Attempting to get quantity remaining from subtraction of table from another based on matching column information
t1 (id,complete)
t2 (id,t1_id,qty,size,desc)
t3 (id,t1_id,qty,size,desc)
t4 (id,size)
t5 (id,desc)
t1 contains main "job" and if it is complete or not
t2 contains "items in"
t3 contains "items out"
t4 contains "size of item"
t5 contains "description of item"
example data:
t1 (id=300,complete=0)
t1 (id=350,complete=1)
t2 (id=1,t1_id=300,qty=20,size=1,desc=3)
t2 (id=2,t1_id=300,qty=10,size=2,desc=1)
t2 (id=3,t1_id=350,qty=10,size=2,desc=1)
t3 (id=1,t1_id=300,qty=7,size=1,desc=3)
t3 (id=2,t1_id=300,qty=9,size=2,desc=1)
t4 (id=1,size="3.5 inch")
t4 (id=2,size="4.5 inch")
t5 (id=1,desc="Drill")
t5 (id=3,desc="Flow")
expected output:
QTY: 13 3.5 inch Flow Remaining
QTY: 1 4.5 inch Drill Remaining
NOTICE that t1 id 350 is complete, and that's why it doesn't show.
$sql = "
SELECT
t1.id AS main_id,
t2.t1_id,
t2.qty,
t2.size,
t2.desc,
t3.t1_id,
t3.qty,
t3.size,
t3.desc,
t4.size,
t5.desc
SUM(t2.qty-t3.qty) AS remaining,
JOIN t2 ON t1.id=t2.t1_id
JOIN t3 ON t1.id=t3.t1_id
JOIN t4 ON t2.size=t4.id
JOIN t5 ON t2.desc=t5.id
JOIN t4 ON t3.size=t4.id
JOIN t5 ON t3.desc=t5.id
WHERE
(t1.complete != 1) AND (t2.size = t3.size) AND (t2.desc=t3.desc)
ORDER BY t4.size ASC, t5.desc ASC ";
$result = $conn->query($sql);
if ($result->num_rows > 0){
while($row = $result->fetch_assoc()){
echo "$row['remaining']";
}
}
So i changed your sql statement, because that what you posted could not work.
CREATE TABLE t1 (
id INT,
complete int
);
INSERT INTO t1 (id,complete) VALUES
(300,0),(350,1);
CREATE TABLE t2 (
id INT,
t1_id int
,qty int
,size int
,desc1 int
);
INSERT INTO t2 (id,t1_id,qty,size,desc1) VALUES
(1,300,20,1,3),
(2,300,10,2,1),
(3,350,10,2,1);
CREATE TABLE t3 (
id INT,
t1_id int
,qty int
,size int
,desc1 int
);
INSERT INTO t3 (id,t1_id,qty,size,desc1) VALUES
(1,300,7,1,3),
(2,300,9,2,1);
CREATE TABLE t4 (
id INT,
size varchar(100)
);
INSERT INTO t4 (id,size) VALUES
(1,"3.5 inch"),
(2,"4.5 inch");
CREATE TABLE t5 (
id INT,
desc1 varchar(100)
);
INSERT INTO t5 (id,desc1) VALUES
(1,"Drill"),
(3,"Flow")
The new Sql statement is
SELECT
t1.id AS main_id,
t2.t1_id,
t2.qty,
t2.size,
t2.desc1
,t3.t1_id,
t3.qty,
t3.size,
t3.desc1
,t4.size
,t5.desc1
,t2.qty-t3.qty AS remaining
FROM t1
right JOIN t2 ON t1.id=t2.t1_id
JOIN t3 ON t1.id=t3.t1_id and t2.size = t3.size
JOIN t4 ON t2.size=t4.id
JOIN t5 ON t2.desc1=t5.id
WHERE
(t1.complete != 1)
ORDER BY t4.size ASC, t5.desc1 ASC;
And the result is
main_id t1_id qty size desc1 t1_id qty size desc1 size desc1 remaining
300 300 20 1 3 300 7 1 3 3.5 inch Flow 13
300 300 10 2 1 300 9 2 1 4.5 inch Drill 1
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