Grouping with pivot to get count by week - sql-server

Question

I Have a table temp_customer. Schema and some data like below-
CREATE TABLE [dbo].[temp_customer](
[id] [int] IDENTITY(1,1) NOT NULL,
[company_id] [int] NOT NULL,
[created_by] [int] NULL,
[created_at] [datetime] NULL,
[code] [varchar](25) NOT NULL,
[name] [varchar](50) NULL,
)
SET IDENTITY_INSERT [dbo].[temp_customer] ON
INSERT [dbo].[temp_customer] ([id], [company_id], [created_by], [created_at], [code], [name]) VALUES (1714, 1, 1, CAST(N'2018-02-14 11:43:00.757' AS DateTime), N'STET-00001', N'Stephan Taylor')
INSERT [dbo].[temp_customer] ([id], [company_id], [created_by], [created_at], [code], [name]) VALUES (1715, 1, 1, CAST(N'2018-02-14 11:43:01.007' AS DateTime), N'TAMJ-00001', N'Tamala Jones')
INSERT [dbo].[temp_customer] ([id], [company_id], [created_by], [created_at], [code], [name]) VALUES (1716, 1, 2, CAST(N'2018-02-14 11:43:01.457' AS DateTime), N'TARB-00001', N'Taran Blauman')
INSERT [dbo].[temp_customer] ([id], [company_id], [created_by], [created_at], [code], [name]) VALUES (1718, 1, 1, CAST(N'2019-01-29 00:00:00.000' AS DateTime), N'VERD-00001', N'Veronica Dave')
INSERT [dbo].[temp_customer] ([id], [company_id], [created_by], [created_at], [code], [name]) VALUES (1719, 1, 1, CAST(N'2018-02-14 11:43:02.190' AS DateTime), N'WAYD-00001', N'Wayne Dotson')
INSERT [dbo].[temp_customer] ([id], [company_id], [created_by], [created_at], [code], [name]) VALUES (1720, 1, 2, CAST(N'2018-03-12 07:40:34.107' AS DateTime), N'LARJ-00001', N'Larry Jacobs')
INSERT [dbo].[temp_customer] ([id], [company_id], [created_by], [created_at], [code], [name]) VALUES (1721, 1, 2, CAST(N'2018-03-28 03:40:52.673' AS DateTime), N'ROBM-00002', N'Robert Matte')
INSERT [dbo].[temp_customer] ([id], [company_id], [created_by], [created_at], [code], [name]) VALUES (1722, 1, 1, CAST(N'2018-03-28 05:09:53.093' AS DateTime), N'MART-00001', N'Mark Taylor')
INSERT [dbo].[temp_customer] ([id], [company_id], [created_by], [created_at], [code], [name]) VALUES (1723, 1, 1, CAST(N'2018-03-28 05:39:19.237' AS DateTime), N'TAYT-00001', N'ALEX BRUZZI')
INSERT [dbo].[temp_customer] ([id], [company_id], [created_by], [created_at], [code], [name]) VALUES (1724, 1, 3, CAST(N'2018-04-04 04:37:29.547' AS DateTime), N'STOCK', N'STOCK')
INSERT [dbo].[temp_customer] ([id], [company_id], [created_by], [created_at], [code], [name]) VALUES (1725, 1, 3, CAST(N'2018-04-04 06:51:10.797' AS DateTime), N'AMAT-00001', N'Amanda Trezza')
INSERT [dbo].[temp_customer] ([id], [company_id], [created_by], [created_at], [code], [name]) VALUES (1726, 1, 1, CAST(N'2018-04-04 06:55:04.720' AS DateTime), N'ADRG-00001', N'Adriana Grande')
INSERT [dbo].[temp_customer] ([id], [company_id], [created_by], [created_at], [code], [name]) VALUES (1727, 1, 3, CAST(N'2018-04-05 00:00:00.000' AS DateTime), N'ISSJ-00002', N'Issac Johnes')
INSERT [dbo].[temp_customer] ([id], [company_id], [created_by], [created_at], [code], [name]) VALUES (1728, 1, 2, CAST(N'2019-01-18 00:00:00.000' AS DateTime), N'JACJ-00001', N'Jacob Jensen')
it looks like -
I would like to get output group on created_by with total_customer_created and week in which customer created as individual columns. eg in excel like -
i.e on basis of Week(starting from monday) , total customer created by 1,2,3..... etc in required date range.
Any helps appreciated in advance.

Answer 1

I have found one solution, it is working.
firstly a function to find weeks(with date range)
CREATE FUNCTION [dbo].[fGetWeeksList]
(
#StartDate DATETIME
,#EndDate DATETIME
)
RETURNS
TABLE
AS
RETURN
(
SELECT DATEADD(DAY,-(DATEPART(DW,DATEADD(WEEK, x.number, #StartDate))-2),DATEADD(WEEK, x.number, #StartDate)) as [StartDate]
,DATEADD(DAY,-(DATEPART(DW,DATEADD(WEEK, x.number + 1, #StartDate))-1) ,DATEADD(WEEK, x.number + 1, #StartDate)) AS [EndDate]
FROM master.dbo.spt_values x
WHERE x.type = 'P' AND x.number <= DATEDIFF(WEEK, #StartDate, DATEADD(WEEK,0,CAST(#EndDate AS DATE)))
)
And then use it in below query
select cast(cast(fGetWeeksList.startdate as date) as varchar(max)) + ' To '+cast(cast(fGetWeeksList.enddate as date) as varchar(max)) as week_range,
*
into #week_table from fGetWeeksList('01-01-2022','06-02-2022')
select users.user_cd ,
users.first_name ,
users.last_name,
count(customers.id) cust_count,
#week_table.week_range
into #cust_count
from users
inner join customers on
users.id = customers.created_by
inner join #week_table on
cast(customers.created_at as date) between #week_table.StartDate and #week_table.EndDate
group by
users.user_cd ,users.first_name ,users.last_name,
#week_table.week_range
DECLARE #columns NVARCHAR(MAX), #sql NVARCHAR(MAX);
SET #columns = N'';
SELECT #columns += N', ' + QUOTENAME(week_range)
FROM (SELECT distinct #week_table.week_range FROM #week_table
GROUP BY #week_table.week_range) AS x;
print #columns
SET #sql = N'SELECT user_cd,p.first_name,p.last_name, ' + STUFF(#columns, 1, 2, '') + '
FROM
(
SELECT p.week_range, p.user_cd,p.first_name,p.last_name, p.cust_count FROM dbo.#cust_count AS p
) AS j
PIVOT
(
SUM(cust_count) FOR week_range IN ('+ STUFF(REPLACE(#columns, ', p.[', ',['), 1, 1, '') + ')
) AS p;';
PRINT #sql;
EXEC sp_executesql #sql;
drop table #week_table
drop table #cust_count