Show query result differently - mysql

Question

I have this query:
SELECT pr_products.product AS PRODUCT, pr_varieties.variety AS VARIETY, pr_grades.GRADE, SUM(pf_harvest.quantity) AS QUANTITY
FROM pf_harvest
INNER JOIN pf_performance ON pf_performance.id = pf_harvest.id_performance
INNER JOIN pr_products ON pr_products.id = pf_harvest.id_product
INNER JOIN pr_varieties ON pr_varieties.id = pf_harvest.id_variety
INNER JOIN pr_grades ON pr_grades.id = pf_harvest.id_grade
WHERE pf_performance.status = 100
AND pf_harvest.id_tenant = 1
AND pf_harvest.date = '2017-03-22'
GROUP BY pf_harvest.id_product, pf_harvest.id_variety, pf_harvest.id_grade
ORDER BY pf_harvest.id_product, pr_varieties.variety, pf_harvest.id_grade;
Which shows me the following result:
-------------------------------------------------------------------
PRODUCT | VARIETY | GRADE | QUANTITY |
-------------------------------------------------------------------
ROSE | ROSEV1 | GRADE1 | 1000 |
-------------------------------------------------------------------
ROSE | ROSEV1 | GRADE2 | 5000 |
-------------------------------------------------------------------
ROSE | ROSEV2 | GRADE1 | 2000 |
-------------------------------------------------------------------
ROSE1 | ROSE1V1 | GRADE1 | 3500 |
-------------------------------------------------------------------
Is it possible to display the query result as follows?
-------------------------------------------------------------------
PRODUCT | VARIETY | GRADE1 | GRADE2 | TOTAL |
-------------------------------------------------------------------
ROSE | ROSEV1 | 1000 | 5000 | 6000 |
-------------------------------------------------------------------
ROSE | ROSEV2 | 2000 | 0 | 2000 |
-------------------------------------------------------------------
ROSE1 | ROSE1V1 | 3500 | 0 | 3500 |
-------------------------------------------------------------------
I tried to change the query but I could not and I would like to know if it is possible, I hope someone can help me.
UPDATED
NOTE: There may be more GRADES in the query result (GRADE1, GRADE2, GRADE3...).
Thanks!

Answer 1

Modify your current query by not grouping on the GRADE column, but instead pivot on that column. Then, use conditional aggregation to compute the GRADE1 and GRADE2 columns.
SELECT t3.product AS PRODUCT,
t4.variety AS VARIETY,
SUM(CASE WHEN t5.GRADE = 'GRADE1' THEN t1.quantity ELSE 0 END) AS GRADE1,
SUM(CASE WHEN t5.GRADE = 'GRADE2' THEN t1.quantity ELSE 0 END) AS GRADE2,
SUM(CASE WHEN t5.GRADE = 'GRADE3' THEN t1.quantity ELSE 0 END) AS GRADE3,
-- hopefully it is clear how to add more grades
SUM(t1.quantity) AS TOTAL
FROM pf_harvest t1
INNER JOIN pf_performance t2
ON t2.id = t1.id_performance
INNER JOIN pr_products t3
ON t3.id = pf_harvest.id_product
INNER JOIN pr_varieties t4
ON t4.id = t1.id_variety
INNER JOIN pr_grades t5
ON t5.id = t1.id_grade
WHERE t2.status = 100 AND
t1.id_tenant = 1 AND
t1.date = '2017-03-22'
GROUP BY t1.id_product,
t1.id_variety
ORDER BY t1.id_product,
t4.variety,
t1.id_grade;

Answer 2

try this
added this code
sum(case when pr_grades.Grade='Grade1' then pf_harvest.quantity else 0 end)) [Grade1],
sum(case when pr_grades.Grade='Grade2' then pf_harvest.quantity else 0 end)) [Grade2]
SELECT
pr_products.product AS PRODUCT,
pr_varieties.variety AS VARIETY,
sum(case when pr_grades.Grade='Grade1' then pf_harvest.quantity else 0 end)) [Grade1],
sum(case when pr_grades.Grade='Grade2' then pf_harvest.quantity else 0 end)) [Grade2],
SUM(pf_harvest.quantity) AS TOTAL
FROM pf_harvest
INNER JOIN pf_performance
ON pf_performance.id = pf_harvest.id_performance
INNER JOIN pr_products
ON pr_products.id = pf_harvest.id_product
INNER JOIN pr_varieties
ON pr_varieties.id = pf_harvest.id_variety
INNER JOIN pr_grades
ON pr_grades.id = pf_harvest.id_grade
WHERE pf_performance.status = 100
AND pf_harvest.id_tenant = 1
AND pf_harvest.date = '2017-03-22'
GROUP BY pf_harvest.id_product,
pf_harvest.id_variety
ORDER BY pf_harvest.id_product, pr_varieties.variety, pf_harvest.id_grade;