In my DB I have 7 rows for 3 different entities, I want to mirror the contents of one entity to the other two based on an ID value. I do not know if an update statement is appropriate.
CoId DocumentType StatusId StatusDescription Default Text Progression Environment RequiredOnAssign TS DocumentFilterGroup
These are my column headers, CoId can have one of three values, 1, 2, or 3. I wish to copy the contents of 1 into 2 and 3 based on status ID. I have having trouble articulating further than this.
If I understand correctly, then a self-join is your best friend:
UPDATE t1
SET DocumentType = t1.DocumentType, StatusDescription = t1.StatusDescription, Default = t1.Default -- the same for the rest of the fields
FROM table t1
INNER JOIN table t2
ON t1.CoID in (2,3) and t2.CoID = 1
WHERE StatusID = ...
Related
My update query checks whether the column “Houses” is null in any of the rows in my source table by joining the id between the target & source table (check query one). The column Houses being null in this case indicates that the row has expired; thus, I need to expire the row id in my target table and set the expired date. The query works fine, but I was wondering if it can be improved; I'm new to SQL, so I don't know if using two joins is the best way to accomplish the result I want. My update query will later be used against millions of rows. No columns has been indexed yet.
Query:
(Query one)
Update t
set valid_date = GETDATE()
From Target T
JOIN SOURCE S ON S.ID = T.ID
LEFT JOIN SOURCE S2 ON S2.Houses = t.Houses
WHERE S2.Houses is null
Target:
ID
namn
middlename
Houses
date
1
demo
hello
2
null
2
demo2
test
4
null
3
demo3
test1
5
null
Source:
ID
namn
middlename
Houses
1
demo
hello
null
3
demo
world
null
Expected output after running update query :
ID
namn
middlename
Houses
date
1
demo
hello
2
2022-12-06
2
demo2
test
4
null
3
demo3
test1
5
2022-12-06
I would recommend exists:
update t
set valid_date = getdate()
from target t
where exists (select 1 from source s where s.id = t.id and s.houses is null)
Note that your original query does not exactly do what you want. It cannot distinguish source rows that do not exist from source rows that exist and whose houses column is null. In your example, it would update row 2, which is not what you seem to want. You would need an INNER JOIN instead of the LEFT JOIN.
With EXISTS, you want an index on source(id, houses) so the subquery can execute efficiently against target rows. This index is probably worthwhile for the the JOIN as well.
I don't see why you'd need to join on the column houses at all.
Find all rows in source that have value NULL in the column houses.
Then update all rows in target that have the IDs of the source rows.
I prefer to write these kind of complex updates using CTEs. It looks more readable to me.
WITH
CTE
AS
(
SELECT
Target.ID
,Target.Date
FROM
Source
INNER JOIN Target ON Target.ID = Source.ID
WHERE Source.Houses IS NULL
)
UPDATE CTE
SET Date = GETDATE();
To efficiently find rows in source that have value NULL in the column houses you should create an index, something like this:
CREATE INDEX IX_Houses ON Source
(
Houses
);
I assume that ID is a primary key with a clustered unique index, so ID would be included in the IX_Houses index implicitly.
I have one table named: ORDERS
this table contains OrderNumber's which belong to the same person and same address lines for that person.
However sometimes the data is inconsistent;
as example looking at the table screenshot: Orders table with bad data to fix -
you all can noticed that orderNumber 1 has a name associated to and addresses line1-2-3-4. sometimes those are all different by some character or even null.
my goal is to update all those 3 lines with one set of data that is already there and set equally all the 3 rows.
to make more clear the result expected should be like this:
enter image description here
i am currently using a MERGE statement to avoid a CURSOR (for loop )
but i am having problems to make it work
here the SQL
MERGE INTO ORDERS O USING
(SELECT
INNER.ORDERNUMBER,
INNER.NAME,
INNER.LINE1,
INNER.LINE2,
INNER.LINE3,
INNER.LINE4
FROM ORDERS INNER
) TEMP
ON( O.ORDERNUMBER = TEMP.ORDERNUMBER )
WHEN MATCHED THEN
UPDATE
SET
O.NAME = TEMP.NAME,
O.LINE1 = TEMP.LINE1,
O.LINE2 = TEMP.LINE2,
O.LINE3 = TEMP.LINE3,
O.LINE4 = TEMP.LINE4;
the biggest issues i am facing is to pick a single row out of the 3 randomly - it does not matter whihc of the data - row i pick to update the line/s
as long i make the records exaclty the same for an order number.
i also used ROWNUM =1 but it in multip[le updates will only output one row and update maybe thousand of lines with the same address and name whihch belong to an order number.
order number is the join column to use ...
kind regards
A simple correlated subquery in an update statement should work:
update orders t1
set (t1.name, t1.line1, t1.line2, t1.line3, t1.line4) =
(select t2.name, t2.line1, t2.line2, t2.line3, t2.line4
from orders t2
where t2.OrderNumber = t1.OrderNumber
and rownum < 2)
It is a little bit tricky for me so I need your help :)
I want to update the column Relevant to 0 WHERE Contract_Status_Code is 10 OR the Date_Contract_start YEAR is the same AND the Ranking_Value is lower than the other one ON all records that have the same VIN.
So I want to compare all records which have the same VIN.
Few examples to illustrate it:
I have there two records with the VIN = 123456. One of them (ID = 6847) has a higher Ranking_Value (7) than the other one (3). The YEAR is the same as well so I want to update the column relevant to 0 where the ID is 8105.
Two records with the VIN = 654321. Both of them have the same Ranking_Value but the record with the id = 11012 has the value 10 for the column Contract_Status_Code so I want to update the relevant column to 0 where the ID = 11012.
The last two records... They have the VIN = 171819. The first one (ID = 11578) has the higher Ranking_Value. But they have a different year where the contract has started. So I don't want to update both.
It is also possible that there are three or four records with the same VIN.
I hope you understand my problem. I'm from Germany so sorry for my English :)
By considering your ID column as unique or Identity column, I can suggest you the below query for your solution:
With cte
As
(Select a.Id, a.VIN From Table a
Join (Select max(Ranking_Value) ranks,VIN From Table Group By VIN, Year(Date_Contract_start)) b
on a.VIN=b.VIN And a.Ranking_Value = b.ranks)
update table
set Relevant = 0
where (Contract_Status_Code = 10) Or
ID Not In (Select id from cte)
update table1
set Relevant = 0
where Contract_Status_Code = 10
or (VIN,Year,Ranking_value) not in(
select VIN,Year,max(Ranking_Value)
from table1
group by VIN,Year
)
I have two tables, one table is linked by a foreign key to the other.
I need to create an update statement that would update table one based on a condition in table two. However, the conditions have to relate to one or more lines in table two.
Example - Table Two
Order A
line 1 = open (status column)
line 2 = closed (staus column)
When line 1 is also closed (same order number - in this case A), the condition is met so the order will then be closed (updated to closed) in the other table. Table on only has header information (no multiple lines).
I am having trouble with righting a condtion that looks at multiple lines in table two (all lines have to be closed) before the update to table one is made.
Any helpful suggestions would be appreciated.
Assuming that (1) the key name is ordernum, and (2) EVERY table1 entry has at least one entry in table2, this is a simple query that should work for you. Basically, the not exists clause is testing that there are no open lines in the second table.
update table1
set table1.status = 'closed'
where table1.status = 'open'
and not exists
(select 1
from table2
where table2.ordernum = table1.ordernum
and table2.status = 'open')
This may need tweaked further based on your business requirements.
Update based on user request: You could try this, but performance may take a hit, I've not tested it:
update table1
set table1.status = 'closed',
table1.count_lines =
(select count(1)
from table2 y
where y.ordernum = table1.ordernum
)
where table1.status = 'open'
and not exists
(select 1
from table2 z
where z.ordernum = table1.ordernum
and z.status = 'open')
Update 2: Try this from your last comment. You are wanting to update the ZORDER table with the sum of all the line item prices. So you must UPDATE ZORDER, not ZORDERLINE. The total is found by summing EXTENDED_PRICE on all ZORDERLINE rows that match the order id. There may be some additional business logic needed in the first sub-query (eg., if you need to exclude certain statuses like canceled items), but this should get you very close.
UPDATE zorder
SET zorder.status = 3,
zorder.total =
(SELECT SUM(Y.EXTENDED_PRICE)
FROM ZORDERLINE Y
WHERE Y.order_id = zorder.order_id)
WHERE zorder.status = 1
and not exists
(select 1
from zorderline z
where z.order_id = zorder.order_id
and z.status = 1)
how do I do multiple updates within same query.
Lets say I have this query
UPDATE table1
SET
Order = 1
WHERE
ID = 1234
But I want to change some more orders where IDs are 2345 and 2837 and 8399
how would I do that within same mysql query. Please notice that Order may be different than 1 for those. as order field is unique.
UPDATE table1
SET
Order = 1
WHERE
ID in (2345,2837,8399)
UPDATE table1
SET Order = 1
WHERE id IN (1234, 2345, 2837, 8399)
If you need different values of Order for each id, then you probably want to put a loop in whatever program is talking to the database.
Edited to add
I was thinking of looping in a program, but I see you want to execute the SQL interactively.
If you're trying to bundle a sequence of unpredictable numbers like this:
UPDATE table1 Order = 1 WHERE id = 1234
UPDATE table1 Order = 2 WHERE id = 2345
UPDATE table1 Order = 3 WHERE id = 2837
UPDATE table1 Order = 5 WHERE id = 8399
UPDATE table1 Order = 8 WHERE id = 8675
...then I'm not sure how you want that to be shorter. You can write a stored procedure that gets called like this:
do_table1_update "1,2,3,5,8,13", "1234,2345,2837,8399,8675,309"
Is that what you have in mind?
you can update multiple rows but you can't set the order field to different values, so all order fields (with matching ID) will have the value 1
UPDATE table1 SET Order = 1 WHERE ID IN(1234, 2345, 2837, 8399)
If you want to update the other orders with the same ID of 1, use the IN statement as others have posted. If you don't, use PDO, and a parameterized query.