Mysql Running Total off one table - php

Question

I have looked up a few different answers to this question and can't seem to get the query to work properly.
Here is my table has the columns user, weekNo, salesTotalYTD.
I am currently pulling these out and grouping them by week like so:
+------+--------+---------------+
| user | weekNo | salesTotalYTD |
+------+--------+---------------+
|Jared | 1 | 200 |
+------+--------+---------------+
| Jim | 1 | 50 |
+------+--------+---------------+
|Jared | 2 | 30 |
+------+--------+---------------+
| Jim | 2 | 100 |
+------+--------+---------------+
What I am trying to do but cannot accomplish is the following:
+------+--------+---------------+
| user | weekNo | salesTotalYTD |
+------+--------+---------------+
|Jared | 1 | 200 |
+------+--------+---------------+
| Jim | 1 | 50 |
+------+--------+---------------+
|Jared | 2 | 230 |
+------+--------+---------------+
| Jim | 2 | 150 |
+------+--------+---------------+
This is the query that I have working for the first pass but every pass after that is wrong:
SET #runtot:=0
SELECT
salesTotalYTD,
user,
(#runtot := #runtot + salesTotalYTD) AS rt
FROM weeksAndSalesmantbl
GROUP BY user, weekNo
ORDER BY (CASE WHEN weekNo = 52 THEN 0 ELSE 1 END) ASC, weekNo, user ASC
Updated
Updated code courtesy of Tim but returning error:
$assignments = "
SELECT
t1.user,
t1.weekNo,
(SELECT SUM(t2.salesTotalYTD) FROM weeksAndSalesmantbl t2
WHERE t2.user = t1.user AND t2.weekNo <= t1.weekNo) AS salesTotalYTD
FROM weeksAndSalesmantbl t1
ORDER BY
t1.weekNo,
t1.user";
$salesTotalSalesManCumulative = [];
$assignmentsqry = mysqli_query($db,$assignments);
if (!$assignmentsqry) {
printf("Error: %s\n", mysqli_error($db));
exit();
}
while ($row = mysqli_fetch_array($assignmentsqry)) {
$float = floatval($row['salesTotalYTD']);
$float = round($float,2);
array_push($salesTotalSalesManCumulative,$float);
}

Answer 1

You can approach this using the standard running total query. However, in this case, we also restrict the sum to a particular user.
SELECT
t1.user,
t1.weekNo,
(SELECT SUM(t2.salesTotalYTD) FROM weeksAndSalesmantbl t2
WHERE t2.user = t1.user AND t2.weekNo <= t1.weekNo) AS salesTotalYTD
FROM weeksAndSalesmantbl t1
ORDER BY
t1.weekNo,
t1.user
Output:
Demo here:
Rextester
Update:
Since late in the game you told us that weeksAndSalesmantbl is a temporary table, and MySQL does not like the query I gave above, we can consider using a single pass over your table with session variables.
SET #rt = NULL;
SET #user = NULL;
SELECT
t.user,
t.weekNo,
t.rt AS salesTotalYTD
FROM
(
SELECT
#rt:=CASE WHEN #user=user THEN #rt+salesTotalYTD ELSE salesTotalYTD END AS rt,
#user:=user AS user,
weekNo
FROM weeksAndSalesmantbl
ORDER BY
user,
weekNo
) t
ORDER BY
t.weekNo,
t.user;
Demo
If this still gives you the error, then you might want to think about getting rid of that temporary table. Anyway, you probably would not want to be using a temporary table in production.