Join Vertical & Horizontal table in SQL Server using Pivot - sql

Question

I want to join two tables and combine into one but problem is one table is in Horizontal Format and other in Vertical format.
below is the table structure and join will be on Employeeid:
Table 1 : EmpDetail
ID | CODE | Name
-- |--------| ---
1 | 1008M | ABC
2 | 1039E | XYZ
3 | 1040E | TYS
Table 2 : EmpCustomeDetail
EmpID | FiledName | FieldValue
-- |-------- | ---
1 | FlD1 | temp1
1 | FlD2 | temp2
1 | FlD3 | temp3
2 | FlD1 | temp1
3 | FLD4 | temp6
Desired Output Required :
EmpID | Code | Name | Fld1 | Fld2 | Fld3 | Fld4
-- |---- | ------| --- | ---- |---- |----
1 | 1008M | ABC | temp1 | temp2 | temp3 | null
2 | 1039E | XYZ | temp1 | null | null | null
3 | 1040E | TYS | null | null | null | temp6
I had tried using Pivot Query but it is not giving exact output which i requried
Below is the query so far i have tried
SELECT A.*
FROM (
SELECT
e.Id,
e.code,
e.Fname,
FROM EmpDetail e
LEFT JOIN (
SELECT *
FROM (
SELECT
d.CustomeFieldName
, c.ComboValue
, d.EmployeeId
FROM EmpCustomeDetail d
) src
PIVOT (
MAX(FieldValue)
) src2
) c ON e.Id = c.EmployeeId
) A

Answer 1

Here are two statements:
The first is a simple PIVOT. You can use it, in case you know all Fieldnames (btw: there's a typo in your sample) in advance.
The second is roughly the same statement, but the column names are taken dynamically. This will work with (almost) any count and with different namings.
First a mock-up-test-scenraio
CREATE TABLE DummyEmpDetail (ID INT,CODE VARCHAR(10),Name VARCHAR(100));
INSERT INTO DummyEmpDetail VALUES
(1,'1008M','ABC')
,(2,'1039E','XYZ')
,(3,'1040E','TYS');
CREATE TABLE DummyEmpCustomeDetail (EmpID INT,FiledName VARCHAR(100),FieldValue VARCHAR(100));
INSERT INTO DummyEmpCustomeDetail VALUES
(1,'FlD1','temp1')
,(1,'FlD2','temp2')
,(1,'FlD3','temp3')
,(2,'FlD1','temp1')
,(3,'FLD4','temp6');
--The static PIVOT statement
SELECT p.EmpID
,p.Name
,p.CODE
,p.Fld1
,p.Fld2
,p.Fld3
p,Fld4
FROM
(
SELECT e.CODE,e.Name,ec.*
FROM DummyEmpDetail AS e
INNER JOIN DummyEmpCustomeDetail AS ec ON e.ID=ec.EmpID
) AS tbl
PIVOT
(
MAX(FieldValue) FOR FiledName IN(Fld1,Fld2,Fld3,Fld4)
) AS p;
--The dynamic PIVOT statement
DECLARE #colNames VARCHAR(MAX)=
(
STUFF
(
(
SELECT DISTINCT ',' + QUOTENAME(FiledName) FROM DummyEmpCustomeDetail
FOR XML PATH('')
),1,1,''
)
);
DECLARE #command VARCHAR(MAX)=
'SELECT p.EmpID
,p.Name
,p.CODE
,' + #colNames +
' FROM
(
SELECT e.CODE,e.Name,ec.*
FROM DummyEmpDetail AS e
INNER JOIN DummyEmpCustomeDetail AS ec ON e.ID=ec.EmpID
) AS tbl
PIVOT
(
MAX(FieldValue) FOR FiledName IN(' + #colnames + ')
) AS p;';
EXEC (#command);
GO
DROP TABLE DummyEmpCustomeDetail;
DROP TABLE DummyEmpDetail;
Both lead to the same result...

Answer 2

Try like below. If values of fieldname will not be static then you should use dynamic sql.
SELECT EMPID,
CODE,
NAME,
FLD1,
FLD2,
FLD3,
FLD4
FROM EmpDetail C
JOIN (SELECT A.*
FROM EmpCustomeDetail
PIVOT ( MIN([FIELDVALUE])
FOR [FILEDNAME] IN([FLD1],
[FLD3],
[FLD2],
FLD4) )A)B
ON C.ID = B.[EMPID]

Answer 3

No need for sub-queries.
select e.*,FlD1,FlD2,FlD3,FlD4
from EmpDetail e
left join EmpCustomeDetail
pivot (max(FieldValue) for FiledName in (FlD1,FlD2,FlD3,FlD4)) ecd
on ecd.EmpID = e.ID
+----+-------+------+-------+-------+-------+-------+
| ID | CODE | Name | FlD1 | FlD2 | FlD3 | FlD4 |
+----+-------+------+-------+-------+-------+-------+
| 1 | 1008M | ABC | temp1 | temp2 | temp3 | NULL |
+----+-------+------+-------+-------+-------+-------+
| 2 | 1039E | XYZ | temp1 | NULL | NULL | NULL |
+----+-------+------+-------+-------+-------+-------+
| 3 | 1040E | TYS | NULL | NULL | NULL | temp6 |
+----+-------+------+-------+-------+-------+-------+