How to select the group header with detailed data in a SQL

Dear Sir

I wish I had a little help from you. My goal is to create a view where the data should be in the appropriate format. In this format, I want to have for each header of a group.

I have 3 tables that they ar connected to the other (representing hierarchical data where financial plan breaks in different groups).

CRM_PLAN
CRM_PLAN_ID
DATE
AMOUNT

CRM_PLAN_PE
CRM_PLAN_PE_ID
TITLE
AMOUNT
CRM_PLAN_ID (REF CRM_PLAN key. CRM_PLAN_ID)

CRM_PLAN_MONTH
CRM_PLAN_MONTH_ID
YEAR
MONTH
AMOUNT
CRM_PLAN_PE_ID (foreign key to CRM_PLAN_PE. CRM_PLAN_PE_ID)

Data looks like:

CRM_PLAN
CRM_PLAN_ID | DATE | AMOUNT
1. 01.01.2012. 500
2. 01.02.2012 | 200

CRM_PLAN_PE
CRM_PLAN_PE_ID | TITLE | AMOUNT | CRM_PLAN_ID
1. Organization 1. 100. 1
2. Organization 2. 400. 1
5: 3 organization | 200 | 2


CRM_PLAN_MONTH
CRM_PLAN_MONTH_ID | YEAR | MONTH | AMOUNT | CRM_PLAN_PE_ID
1. 2012 | 1. 60. 1
2. 2012 | 2. 40. 1
5: 2012 | 1. 350. 2
4. 2012 | 2. 50. 2
3: 2012 | 1. 200 | 3


I would like to than the view that returns data as:

MONTH | AMOUNT
Organization 1. null
1. 60
2. 40
Organization 2. null
1. 350
2. 50
3 organization | null
1. 200

The main question is hot to write a sql as source for display to insert before each group a line with the value of the title of the table CRM_PLAN_PE column. Is it still possible? Perhaps you could suggest another method.

Notice will be used in the form of oracle where will be possible to change the data - I will make the necessary arrangements by trigger INSTEAD of.

Kind regards
Igor

Published by: user5528050 on 29.11.2012 02:23

Published by: user5528050 on 29.11.2012 02:24

Published by: user5528050 on 29.11.2012 02:25

Hi, Igor,.

In this case, I think ROLLUP is a little simpeler GROUPING SETS, but you could do it anyway:

SELECT       CASE
           WHEN  GROUPING (tab2.id) = 0
           THEN  TO_CHAR (tab2.id)
           ELSE  tab1.title
       END               AS col_1
,       SUM (tab2.amount)     AS col_2
FROM       tab1
JOIN       tab2     ON  tab1.id     = tab2.tab1_id
GROUP BY  tab1.title
,            ROLLUP (tab2.id)
ORDER BY  tab1.title
,         GROUPING (tab2.id)     DESC
,            tab2.id
;

If tab2.id cannot be NULL, you can use

NVL ( TO_CHAR (tab2.id)
    , tab1.title
    )

instead of the CASE expression and simplify the ORDER BY clause to

ORDER BY  tab1.title
,            tab2.id            NULLS FIRST

Tags: Database

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