I m struggling to update one column for a table with a sub query. I have a table where currently one of the values is null.
Currently I have:
UPDATE DW1_PURCHASES SET DW1_PURCHASES.TOTAL_AMT =
(
SELECT DW1_PURCHASES.QUANTITY * DW1_PRODUCTS.PRICE
FROM DW1_PURCHASES, DW1_PRODUCTS
WHERE DW1_PURCHASES.PRODUCT_ID = DW1_PRODUCTS.PRODUCT_ID
)
Although subquery returns data which I need to insert I get a error of single row subquery returns multiple rows.How do I basically shift subquery result to the table?
Thanks.
You don't have to JOINthe update table inside the sub-query. Just correlate the sub-query with update table
UPDATE DW1_PURCHASES
SET DW1_PURCHASES.TOTAL_AMT =
(
SELECT DW1_PURCHASES.QUANTITY * DW1_PRODUCTS.PRICE
FROM DW1_PRODUCTS
WHERE DW1_PURCHASES.PRODUCT_ID = DW1_PRODUCTS.PRODUCT_ID
)
Note : If your DW1_PRODUCTS table has duplicated PRODUCT_ID then even now there is a possibility to get the same error
Related
I'm updating a count column in one table with the count of corresponding rows in another table like so, which seems to work fine.
UPDATE #Circuits
SET CMLTotal = (SELECT COUNT(#UTCMLs.Drawing)
FROM #UTCMLs
WHERE #UTCMLs.DRAWING = #Circuits.DRAWING)
Now I need to include the rows from another table, #XRAYCMLs to get the total count of corresponding rows from both tables. I'm thinking UNION, but do not know how to make that happen.
How can I update my existing statement to accomplish my goal?
You might just want + and two subqueries:
Update #Circuits
SET CMLTotal = (select COUNT(u.Drawing)
from #UTCMLs u
where u.DRAWING = #Circuits.DRAWING
) +
(select COUNT(#UTCMLs.Drawing)
from #XRAYCMLs x
where x.DRAWING = #Circuits.DRAWING
);
I have the following query using PostgreSql :
SELECT SUM(table.a)
FROM table
GROUP BY table.b
HAVING SUM(table.a) > x;
And now I need to update a column in all rows affected by the precedent query.
I tried the following solution :
UPDATE table
SET c = 'value'
WHERE (SELECT SUM(table.a)
FROM table
GROUP BY table.b) > x;
but I get the following error
More than a line returned by a sub-request used as an expression
I cannot find a solution to update a column in all rows affected by a group by. If anyone can show me the way, it would be greatly appreciated.
You want to update table rows only for those rows that have table.b in the list of values of those whose sums of table.a column values exceeded your defined x
So, I believe you want to use this:
UPDATE TABLE
SET c = 'value'
WHERE b IN (SELECT b
FROM TABLE
GROUP BY table.b
HAVING SUM (table.a) > x));
I need to update a column in one table with the results from a select sub-query (and they should ultimately be different). But When I do this, I either get the exact same number for the hundreds of records, or I get the ORA-01427: single row sub-query returns more than one row query. error.
Can you please take a look and see what it is that I am overlooking? (I could just be overlooking something simple for all I know)
UPDATE WD_PRODUCT_CLASS
SET CURRENT_CASES = ( WITH STUFF_COUNT AS
(
SELECT sum(CURRENT_DETAIL.COMBINED_QTY) AS TOTAL_CASES
FROM CURRENT_DETAIL, SKU_MAJORS, WD_PRODUCT_CLASS
WHERE CURRENT_DETAIL.LOC_ID =
&PARM_LOC_ID
AND CURRENT_DETAIL.INVEN_ID = SKU_MAJORS.INVEN_ID
AND WD_PRODUCT_CLASS.CATEGORY = SKU_MAJORS.CONT_DESC
GROUP BY WD_PRODUCT_CLASS.CATEGORY
)
(
SELECT SUM(Z.TOTAL_CASES) FROM STUFF_COUNT Z
)
);
Maybe you need someting like this:
UPDATE WD_PRODUCT_CLASS wpc
SET wpc.CURRENT_CASES = (
SELECT sum(cd.COMBINED_QTY)
FROM CURRENT_DETAIL cd join SKU_MAJORS sm ON cd.INVEN_ID = sm.INVEN_ID
WHERE cd.LOC_ID = &PARM_LOC_ID
AND sm.CONT_DESC = wpc.CATEGORY
)
WHERE 1=1; -- if you don't set a condition all the rows will be updated
Your query updates the table with the same values because you're using a not correlated subquery in the SET clause. This subquery don't depends on the parent query, so it's calculated only once.
I suppose you need a correlated subquery so I changed your update + removed some extra parts.
I have one table with the following columns:
T_RESOLVED_DATE
I_HOUSEHOLD_NUMBER
I_RESOLVED_SET_NUMBER
I_STATION_CODE
I_RESOLVED_START_MIN
I_DURATION
I_PERSON_NUMBER
I_COVIEW_DEMO_ID
Initially, I_COVIEW_DEMO_ID is set to null.
Then I have another table with the following columns:
T_RESOLVED_DATE
I_HOUSEHOLD_NUMBER
I_PERSON_NUMBER
I_AGE
T_GENDER
I_COVIEW_DEMO_ID
I am trying to update I_COVIEW_DEMO_ID in the first table by using the value of I_COVIEW_DEMO_ID in the second table where the T_RESOLVED_DATE, I_HOUSEHOLD_NUMBER, and I_PERSON_NUMBER are equal in both tables. The first table may contain multiple rows with the same DATE, HOUSEHOLD_NUMBER, and PERSON_NUMBER, because the rows can vary by the rest of the columns.
I have tried to do a select and a group by which seems to get me part way there, but I am getting a "single-row subquery returns more than one row" error when I try to update the columns in the first table. This is what I've tried, along with variations of it:
UPDATE
Table1
SET
I_COVIEW_DEMO_ID =
(SELECT
b.I_COVIEW_DEMO_ID
FROM Table1 a,
Table2 b
WHERE a.I_HOUSEHOLD_NUMBER = b.I_HOUSEHOLD_NUMBER AND
a.I_PERSON_NUMBER = b.I_PERSON_NUMBER AND
a.T_RESOLVED_DATE = b.T_RESOLVED_DATE
GROUP BY b.I_COVIEW_DEMO_ID);
Any suggestions?
I was able to get it to work using this statement:
MERGE INTO table1 a
USING
(
SELECT DISTINCT
T_RESOLVED_DATE,
I_HOUSEHOLD_NUMBER,
I_PERSON_NUMBER,
I_COVIEW_DEMO_ID
FROM
table2
) b
ON
(
a.T_RESOLVED_DATE = b.T_RESOLVED_DATE
AND a.I_HOUSEHOLD_NUMBER = b.I_HOUSEHOLD_NUMBER
AND a.I_PERSON_NUMBER = b.I_PERSON_NUMBER
) WHEN MATCHED THEN
UPDATE SET
a.I_COVIEW_DEMO_ID = b.I_COVIEW_DEMO_ID;
As per our discussion on the comments this would be a simple PLSQL block to do what you need. I'm doing direct from my head without test, so you may need to fix some sintaxe mistake.
BEGIN
FOR rs IN ( SELECT I_HOUSEHOLD_NUMBER,
I_PERSON_NUMBER,
I_COVIEW_DEMO_ID,
T_RESOLVED_DATE
FROM Table2 ) LOOP
UPDATE Table1
SET I_COVIEW_DEMO_ID = rs.I_COVIEW_DEMO_ID
WHERE I_PERSON_NUMBER = rs.I_PERSON_NUMBER
AND I_HOUSEHOLD_NUMBER = rs.I_HOUSEHOLD_NUMBER
AND T_RESOLVED_DATE = rs.T_RESOLVED_DATE;
END LOOP;
--commit after all updates, if there is many rows you should consider in
--making commits by blocks. Define a count and increment it whithin the for
--after some number of updates you commit and restart the counter
COMMIT;
END;
Is there any way to do some kind of "WITH...UPDATE" action on SQL?
For example:
WITH changes AS
(...)
UPDATE table
SET id = changes.target
FROM table INNER JOIN changes ON table.id = changes.base
WHERE table.id = changes.base;
Some context information: What I'm trying to do is to generate a base/target list from a table and then use it to change values in another table (changing values equal to base into target)
Thanks!
You can use merge, with the equivalent of your with clause as the using clause, but because you're updating the field you're joining on you need to do a bit more work; this:
merge into t42
using (
select 1 as base, 10 as target
from dual
) changes
on (t42.id = changes.base)
when matched then
update set t42.id = changes.target;
.. gives error:
ORA-38104: Columns referenced in the ON Clause cannot be updated: "T42"."ID"
Of course, it depends a bit what you're doing in the CTE, but as long as you can join to your table withint that to get the rowid you can use that for the on clause instead:
merge into t42
using (
select t42.id as base, t42.id * 10 as target, t42.rowid as r_id
from t42
where id in (1, 2)
) changes
on (t42.rowid = changes.r_id)
when matched then
update set t42.id = changes.target;
If I create my t42 table with an id column and have rows with values 1, 2 and 3, this will update the first two to 10 and 20, and leave the third one alone.
SQL Fiddle demo.
It doesn't have to be rowid, it can be a real column if it uniquely identifies the row; normally that would be an id, which would normally never change (as a primary key), you just can't use it and update it at the same time.