Use of CONCAT FLOOR Statement - mysql

Question

I need to create a frequency table that displays the revenue per bin. The bin has a range of 500. The code shown below almost do the work except it is displaying a different values:
SELECT IF(rng='1 - 500','0 - 500',rng)AS Revenue,
IFNULL(B.rngcount,0)AS Count
FROM
(
SELECT '1 - 500' rng UNION
SELECT '501 - 1000' UNION
SELECT '1001 - 1500' UNION
SELECT '1501 - 2000' UNION
SELECT '2001 - 2500'
) A
LEFT JOIN (SELECT CONCAT(FLOOR((product.price * line_item.quantity)/500)*500+1,' - ',FLOOR((product.price * line_item.quantity)/500)*500+500) rng,
COUNT(1) rngcount
FROM line_item, product
GROUP BY rng) B USING (rng);

Answer 1

SELECT CONCAT(ranges.lo, ' - ', ranges.hi) Revenue,
COUNT(*) `Count`
FROM line_item
JOIN product USING (product_id)
JOIN ( SELECT 1 lo, 500 hi UNION
SELECT 501 , 1000 UNION
SELECT 1001 , 1500 UNION
SELECT 1501 , 2000 UNION
SELECT 2001 , 2500 ) ranges ON product.price * line_item.quantity BETWEEN ranges.lo AND ranges.hi
GROUP BY ranges.lo, ranges.hi;
fiddle
As I have commented - the relation between product and line_item must be specified. Common column for them is product_id - so according joining condition added.
And ranges table is used in a form from-to, this simplifies checking what range the revenie is posessed in.
is it possible to sum the Count column, and place the total.
Easily.
SELECT CONCAT(ranges.lo, ' - ', ranges.hi) Revenue,
COUNT(*) `Count`
FROM line_item
JOIN product USING (product_id)
JOIN ( SELECT 1 lo, 500 hi UNION
SELECT 501 , 1000 UNION
SELECT 1001 , 1500 UNION
SELECT 1501 , 2000 UNION
SELECT 2001 , 2500 ) ranges ON product.price * line_item.quantity BETWEEN ranges.lo AND ranges.hi
GROUP BY Revenue WITH ROLLUP;
Totals row is the last, with NULL value in Revenue column.

Answer 2

Here is the code I made to group the revenue according to week.Maybe you can still simplify this.
(sales_agent.name)AS Agent,
(sales_team.name)AS Team,
SUM(IF((WEEK(order_.date) - WEEK(DATE_SUB(order_.date, INTERVAL DAYOFMONTH(order_.date)-1 DAY)) + 1=1), product.price * line_item.quantity,0)) AS Week_1,
SUM(IF((WEEK(order_.date) - WEEK(DATE_SUB(order_.date, INTERVAL DAYOFMONTH(order_.date)-1 DAY)) + 1=2), product.price * line_item.quantity,0)) AS Week_2,
SUM(IF((WEEK(order_.date) - WEEK(DATE_SUB(order_.date, INTERVAL DAYOFMONTH(order_.date)-1 DAY)) + 1=3), product.price * line_item.quantity,0)) AS Week_3,
SUM(IF((WEEK(order_.date) - WEEK(DATE_SUB(order_.date, INTERVAL DAYOFMONTH(order_.date)-1 DAY)) + 1=4), product.price * line_item.quantity,0)) AS Week_4,
SUM(IF((WEEK(order_.date) - WEEK(DATE_SUB(order_.date, INTERVAL DAYOFMONTH(order_.date)-1 DAY)) + 1=5), product.price * line_item.quantity,0)) AS Week_5,
SUM(product.price * line_item.quantity) AS Total
FROM ((((line_item
INNER JOIN order_ ON line_item.order_id = order_.order_id)
INNER JOIN sales_agent ON order_.agent_id = sales_agent.agent_id)
INNER JOIN sales_team ON sales_agent.team_id = sales_team.team_id)
INNER JOIN product ON line_item.product_id = product.product_id)
GROUP BY sales_agent.agent_id;