Need Help with complex query for productio database

Question

Hello again,
i need your help again, for an query how Shows me how long every production step takes per Order.
See sample data and what i expect.
Thank you all for your help.
We use Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
Here the sample data tables:
CREATE      TABLE      TABLE_2
(     "ORDER_NR"      VARCHAR2 (12)
,      "PRIORITY"      VARCHAR2 (2)
,      "WO_STEP"      VARCHAR2 (1)
,      "STEP_DATE"      DATE
CREATE      TABLE      TABLE_1
(     "ORDER_NR"           VARCHAR2     (12) PRIMARY KEY
,      "PRIORITY"           VARCHAR2      (2)
,      "CREATE_DATE"      DATE
,     "ACT_STEP"          VARCHAR2     (2)
,     "STEP_DATE"          DATE
,     "EMPLOYEE"          VARCHAR2     (5)
,     "DESCRIPTION"     VARCHAR2     (20)
INSERT      INTO      TABLE_1      (ORDER_NR,               PRIORITY,      CREATE_DATE,                                                        ACT_STEP,     STEP_DATE,                                                            EMPLOYEE,     DESCRIPTION)
                    VALUES           ('1KKA1T205634',     '12',          TO_DATE('10-FEB-13 10:00:00','DD-MON-RR HH24:MI:SS'),     'U',          TO_DATE('28-FEB-13 12:00:00','DD-MON-RR HH24:MI:SS'),     'W0010',     'CLEAN HOUSE');
INSERT      INTO      TABLE_1      (ORDER_NR,               PRIORITY,     CREATE_DATE,                                                        ACT_STEP,     STEP_DATE,                                                            EMPLOYEE,     DESCRIPTION)
                    VALUES           ('1KKA1Z300612',     '12',          TO_DATE('08-FEB-13 14:00:00','DD-MON-RR HH24:MI:SS'),     'F',          TO_DATE('20-FEB-13 16:00:00','DD-MON-RR HH24:MI:SS'),     'K0052',     'REPAIR CAR');
INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                    VALUES           ('1KKA1T205634',     '12',          'A',          TO_DATE('12-FEB-13 13:00:00','DD-MON-RR HH24:MI:SS'));
INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                    VALUES           ('1KKA1T205634',     '12',          '5',          TO_DATE('13-FEB-13 09:00:00','DD-MON-RR HH24:MI:SS'));
INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                    VALUES           ('1KKA1T205634',     '12',          'K',          TO_DATE('13-FEB-13 10:00:00','DD-MON-RR HH24:MI:SS'));
INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                    VALUES           ('1KKA1T205634',     '12',          '5',          TO_DATE('13-FEB-13 11:00:00','DD-MON-RR HH24:MI:SS'));
INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                    VALUES           ('1KKA1T205634',     '12',          'K',          TO_DATE('13-FEB-13 12:00:00','DD-MON-RR HH24:MI:SS'));
INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                    VALUES           ('1KKA1T205634',     '12',          '5',          TO_DATE('13-FEB-13 16:00:00','DD-MON-RR HH24:MI:SS'));
INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                    VALUES           ('1KKA1T205634',     '12',          'C',          TO_DATE('14-FEB-13 08:00:00','DD-MON-RR HH24:MI:SS'));
INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                    VALUES           ('1KKA1T205634',     '12',          'B',          TO_DATE('14-FEB-13 10:00:00','DD-MON-RR HH24:MI:SS'));
INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                    VALUES           ('1KKA1T205634',     '12',          'E',          TO_DATE('18-FEB-13 13:00:00','DD-MON-RR HH24:MI:SS'));
INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                    VALUES           ('1KKA1T205634',     '12',          'F',          TO_DATE('20-FEB-13 16:00:00','DD-MON-RR HH24:MI:SS'));
INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                    VALUES           ('1KKA1T205634',     '12',          'S',          TO_DATE('21-FEB-13 08:00:00','DD-MON-RR HH24:MI:SS'));
INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                    VALUES           ('1KKA1T205634',     '12',          'R',          TO_DATE('21-FEB-13 09:00:00','DD-MON-RR HH24:MI:SS'));
INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                    VALUES           ('1KKA1T205634',     '12',          'U',          TO_DATE('28-FEB-13 12:00:00','DD-MON-RR HH24:MI:SS'));
INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                    VALUES           ('1KKA1Z300612',     '12',          'A',          TO_DATE('12-FEB-13 13:52:42','DD-MON-RR HH24:MI:SS'));
INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                    VALUES           ('1KKA1Z300612',     '12',          '5',          TO_DATE('13-FEB-13 09:00:00','DD-MON-RR HH24:MI:SS'));
INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                    VALUES           ('1KKA1Z300612',     '12',          'K',          TO_DATE('13-FEB-13 10:00:00','DD-MON-RR HH24:MI:SS'));
INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                    VALUES           ('1KKA1Z300612',     '12',          '5',          TO_DATE('13-FEB-13 11:00:00','DD-MON-RR HH24:MI:SS'));
INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                    VALUES           ('1KKA1Z300612',     '12',          'K',          TO_DATE('13-FEB-13 12:00:00','DD-MON-RR HH24:MI:SS'));
INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                    VALUES           ('1KKA1Z300612',     '12',          '5',          TO_DATE('13-FEB-13 16:00:00','DD-MON-RR HH24:MI:SS'));
INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                    VALUES           ('1KKA1Z300612',     '12',          'C',          TO_DATE('14-FEB-13 08:00:00','DD-MON-RR HH24:MI:SS'));
INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                    VALUES           ('1KKA1Z300612',     '12',          'B',          TO_DATE('14-FEB-13 10:00:00','DD-MON-RR HH24:MI:SS'));
INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                    VALUES           ('1KKA1Z300612',     '12',          'E',          TO_DATE('18-FEB-13 13:00:00','DD-MON-RR HH24:MI:SS'));
INSERT     INTO      TABLE_2      (ORDER_NR,               PRIORITY,     WO_STEP,     STEP_DATE)
                    VALUES           ('1KKA1Z300612',     '12',          'F',          TO_DATE('20-FEB-13 16:00:00','DD-MON-RR HH24:MI:SS'));
COMMIT;And here is what i expect from my query:
SYSDATE     28.Feb.13 14:00                                                                                     
ORDER_NR     PRIORITYCREATE_DATE     STATUS     STATUS_DATE     DESCRIPTION     AGE_1     AGE_2     WAITNG     STEP_A     STEP_B     STEP_C     STEP_5     STEP_K     STEP_E     STEP_F     STEP_S     STEP_R     
1KKA1T205634     12     10.Feb.13 10:00     U     28.Feb.13 12:00     CLEAN HOUSE     18,083     8,833     2,125     0,833     4,125     0,083     0,750     0,208     2,125     0,666     0,042     7,125     
1KKA1Z300612     12     08.Feb.13 14:00     F     20.Feb.13 16:00     REPAIR CAR     20,000     16,042     2,125     0,833     4,125     0,083     0,750     0,208     2,125     0,666          And now the explanation to the query result:
The AGE_1 is the difference in days between the 'CREATE_DATE' and IF EXSIST the STEP 'U' then STEP_DATE or if the STEP 'U' is not found in TABLE_2 then it should show the difference in days between the 'CREATE_DATE' and the 'SYSDATE'
The AGE_2 is the difference in days between the STEP 'A' STEP_DATE and IF EXSIST the STEP 'R' then STEP_DATE or if the STEP 'R' is not found in TABLE_2 then it should show the difference in days between the 'CREATE_DATE' and the 'SYSDATE'
The WAITING is the difference in days between CREATE_DATE and STEP 'A' STEP_DATE
The following columns show the days how long the ORDER_NR stays in these STEP, if an ORDER_NR comes into the same STEP more then one time it should be calculated together.
If the ORDER_NR skips a step it should show a zero in the specific field.
I hope my explanation is good enough, my english skills are far away from good.
Thanks all for your help.
Greets Reinhard W.

Answer 1

Hi,
i changed this query:
with t2 as (
            select  t.*,
                    lead(step_date) over(partition by order_nr order by step_date) next_step_date
              from  table_2 t
select  t1.*,
        nvl(
            max(
                case t2.wo_step
                  when 'U' then t2.step_date
                end
           sysdate
          ) - t1.create_date age_1,
        nvl(
            max(
                case t2.wo_step
                  when 'R' then t2.step_date
                end
           sysdate
          ) - t1.create_date age_2,
        sum(
            case t2.wo_step
              when 'B' then t2.next_step_date - t2.step_date
            end
           ) step_b
  from  table_1 t1,
        t2
  where t2.order_nr = t1.order_nr
  group by t1.order_nr,
           t1.priority,
           t1.create_date,
           t1.act_step,
           t1.step_date,
           t1.employee,
           t1.descriptionTo this:
with t2 as (
            select  t.*,
                    lead(step_date) over(partition by order_nr order by step_date) next_step_date
              from  table_2 t
select  t1.order_nr,
        nvl(
            max(
                case t2.wo_step
                  when 'U' then t2.step_date
                end
           sysdate
          ) - t1.create_date age_1,
        nvl(
            max(
                case t2.wo_step
                  when 'R' then t2.step_date
                end
           sysdate
          ) - t1.create_date age_2,
        sum(
            case t2.wo_step
              when 'B' then t2.next_step_date - t2.step_date
            end
           ) step_b
  from  table_1 t1,
        t2
  where t2.order_nr = t1.order_nr
  group by t1.order_nrthen i get the ORA-00979 Error.
Whats wrong?
I have another question.
How can i handle i i want to group to or more 'STEP's in one Column.
in Case of this i want that the column 'STEP_B' contains all days for STEP 'B' and STEP '5'.
I tried already with a + Operation like this:
with t2 as (
            select  t.*,
                    lead(step_date) over(partition by order_nr order by step_date) next_step_date
              from  table_2 t
select  t1.*,
        nvl(
            max(
                case t2.wo_step
                  when 'U' then t2.step_date
                end
           sysdate
          ) - t1.create_date age_1,
        nvl(
            max(
                case t2.wo_step
                  when 'R' then t2.step_date
                end
           sysdate
          ) - t1.create_date age_2,
        Round( sum(
            case t2.wo_step
              when 'B' then t2.next_step_date - t2.step_date
            end
           ) +
        sum(
            case t2.wo_step
              when '5' then t2.next_step_date - t2.step_date
            end
           ), 3 ) step_b
  from  table_1 t1,
        t2
  where t2.order_nr = t1.order_nr
  group by t1.order_nr,
           t1.priority,
           t1.create_date,
           t1.act_step,
           t1.step_date,
           t1.employee,
           t1.descriptionBut this does reply evertime a NULL.
Thank You.