type                         VARCHAR2(50)  -- REQUEST or RESPONSE
     , app_id                              VARCHAR2(50)
     , failure_code                         VARCHAR2(50)
     , failure_string                            VARCHAR2(255)
     , created_date                          DATE DEFAULT SYSDATE
    , updated_date                              DATE DEFAULT SYSDATE
    DB release 11G release 1
Edited by: Alekons01 on Mar 24, 2012 2:43 PM

Answer 1

Anyway, I don't believe you will be able to create MV with fast refresh. MV with complete refresh:
CREATE MATERIALIZED VIEW event_mv
  BUILD IMMEDIATE
  REFRESH COMPLETE ON DEMAND
  AS
    SELECT  e1.caller_id req_caller_id,
            e1.service_id req_service_id,
            e1.country_code req_country_code,
            e1.internal_correlation_id req_internal_correlation_id,
            e1.received_date req_received_date,
            e1.status req_status,
            e1.queue_name req_queue_name,
            e1.user_id req_user_id,
            e1.engine_id req_engine_id,
            e1.tracking_correlation_id req_tracking_correlation_id,
            e1.mnc req_mnc,
            e1.mcc req_mcc,
            e1.request_type req_request_type,
            e1.app_id req_app_id,
            e1.failure_code req_failure_code,
            e1.failure_string req_failure_string,
            e1.created_date req_created_date,
            e1.updated_date req_updated_date,
            e2.caller_id rsp_caller_id,
            e2.service_id rsp_service_id,
            e2.country_code rsp_country_code,
            e2.internal_correlation_id rsp_internal_correlation_id,
            e2.received_date rsp_received_date,
            e2.status rsp_status,
            e2.queue_name rsp_queue_name,
            e2.user_id rsp_user_id,
            e2.engine_id rsp_engine_id,
            e2.tracking_correlation_id rsp_tracking_correlation_id,
            e2.mnc rsp_mnc,
            e2.mcc rsp_mcc,
            e2.request_type rsp_request_type,
            e2.app_id rsp_app_id,
            e2.failure_code rsp_failure_code,
            e2.failure_string rsp_failure_string,
            e2.created_date rsp_created_date,
            e2.updated_date rsp_updated_date
      FROM  event e1,
            event e2
      WHERE e2.internal_correlation_id = e1.internal_correlation_id
        AND e1.request_type = 'REQUEST'
        AND e2.request_type = 'RESPONSE'
/SY.