Generate Unique Number Company Wise + Year Wise - sql

Question

I have one table containing columns: PurchaseOrderID, CompanyID and CreatedDate. I want a column named PONo in this table that will automatically have values from previous column like : PO/2016(Year from CreatedDate)/001(value will increment for same year and same company id).
My expected table is as below:
PurchaseOrderID CompanyID PONo CreatedDate
1 1 PO/2016/001 2016-01-31
2 1 PO/2016/002 2016-02-22
3 1 PO/2016/003 2016-05-25
4 2 PO/2016/001 2016-09-1
5 2 PO/2016/002 2016-10-11
6 2 PO/2016/003 2016-12-31
7 1 PO/2017/001 2017-01-31
8 1 PO/2017/002 2017-02-2
9 1 PO/2017/003 2017-05-20
10 2 PO/2017/001 2017-06-25
11 2 PO/2017/002 2017-07-15
12 2 PO/2017/003 2017-08-22
From This table I want to generate and update PONo like above table.
I want query to generate PONo.
When I insert new record in table then PONo generates automatically from this record.
Note: If need to add any column let me know.

Answer 1

You may looking for this
WITH CTE AS(
SELECT PurchaseOrderID,
CompanyID,
CreatedDate,
ROW_NUMBER() OVER (PARTITION BY CompanyID,YEAR(CreatedDate) ORDER BY CreatedDate) AS RN
FROM TableName
)
SELECT PurchaseOrderID,
CompanyID,
'PO/'+CAST(YEAR(CreatedDate) AS VARCHAR(5))+'/'+RIGHT('00'+CAST(RN AS VRACHAR(5),3)),
CreatedDate
FROM CTE

Answer 2

Give this a try...
IF OBJECT_ID('tempdb..#TestData', 'U') IS NOT NULL
DROP TABLE #TestData;
CREATE TABLE #TestData (
PurchaseOrderID int NOT NULL PRIMARY KEY,
CompanyID int NOT NULL,
PONo CHAR(11) NULL,
CreatedDate DATE NOT NULL
);
INSERT #TestData(PurchaseOrderID, CompanyID, CreatedDate) VALUES
(1 , 1, '2016-01-31'),
(2 , 1, '2016-02-22'),
(3 , 1, '2016-05-25'),
(4 , 2, '2016-09-01'),
(5 , 2, '2016-10-11'),
(6 , 2, '2016-12-31'),
(7 , 1, '2017-01-31'),
(8 , 1, '2017-02-02'),
(9 , 1, '2017-05-20'),
(10, 2, '2017-06-25'),
(11, 2, '2017-07-15'),
(12, 2, '2017-08-22');
-- SELECT * FROM #TestData td;
--=========================================
SELECT
*,
PONo = CONCAT('PO/', YEAR(td.CreatedDate), '/', RIGHT(CONCAT('000',
ROW_NUMBER() OVER (PARTITION BY td.CompanyID, YEAR(td.CreatedDate) ORDER BY td.PurchaseOrderID)), 3))
FROM
#TestData td;
Results...
PurchaseOrderID CompanyID PONo CreatedDate PONo
--------------- ----------- ----------- ----------- -------------------
1 1 NULL 2016-01-31 PO/2016/001
2 1 NULL 2016-02-22 PO/2016/002
3 1 NULL 2016-05-25 PO/2016/003
7 1 NULL 2017-01-31 PO/2017/001
8 1 NULL 2017-02-02 PO/2017/002
9 1 NULL 2017-05-20 PO/2017/003
4 2 NULL 2016-09-01 PO/2016/001
5 2 NULL 2016-10-11 PO/2016/002
6 2 NULL 2016-12-31 PO/2016/003
10 2 NULL 2017-06-25 PO/2017/001
11 2 NULL 2017-07-15 PO/2017/002
12 2 NULL 2017-08-22 PO/2017/003

Answer 3

If you want to generate new sequence logic.
CREATE TABLE PO_wise_seq
(
CompanyID BIGINT,
year_ INT,
seq BIGINT IDENTITY(1,1)
)
DECLARE #CompanyID BIGINT =332
DECLARE #Year_id BIGINT =2016
INSERT INTO PO_wise_seq VALUES (#CompanyID,#Year_id)
select CompanyID
,cast(#CompanyID as nvarchar) +'/' +cast(#Year_id as nvarchar)+'/'+cast(count(1) as nvarchar) as seq
FROM PO_wise_seq
WHERE CompanyID=#CompanyID
AND year_=#Year_id
GROUP BY CompanyID,year_

Answer 4

If you want to generate new sequence logic.
CREATE TABLE PO_wise_seq
(
PO BIGINT,
year_ INT,
seq BIGINT IDENTITY(1,1)
)
DECLARE #PO_ID BIGINT =332
DECLARE #Year_id BIGINT =2016
INSERT INTO PO_wise_seq VALUES (#PO_ID,#Year_id)
select PO,
cast(#PO_ID as nvarchar) +'/' +cast(#Year_id as nvarchar)+'/'+cast(count(1) as nvarchar) as seq
FROM PO_wise_seq
WHERE PO=#PO_ID
AND year_=#Year_id
GROUP BY PO,year_