Can this be done in MYSQL - mysql

Question

I have a Parent table called Run, that has Shifts as a child foreign key and those shifts have descriptions in their table. I need to select the Description of a child shift in a query and access the Description of that shift to compare to another shift.
here are the table descriptions:
Run
+----------------------+--------------+------+-----+-------------------+-----------------------------+
| Field | Type | Null | Key | Default | Extra |
+----------------------+--------------+------+-----+-------------------+-----------------------------+
| RunId | int(11) | NO | PRI | NULL | auto_increment |
| RunType | varchar(1) | YES | | NULL | |
| Plant | varchar(2) | NO | MUL | NULL | |
| Warehouse | varchar(20) | YES | | NULL | |
| LegacyId | int(11) | YES | | NULL | |
| RunDate | date | NO | | NULL | |
| Shift | varchar(20) | NO | | NULL | |
| NumEmployees | int(11) | YES | | NULL | |
| DryersRan | tinyint(1) | YES | | NULL | |
| HogfuelDelivered | int(11) | YES | | NULL | |
| ScheduledStart | datetime | YES | | NULL | |
| ScheduledEnd | datetime | YES | | NULL | |
| ScheduledHours | decimal(4,2) | YES | | NULL | |
| Downtime | int(11) | YES | | NULL | |
| ProductLength | varchar(10) | YES | | NULL | |
| ProductWidth | varchar(10) | YES | | NULL | |
| ProductThickness | varchar(10) | YES | | NULL | |
| Species | varchar(10) | YES | MUL | NULL | |
| NumBlocks | int(11) | YES | | NULL | |
| TestRun | tinyint(1) | YES | | NULL | |
| AveDiameter | decimal(5,2) | YES | | NULL | |
| BlockScale | int(11) | YES | | NULL | |
| LogScale | int(11) | YES | | NULL | |
| NumSpinouts | int(11) | YES | | NULL | |
| Pieces | int(11) | YES | | NULL | |
| Footage | int(11) | YES | | NULL | |
| Surface | int(11) | YES | | NULL | |
| Coreline | int(11) | YES | | NULL | |
| Dryer1 | int(11) | YES | | NULL | |
| Dryer2 | int(11) | YES | | NULL | |
| Dryer3 | int(11) | YES | | NULL | |
| Sander | int(11) | YES | | NULL | |
| Redry | int(11) | YES | | NULL | |
| GradeStamped | tinyint(1) | YES | | NULL | |
| Status | varchar(10) | YES | | NULL | |
| Notes | text | YES | | NULL | |
| InventoryTransaction | int(11) | YES | | NULL | |
| LastEdited | timestamp | NO | | CURRENT_TIMESTAMP | on update CURRENT_TIMESTAMP |
| LastEditedBy | varchar(20) | YES | | NULL | |
| LegacyRun | int(11) | YES | | NULL | |
| WorkCenter | varchar(20) | YES | MUL | NULL | |
+----------------------+--------------+------+-----+-------------------+-----------------------------+
RunItem:
+--------------+-------------+------+-----+-------------------+-----------------------------+
| Field | Type | Null | Key | Default | Extra |
+--------------+-------------+------+-----+-------------------+-----------------------------+
| ItemId | int(11) | NO | PRI | NULL | auto_increment |
| ItemType | varchar(2) | NO | | NULL | |
| Run | int(11) | YES | MUL | NULL | |
| LegacyRun | int(11) | YES | | NULL | |
| WorkCenter | varchar(20) | YES | | NULL | |
| Product | int(11) | YES | MUL | NULL | |
| DayProduced | date | YES | | NULL | |
| Source | varchar(20) | YES | | NULL | |
| SourceShift | varchar(20) | YES | | NULL | |
| PieceCount | int(11) | YES | | NULL | |
| Surface | int(11) | YES | | NULL | |
| Coreline | int(11) | YES | | NULL | |
| Footage | int(11) | YES | | NULL | |
| LastEdited | timestamp | NO | | CURRENT_TIMESTAMP | on update CURRENT_TIMESTAMP |
| LastEditedBy | varchar(20) | YES | | NULL | |
| Bundle | int(11) | YES | MUL | NULL | |
+--------------+-------------+------+-----+-------------------+-----------------------------+
This is the Query that I've tried so far and it wont let me do (i.Shift iss) how can this be done?
update RunItem i, Run r, i.Shift iss, r.Shift rs
set i.ItemId = (SELECT RunId from Run r where r.LegacyRun = i.LegacyRun and
rs.Description
= is.Description
and r.WorkCenter != i.WorkCenter;
gives this error:
ERROR 1146 (42S02): Table 'i.Shift' doesn't exist
UPDATE:
select r.RunId, i.Run, r.WorkCenter as runWork, i.WorkCenter as itemWork,
r.Footage, i.LegacyRun as itemLegacy from Run r, RunItem i where r.RunId = i.Run
and r.WorkCenter != i.WorkCenter and RunDate >= '2016-02-01' and RunDate <= '2016-02-29';
| 39550 | 39550 | P3-LAYUP | P3-SPREADER | 260818 | 21280 |
| 39553 | 39553 | P3-LAYUP | P3-SPREADER | 267421 | 21281 |
| 39566 | 39566 | P3-8FTSAWLINE | P3-SPREADER | 351547 | 21286 |
| 39569 | 39569 | P3-8FTSAWLINE | P3-SPREADER | 527049 | 21287 |
| 39605 | 39605 | P3-8FTSAWLINE | P3-SPREADER | 460826 | 21316 |
| 39605 | 39605 | P3-8FTSAWLINE | P3-SPREADER | 460826 | 21316 |
| 39605 | 39605 | P3-8FTSAWLINE | P3-SPREADER | 460826 | 21316 |
| 39608 | 39608 | P3-8FTSAWLINE | P3-SPREADER | 458272 | 21317 |
| 39625 | 39625 | P3-8FTSAWLINE | P3-SPREADER | 503324 | 21327 |
| 39628 | 39628 | P3-LAYUP | P3-SPREADER | 339615 | 21328 |
| 39628 | 39628 | P3-LAYUP | P3-SPREADER | 339615 | 21328 |
+-------+-------+---------------+-------------+---------+------------+
select RunId, WorkCenter, Shift,
LegacyRun from Run where Footage is null
and RunDate >='2016-02-01' and RunDate <='2016-02-29';
| 39552 | P3-SPREADER | P3-DAY-SPREAD | 21280 |
| 39555 | P3-SPREADER | P3-SWING-SPREAD | 21281 |
| 39568 | P3-SPREADER | P3-DAY-SPREAD | 21286 |
| 39571 | P3-SPREADER | P3-SWING-SPREAD | 21287 |
| 39607 | P3-SPREADER | P3-DAY-SPREAD | 21316 |
| 39609 | P3-SPREADER | P3-SWING-SPREAD | 21317 |
| 39626 | P3-SPREADER | P3-DAY-SPREAD | 21327 |
| 39629 | P3-SPREADER | P3-SWING-SPREAD | 21328 |
| 39647 | P3-8FTSAWLINE | P3-DAY-SL | 21339 |
| 39649 | P3-8FTSAWLINE | P3-SWING-SL | 21340 |
+-------+---------------+-----------------+-----------+
In the table above I'm selecting the runs where the RunItem WorkCenter and Run WorkCenter don't match, this tells me that under that Run
Some of the RunItems are pointing to the wrong run. The table below is the Table where Runs have a footage value of zero which means they don't have runItems pointing to them.
So what I need is when the RunItem WorkCenter and Run WorkCenter don't match grab the LegacyRun(RunId) and that Legacy RunShift, point all the RunItems where the workCenters don't match to the Run
that has the same LegacyRun(Id) and same Shift.Description and the LegacyRun.
UPDATE_2:
lets take the first from the top table
| 39550 | 39550 | P3-LAYUP | P3-SPREADER | 260818 | 21280 |
notice that the legacyRun(Id) is 21280
it just so happends that the top rows of the bottom Table also has the LegacyRun of 21280
if we select ItemId, WorkCenter from RunItem where Run = 39550(run from the top table where the runItem workcenter doesnt math the run);
we get:
+--------+-------------+
| ItemId | WorkCenter |
+--------+-------------+
| 110336 | P3-LAYUP |
| 110344 | P3-SPREADER |
+--------+-------------+
we know we have to point that runItem with the WorkCenter of spreader to First row of the bottom table that doesn't have runItems pointing to it.
so to fix this one row we do:
update RunItem set Run = 39552 where ItemId = 110344;
I could go through and manually do this but I want something that can update all rows

Answer 1

I got the Query I needed thanks to #Barmar:
UPDATE RunItem i JOIN Run r
ON r.LegacyRun = i.LegacyRun
AND r.WorkCenter = i.WorkCenter
JOIN Run rr
ON rr.RunId = i.Run
SET i.Run = r.RunId
where i.WorkCenter != rr.WorkCenter;
This is a much simpler and elegant Query once I added the JOIN ON.