Check box like functionality in table using query in SQL Server - sql

Question

I have a primary table with multiple records for the name but different quantity and colors.
TblPrimary: current table
id | name | color | Quan |
===+=========+=======+=======+
1 | Apple | Red | 10 |
2 | Banana | Yellow| 5 |
3 | Mango | Yellow| 8 |
4 | Apple | Green | 20 |
5 | Banana | Brown | 15 |
6 | Mango | Orange| 12 |
7 | Mango | Green | 5 |
This is my main table and I basically want data from the primary table like this. So basically the Quan in main table is sum of all individual Quan from the primary table. The colors (Red,Yellow,Brown) in the main table; are bits which indicate whether that color is present for the fruit or not in the primary table.
TblMain: new expected table
id | Name | Quan | Red | Yellow | Brown | Green | Orange |
===+=========+=======+=====+========+=======+=======+========+
1 | Apple | 30 | 1 | 0 | 0 | 1 | 0 |
2 | Banana | 20 | 0 | 1 | 1 | 0 | 0 |
3 | Mango | 25 | 0 | 1 | 0 | 1 | 1 |
I have got the below query and I have group by and the sum. I am not able to get the colors portion of the main table populated.
INSERT INTO TblMain(Name, Quan)
(SELECT Name, SUM(Quan)
FROM TblPrimary
GROUP BY Name)

Answer 1

You can try to use sum windows function in subquery then use condition aggregate function make your expect result.
select ROW_NUMBER() OVER(ORDER BY name) id,
name,
Quan,
SUM(CASE WHEN color = 'Red' THEN 1 ELSE 0 END) 'Red',
SUM(CASE WHEN color = 'Yellow' THEN 1 ELSE 0 END) 'Yellow',
SUM(CASE WHEN color = 'Brown' THEN 1 ELSE 0 END) 'Brown',
SUM(CASE WHEN color = 'Green' THEN 1 ELSE 0 END) 'Green',
SUM(CASE WHEN color = 'Orange' THEN 1 ELSE 0 END) 'Orange'
from (
SELECT name,
color,
SUM(Quan) OVER(PARTITION BY name ORDER BY name) Quan
FROM TblPrimary
) t1
group by name,Quan
sqlfiddle
Result
id name Quan Red Yellow Brown Green Orange
1 Apple 30 1 0 0 1 0
2 Banana 20 0 1 1 0 0
3 Mango 25 0 1 0 1 1

Answer 2

You can use PIVOT to convert values to columns. In your case this becomes a bit cumbersome, because you want the row sum as well as well as the 0/1 flags
SELECT
name,
ISNULL(Red,0) + ISNULL(Yellow,0) + ISNULL(Brown,0) + ISNULL(Green,0) + ISNULL(Orange,0) As Quan,
CASE WHEN Red IS NULL THEN 0 ELSE 1 END AS Red,
CASE WHEN Yellow IS NULL THEN 0 ELSE 1 END AS Yellow,
CASE WHEN Brown IS NULL THEN 0 ELSE 1 END AS Brown,
CASE WHEN Green IS NULL THEN 0 ELSE 1 END AS Green,
CASE WHEN Orange IS NULL THEN 0 ELSE 1 END AS Orange
FROM
(SELECT name, color, Quan
FROM dbo.TblPrimary) AS SourceTable
PIVOT
(
SUM(Quan)
FOR color IN (Red, Yellow, Brown, Green, Orange)
) AS PivotTable;
If you display the sums directly for the colors instead of the flags, the query simplifies to:
SELECT
name, Red, Yellow, Brown, Green, Orange
FROM
(SELECT name, color, Quan
FROM dbo.TblPrimary) AS SourceTable
PIVOT
(
SUM(Quan)
FOR color IN (Red, Yellow, Brown, Green, Orange)
) AS PivotTable;
And the result will be:
name Red Yellow Brown Green Orange
==========================================
Apple 10 null null 20 null
Banana null 5 15 null null
Mango null 8 null 5 12