Question

I am using Oracle 11G, I have below table structure

STATE_DEF table is parent table

TAX_DEF_ID  EFFECTIVE_DATE  REP_TYPE
1           9-Jan-12        R
2           15-Jan-12       W

and child table ‘TAX_DETAIL’ as below

TAX_DETAIL_ID   TAX_TYPE    DISTRIBUTION_TYPE   WH_RATE   TAX_DEF_ID
1               I           S                   0.1       1
2               I           P                   0.12      1
3               D           S                   0.2       1
4               D           P                   0.22      1
5               I           S                   0.3       2
6               I           P                   0.31      2
7               D           S                   0.4       2
8               D           P                   0.41      2

I want to create a view which will given output shown below

TAX_DEF_ID  EFFECTIVE_DATE  I_S_WH_RATE    I_P_WH_RATE  D_S_WH_RATE   D_P_WH_RATE
1           9-Jan-12        0.1            0.12         0.2           0.22
2           15-Jan-12       0.3            0.31         0.4           0.41

I had tried LISTAGG function but it would give me single column with concated columns. I am looking for the view definition which will give me rates in separate columns for a effective date.

I have been trying to get this output from couple of days. I would appretiate any help to achieve above result.

Answer 1

Try this:

SELECT
    SD.TAX_DEF_ID,
    SD.EFFECTIVE_DATE,
    SUM(CASE WHEN TAX_TYPE = 'I' AND DISTRIBUTION_TYPE = 'S' THEN WH_RATE ELSE 0 END) I_S_WH_RATE,
    SUM(CASE WHEN TAX_TYPE = 'I' AND DISTRIBUTION_TYPE = 'P' THEN WH_RATE ELSE 0 END) I_P_WH_RATE,
    SUM(CASE WHEN TAX_TYPE = 'D' AND DISTRIBUTION_TYPE = 'S' THEN WH_RATE ELSE 0 END) D_S_WH_RATE,
    SUM(CASE WHEN TAX_TYPE = 'D' AND DISTRIBUTION_TYPE = 'P' THEN WH_RATE ELSE 0 END) D_P_WH_RATE
FROM STATE_DEF SD
    LEFT JOIN TAX_DETAIL TD
        ON SD.TAX_DEF_ID = TD.TAX_DEF_ID
GROUP BY SD.TAX_DEF_ID, SD.EFFECTIVE_DATE