Making a pivot table group by users - sql

Question

I want to see user statics, so I made query:
SELECT l.partner AS Partner ,
bu.meno||' '||decode(substr(bu.priezvisko, 1, 2), 'Sz',
substr(bu.priezvisko, 1, 2), 'Gy',
substr(bu.priezvisko, 1, 2), 'Ny',
substr(bu.priezvisko, 1, 2), 'Zs',
substr(bu.priezvisko, 1, 2), 'Cs',
substr(bu.priezvisko, 1, 2),
substr(bu.priezvisko, 1, 1))
||'.' AS prod_man --hungarian names have 2letter (surname)
, SUM(CASE
WHEN o.pocet!=0 THEN 1
ELSE 0
END) AS obj_pocet -- counting items
, SUM(CASE
WHEN o.pocet=0 OR o.p_del+o.p_del_dod>=o.pocet THEN 1
ELSE 0
END) AS nedod_pocet -- counting items2
, ROUND(SUM(CASE
WHEN o.pocet=0 OR o.p_del+o.p_del_dod>=o.pocet THEN 1
ELSE 0
END)/count(*), 3) * 100 AS "%" --percentage
FROM obj_odb_o o
JOIN obj_odb_l l ON o.rid_o=l.rid
JOIN sklad_karta sk ON sk.id=o.kod_id
JOIN bartex_users bu ON bu.id=sk.id.prod_man
WHERE l.partner in (325,
326)
GROUP BY l.partner
, bu.meno||' '||decode(substr(bu.priezvisko, 1, 2), 'Sz',
substr(bu.priezvisko, 1, 2), 'Gy',
substr(bu.priezvisko, 1, 2), 'Ny',
substr(bu.priezvisko, 1, 2), 'Zs',
substr(bu.priezvisko, 1, 2), 'Cs',
substr(bu.priezvisko, 1, 2),
substr(bu.priezvisko, 1, 1))
||'.'
It's working. Here is the result:
But I want to make a pivot by Months (last 6 months)...
WITH MONTHS AS
(
SELECT ADD_MONTHS(TRUNC(SYSDATE,'MONTH'),-LEVEL+1) AS MONTH,
DECODE(LEVEL,1,'Akt_mesiac','minuly_mesiac'||(LEVEL-1)) AS MONTH_NAME FROM DUAL CONNECT BY LEVEL <=7)
SELECT
partner,
prod_man,
'%',
NVL(Akt_mesiac,0) AS Akt_mesiac,
NVL(minuly_mesiac1,0) AS minuly_mesiac1,
NVL(minuly_mesiac2,0) AS minuly_mesiac2,
NVL(minuly_mesiac3,0) AS minuly_mesiac3,
NVL(minuly_mesiac4,0) AS minuly_mesiac4,
NVL(minuly_mesiac5,0) AS minuly_mesiac5,
NVL(minuly_mesiac6,0) AS minuly_mesiac6
FROM (
SELECT
-- my query - HERE I HAVE PROBLEM HERE
FROM MONTHS M
JOIN obj_odb_l l ON M.MONTH=TRUNC(l.datum_p,'MONTH')
) PIVOT
( SUM(CNT)
FOR MONTH_NAME IN
('Akt_mesiac' AS Akt_mesiac,
'minuly_mesiac1' AS minuly_mesiac1,
'minuly_mesiac2' AS minuly_mesiac2,
'minuly_mesiac3' AS minuly_mesiac3,
'minuly_mesiac4' AS minuly_mesiac4,
'minuly_mesiac5' AS minuly_mesiac5,
'minuly_mesiac6' AS minuly_mesiac6)
);
Table: obj_odb_l l ->date column -> l.datum_p -> trunc(l.datum_p,'MONTH')
How can I make a pivot table ?

Answer 1

Consider adding the month expression, TRUNC(l.datum_p,'MONTH'), into above aggregate query. Then run the query as another CTE in pivot query for JOIN in pivot's data source.
WITH MONTHS AS (
SELECT ADD_MONTHS(TRUNC(SYSDATE,'MONTH'),-LEVEL+1) AS MONTH
, DECODE(LEVEL,1,'Akt_mesiac','minuly_mesiac'||(LEVEL-1)) AS MONTH_NAME
FROM DUAL CONNECT BY LEVEL <=7
)
, AGG AS (
-- SAME AGGREGATE QUERY WITH TRUNC(l.datum_p,'MONTH') ADDED TO SELECT AND GROUP BY
-- POSSIBLY ADD WHERE CONDITION FOR LAST SIX MONTHS (IF DATA GOES BACK YEARS)
)
SELECT *
FROM (
SELECT AGG.partner
, AGG.prod_man
, AGG.obj_pocet
, AGG.nedod_pocet
, AGG.'%' AS PCT -- AVOID SPECIAL CHARS AS NAME
, M.MONTH_NAME
FROM MONTHS M
INNER JOIN AGG
ON M.MONTH = AGG.MONTH -- NEW FIELD USED FOR JOIN
)
PIVOT
( SUM(PCT) -- ONLY PIVOTS ONE NUM AT A TIME
FOR MONTH_NAME IN
('Akt_mesiac' AS Akt_mesiac,
'minuly_mesiac1' AS minuly_mesiac1,
'minuly_mesiac2' AS minuly_mesiac2,
'minuly_mesiac3' AS minuly_mesiac3,
'minuly_mesiac4' AS minuly_mesiac4,
'minuly_mesiac5' AS minuly_mesiac5,
'minuly_mesiac6' AS minuly_mesiac6)
);