I am performing this request, and I get the results I want:
UPDATE sales
SET color = (
SELECT color
FROM master
WHERE productcode = "XJ2"
)
WHERE productcode = "XJ2";
But now I use a BI transformation tool where I can enter the constant ("XJ2" here) only once.
So I have to find an SQL request that does the same, but uses "XJ2" just once.
I feel some join is what I need, but I can't find a way to make it work (shame).
The point of this request is to retrieve the color of a product from a master table, to create a fully detailed table that I will use for data mining. Using MySQL, if that matters.
UPDATE sales s
INNER JOIN master m ON (m.ProductCode = s.ProductCode)
SET color= m.color
WHERE s.productcode="XJ2"
UPDATE Sales
SET color = m.color
FROM Sales S
INNER JOIN Master M
ON M.ProductCode = S.ProductCode
WHERE S.ProductCode = 'XJ2'
Related
Using Oracle SQL Developer, I have three tables with some common data that I need to join.
Appreciate any help on this!
Please refer to https://i.stack.imgur.com/f37Jh.png for the input and desired output (table formatting doesn't work on all tables).
These tables are made up in order to anonymize them, and in reality contain other data with millions of entries, but you could think of them as representing:
Product = Main product categories in a grocery store.
Subproduct = Subcategory products to the above. Each time the table is updated, the main product category may loses or get some new suproducts assigned to it. E.g. you can see that from May to June the Pulled pork entered while the Fishsoup was thrown out.
Issues = Status of the products, for example an apple is bad if it has brown spots on it..
What I need to find is: for each P_NAME, find the latest updated set of subproducts (SP_ID and SP_NAME), and append that information with the latest updated issue status (STATUS_FLAG).
Please note that each main product category gets its set of subproducts updated at individual occasions i.e. 1234 and 5678 might be "latest updated" on different dates.
I have tried multiple queries but failed each time. I am using combos of SELECT, LEFT OUTER JOIN, JOIN, MAX and GROUP BY.
Latest attempt, which gives me the combo of the first two tables, but missing the third:
SELECT
PRODUCT.P_NAME,
SUBPRODUCT.SP_PRODUCT_ID, SUBPRODUCT.SP_NAME, SUBPRODUCT.SP_ID, SUPPRODUCT.SP_VALUE_DATE
FROM SUBPRODUCT
LEFT OUTER JOIN PRODUCT ON PRODUCT.P_ID = SUBPRODUCT.SP_PRODUCT_ID
JOIN(SELECT SP_PRODUCT_ID, MAX(SP_VALUE_DATE) AS latestdate FROM SUBPRODUCT GROUP BY SP_PRODUCT_ID) sub ON
sub.SP_PRODUCT_ID = SUBPRODUCT.SP_PRODUCT_ID AND sub.latestDate = SUBPRODUCT.SP_VALUE_DATE;
Trying to find a row with a max value is a common SQL pattern - you can do it with a join, like your example, but it's usually more clear to use a subquery or a window function.
Correlated subquery example
select
PRODUCT.P_NAME,
SUBPRODUCT.SP_PRODUCT_ID, SUBPRODUCT.SP_NAME, SUBPRODUCT.SP_ID, SUPPRODUCT.SP_VALUE_DATE,
ISSUES.STATUS_FLAG, ISSUES.STATUS_LAST_UPDATED
from PRODUCT
join SUBPRODUCT
on PRODUCT.P_ID = SUBPRODUCT.SP_PRODUCT_ID
and SUBPRODUCT.SP_VALUE_DATE = (select max(S2.SP_VALUE_DATE) as latestDate
from SUBPRODUCT S2
where S2.SP_PRODUCT_ID = SUBPRODUCT.SP_PRODUCT_ID)
join ISSUES
on ISSUES.ISSUE_ID = SUBPRODUCT.SP_ID
and ISSUES.STATUS_LAST_UPDATED = (select max(I2.STATUS_LAST_UPDATED) as latestDate
from ISSUES I2
where I2.ISSUE_ID = ISSUES.ISSUE_ID)
Window function / inline view example
select
PRODUCT.P_NAME,
S.SP_PRODUCT_ID, S.SP_NAME, S.SP_ID, S.SP_VALUE_DATE,
I.STATUS_FLAG, I.STATUS_LAST_UPDATED
from PRODUCT
join (select SUBPRODUCT.*,
max(SP_VALUE_DATE) over (partition by SP_PRODUCT_ID) as latestDate
from SUBPRODUCT) S
on PRODUCT.P_ID = S.SP_PRODUCT_ID
and S.SP_VALUE_DATE = S.latestDate
join (select ISSUES.*,
max(STATUS_LAST_UPDATED) over (partition by ISSUE_ID) as latestDate
from ISSUES) I
on I.ISSUE_ID = S.SP_ID
and I.STATUS_LAST_UPDATED = I.latestDate
This often performs a bit better, but window functions can be tricky to understand.
In the following query I am trying to get TotalQty to SUM across both the locations for item 6112040, but so far I have been unable to make this happen. I do need to keep both lines for 6112040 separate in order to capture the different location.
This query feeds into a Jasper ireport using something called Java.Groovy. Despite this, none of the PDFs printed yet have been either stylish or stained brown. Perhaps someone could address that issue as well, but this SUM issue takes priority
I know Gordon Linoff will get on in about an hour so maybe he can help.
DECLARE #receipt INT
SET #receipt = 20
SELECT
ent.WarehouseSku AS WarehouseSku,
ent.PalletId AS [ReceivedPallet],
ISNULL(inv.LocationName,'') AS [ActualLoc],
SUM(ISNULL(inv.Qty,0)) AS [LocationQty],
SUM(ISNULL(inv.Qty,0)) AS [TotalQty],
MAX(CAST(ent.ReceiptLineNumber AS INT)) AS [LineNumber],
MAX(ent.WarehouseLotReference) AS [WarehouseLot],
LEFT(SUM(ent.WeightExpected),7) AS [GrossWeight],
LEFT(SUM(inv.[Weight]),7) AS [NetWeight]
FROM WarehouseReceiptDetail AS det
INNER JOIN WarehouseReceiptDetailEntry AS ent
ON det.ReceiptNumber = ent.ReceiptNumber
AND det.FacilityName = ent.FacilityName
AND det.WarehouseName = ent.WarehouseName
AND det.ReceiptLineNumber = ent.ReceiptLineNumber
LEFT OUTER JOIN Inventory AS inv
ON inv.WarehouseName = det.WarehouseName
AND inv.FacilityName = det.FacilityName
AND inv.WarehouseSku = det.WarehouseSku
AND inv.CustomerLotReference = ent.CustomerLotReference
AND inv.LotReferenceOne = det.ReceiptNumber
AND ISNULL(ent.CaseId,'') = ISNULL(inv.CaseId,'')
WHERE
det.WarehouseName = $Warehouse
AND det.FacilityName = $Facility
AND det.ReceiptNumber = #receipt
GROUP BY
ent.PalletId
, ent.WarehouseSku
, inv.LocationName
, inv.Qty
, inv.LotReferenceOne
ORDER BY ent.WarehouseSku
The lines I need partially coalesced are 4 and 5 in the above return.
Create a second dataset with a subquery and join to that subquery - you can extrapolate from the following to apply to your situation:
First the Subquery:
SELECT
WarehouseSku,
SUM(Qty)
FROM
Inventory
GROUP BY
WarehouseSku
Now apply to your query - insert into the FROM clause:
...
LEFT JOIN (
SELECT
WarehouseSKU,
SUM(Qty)
FROM
Inventory
GROUP BY
WarehouseSKU
) AS TotalQty
ON Warehouse.WarehouseSku = TotalQty.WarehouseSku
Without seeing the actual schema DDL it is hard to know the exact cardinality, but I think this will point you in the right direction.
I'm trying to transfer the color field value from the dress table to the purchase table as I'm changing my DB's structure slightly.
Here's the query, it's simple enough but I keep getting the error.
UPDATE purchase
SET purchase.color = (SELECT dress.color
FROM dress INNER JOIN purchase
ON dress.ID = purchase.dressID);
I've also tried without JOIN and putting the condition in the WHERE clause but I get the same error.
UPDATE purchase
SET purchase.color = (SELECT dress.color
FROM dress, purchase
WHERE dress.ID = purchase.dressID);
I've also read that this error is sometimes due to the file being "read only" or other issues with permission, I've tried everything but nothing seems to work.
Edit: also tried this but I get "missing operator" error
UPDATE purchase
SET purchase.color = dress.color
FROM dress INNER JOIN purchase ON dress.ID = purchase.dressID;
I think you really want a simple, correlated subquery:
UPDATE purchase
SET color = (SELECT d.color
FROM dress as d
WHERE d.ID = purchase.dressID
);
If there might be duplicates in the subquery, try TOP 1:
UPDATE purchase
SET color = (SELECT TOP 1 d.color
FROM dress as d
WHERE d.ID = purchase.dressID
);
I found an answer thanks to the link by Ken White.
This query with the weird keyword 'DISTINCTROW' fixed the problem.
UPDATE DISTINCTROW purchase
INNER JOIN dress ON purchase.dressID = dress.ID
SET purchase.color = dress.color;
This SQL is beyond my expertise. I think it should be fairly easy for someone with experience. Here is what I have so far..
SQL is as follows:
UPDATE (Tbl_Stg_Project_Schedule_Dates
INNER JOIN Tbl_Child_ITN ON Tbl_Stg_Project_Schedule_Dates.ms_itn = Tbl_Child_ITN.ITN)
INNER JOIN Tbl_Schedule ON Tbl_Child_ITN.Id = Tbl_Schedule.ID SET Tbl_Schedule.a_construction_start = [Tbl_Stg_Project_Schedule_Dates].[ms_start_date]
WHERE (((Tbl_Stg_Project_Schedule_Dates.ms_tempt_id) In (16,17,18,19,20,21,22,23)));
I want to add one last condition to this being that I only want the minimum of [Tbl_Stg_Project_Schedule_Dates].[ms_start_date] to update the table. I've tried the obvious of wrapping the field in Min, and also tried creating a separate aggregate select statement first (to get the min value with other criteria) that I then tried to create the update query from in new query but no luck.
I believe this is valid Access/Jet SQL. The idea here is to use a subquery to look up the earliest date among all the rows in your subset. I'm not sure if ms_itn was the right column to correlate on but hopefully you get the idea:
UPDATE (Tbl_Stg_Project_Schedule_Dates
INNER JOIN Tbl_Child_ITN ON Tbl_Stg_Project_Schedule_Dates.ms_itn = Tbl_Child_ITN.ITN)
INNER JOIN Tbl_Schedule ON Tbl_Child_ITN.Id = Tbl_Schedule.ID
SET Tbl_Schedule.a_construction_start = [Tbl_Stg_Project_Schedule_Dates].[ms_start_date]
WHERE (((Tbl_Stg_Project_Schedule_Dates.ms_tempt_id) In (16,17,18,19,20,21,22,23)))
and [Tbl_Stg_Project_Schedule_Dates].[ms_start_date] = (
select min(sd.[ms_start_date])
from [Tbl_Stg_Project_Schedule_Dates] as sd
where sd.ms_itn = [Tbl_Stg_Project_Schedule_Dates].ms_itn
)
I need to use either SQL or Excel to copy the picture columns data of the other corresponding picture values for the SAME model and color when the field is NULL.
For this picture shown I need D-2 and D-4 to also say A-2.jpg instead of NULL
(It's the same A model and the color is red so copy the existing A model and red picture that's there). I need D-7 to either copy D-5 or D-6's picture value (A-4.jpg or A-5.jpg would work). So on.... If there are not particular pictures for that group (ie. model B and Black) then it can be left as NULL.
I'm trying to use group by functions and nested selects, but I am getting nowhere with this.
If you are using MS SQL Server, you can use a self join to update the table.
update r set r.picture = l.picture
from Item l
join Item r on l.model = r.model and l.color=r.color
where
l.picture is not null and
r.picture is null
Assuming your table is called "products" you might be able to do something like this:
UPDATE products p SET picture = (
SELECT picture
FROM products p2
WHERE p2.model = p.model
AND p2.color = p.model
)
WHERE p.picture IS NULL
The rules about update commands vary between different Database systems. Let us know which database you are using if the above query does not work.