Based on my earlier questions, how can I pivot data using Informatica PowerCenter Designer when I have variable amount of Addresses in my data. I would like to Pivot e.g four addresses from my data. This is the structure of the source data file:
+---------+--------------+-----------------+
| ADDR_ID | NAME | ADDRESS |
+---------+--------------+-----------------+
| 1 | John Smith | JohnsAddress1 |
| 1 | John Smith | JohnsAddress2 |
| 1 | John Smith | JohnsAddress3 |
| 2 | Adrian Smith | AdriansAddress1 |
| 2 | Adrian Smith | AdriansAddress2 |
| 3 | Ivar Smith | IvarAddress1 |
+---------+--------------+-----------------+
And this should be the resulting table:
+---------+--------------+-----------------+-----------------+---------------+----------+
| ADDR_ID | NAME | ADDRESS1 | ADDRESS2 | ADDRESS3 | ADDRESS4 |
+---------+--------------+-----------------+-----------------+---------------+----------+
| 1 | John Smith | JohnsAddress1 | JohnsAddress2 | JohnsAddress3 | NULL |
| 2 | Adrian Smith | AdriansAddress1 | AdriansAddress2 | NULL | NULL |
| 3 | Ivar Smith | IvarAddress1 | NULL | NULL | NULL |
+---------+--------------+-----------------+-----------------+---------------+----------+
I guess I can use
SOURCE --> SOURCE_QUALIFIER --> SORTER --> AGGREGATOR --> EXPRESSION --> TARGET TABLE
But what kind of port should I use in AGGREGATOR and EXPRESSION transforms?
You should use something along the lines of this:
Source->Expression->Aggregator->Target
In the expression, add a variable port:
v_count expr: IIF(ISNULL(v_COUNT) OR v_COUNT=3, 1, v_COUNT + 1)
OR
v_count expr: IIF(ADDR_ID=v_PREVIOUS_ADDR_ID, v_COUNT + 1, 1)
And 3 output ports:
o_addr1 expr: DECODE(TRUE, v_COUNT=1, ADDR_IN, NULL)
o_addr2 expr: DECODE(TRUE, v_COUNT=2, ADDR_IN, NULL)
o_addr3 expr: DECODE(TRUE, v_COUNT=3, ADDR_IN, NULL)
Then use the aggregator, group by ID and select always the Max, e.g.
agg_addr1: expr: MAX(O_ADDR1)
agg_addr2: expr: MAX(O_ADDR2)
agg_addr3: expr: MAX(O_ADDR3)
If you need more denormalized ports, add additional ports and set the initial state of the v_count variable accordingly.
Try this:
SOURCE --> SOURCE_QUALIFIER --> RANK --> AGGREGATOR -->TARGET
In RANK transformation, group by on ADDR_ID and select ADDRESS as rank port. In properties tab, select Number of ranks as 4.
In AGGREGATOR transformation group by on ADDR_ID and use the following output port expressions (RANKINDEX will be generated by RANK transformation):
ADDRESS1 = MAX(ADDRESS,RANKINDEX=1)
ADDRESS2 = MAX(ADDRESS,RANKINDEX=2)
ADDRESS3 = MAX(ADDRESS,RANKINDEX=3)
ADDRESS4 = MAX(ADDRESS,RANKINDEX=4)
来源:https://stackoverflow.com/questions/19300969/how-to-pivot-data-using-informatica-when-you-have-variable-amount-of-pivot-rows