reshape data in plsql [closed] - plsql

Question

Closed. This question needs details or clarity. It is not currently accepting answers.
Want to improve this question? Add details and clarify the problem by editing this post.
Closed 2 years ago.
Improve this question
I write a query which returns result like this :
but I should reshape result like below :
in fact, what I want is to track date and doc_no and qty for specific act_desc_, Can someone help me to rewrite query reshape in PL SQL? I would appreciate it if somebody can help me.

Answer 1

Since you've posted an image, i'll give you an example of how you can do it using some quick mock data, with SQL:
select ACT_DESC, MAX(EXCAVATION_QTY) as EXCAVATION_QTY, MAX(FORM_WORK_COMPLETION_QTY) as FORM_WORK_COMPLETION_QTY
from (
select QTY, ACT_DESC, TASK,
CASE WHEN TASK = 'EXCAVATION' THEN QTY ELSE NULL END as EXCAVATION_QTY,
CASE WHEN TASK = 'Form Work Completion' THEN QTY ELSE NULL END as FORM_WORK_COMPLETION_QTY
FROM
(
select 1 as QTY, 'a' as ACT_DESC, 'Excavation' as TASK
UNION ALL
select 2 as QTY, 'a' as ACT_DESC, 'Form Work Completion' as TASK
UNION ALL
select 11 as QTY, 'b' as ACT_DESC, 'Excavation' as TASK
UNION ALL
select 22 as QTY, 'b' as ACT_DESC, 'Form Work Completion' as TASK
) as t
) t1
GROUP BY ACT_DESC
It takes:
and converts it into:

Answer 2

/*
There are numerous complex queries that can be used, but here is a quick
and simple method that creates a base table first, then populates it after.
*/
--Step 1: Create empty base table with columns of the correct data type
CREATE TABLE BASE_TABLE AS
(
SELECT
ACT_DESC_,
QTY AS EXCAVATION_QTY,
APP_DATE AS EXCAVATION_APP_DATE,
DOC_NO AS EXCAVATION_DOC_NO,
QTY AS FORM_WORK_COMP_QTY,
APP_DATE AS FORM_WORK_COMP_APP_DATE,
DOC_NO AS FORM_WORK_COMP_DOC_NO,
FROM
SOURCE_TABLE --this is the original table, or the table from the first image
WHERE 0=1 --this clause condition is used to create an empty table
);
--Step 2: Insert into base table the unique ACT_DESC_ values
INSERT INTO BASE_TABLE
(
SELECT DISTINCT
ACT_DESC_
FROM
SOURCE_TABLE
);
--Using Merge statements
--Step 3: Update base table based on TASK_ = 'Excavation'
MERGE INTO BASE_TABLE TGT --Alias TGT short for TarGeT table
USING
(
SELECT * FROM SOURCE_TABLE
WHERE TASK_ = 'Excavaion'
) SRC --Alias SRC short for SouRCe table
ON ( TGT.ACT_DESC_ = SRC.ACT_DESC_ )
WHEN MATCHED THEN UPDATE
SET
TGT.EXCAVATION_QTY = SRC.QTY
TGT.EXCAVATION_APP_DATE = SRC.APP_DATE
TGT.EXCAVATION_DOC_NO = SRC.DOC_NO;
--Step 4: Update base table based on TASK_ = 'Form Work Completion'
MERGE INTO BASE_TABLE TGT --Alias TGT short for TarGeT table
USING
(
SELECT * FROM SOURCE_TABLE
WHERE TASK_ = 'Form Work Completion'
) SRC --Alias SRC short for SouRCe table
ON ( TGT.ACT_DESC_ = SRC.ACT_DESC_ )
WHEN MATCHED THEN UPDATE
SET
TGT.FORM_WORK_COMP_QTY = SRC.QTY
TGT.FORM_WORK_COMP_APP_DATE = SRC.APP_DATE
TGT.FORM_WORK_COMP_DOC_NO = SRC.DOC_NO;