How to write a query in which I want to check whether all entries from one table are present in some second table.
Eg : I want all entries form table_0 such that all entries from sub-query1 match atleast one entry from sub-query2.
Here is what I tired, but failed.
SELECT entries
FROM table_0
WHERE ALL(SELECT entries_1 FROM table_1 WHERE entries_1 = entries) IN (SELECT entries_2 FROM table_2 WHERE PLANET = 'earth');
It shows error:
syntax error at or near "ALL"
I am using postgresql 12.
Try set operstions:
WHERE NOT EXISTS ((/* subquery 2 */) EXCEPT (/* subquery 1 */))
You can try the below -
SELECT entries
FROM table_0
WHERE entries=ALL
(SELECT entries_1 FROM table_1 inner join table_2 on entries_1= entries_2 WHERE PLANET = 'earth');
Related
(P.S. I am still learning SQL and you can consider me a newbie)
I have 2 sample tables as follows:
Table 1
|Profile_ID| |Img_Path|
Table 2
|Profile_ID| |UName| |Default_Title|
My scenario is, from the 2nd table, i need to fetch all the records that contain a certain word, for which i have the following query :
Select Profile_Id,UName from
Table2 Where
Contains(Default_Title, 'Test')
ORDER BY Profile_Id
OFFSET 5 ROWS
FETCH NEXT 20 ROWS ONLY
(Note that i am setting the OFFSET due to requirements.)
Now, the scenario is, as soon as i retrieve 1 record from the 2nd table, i need to fetch the record from the 1st table based on the Profile_Id.
So, i need to return the following 2 results in one single statement :
|Profile_Id| |Img_Path|
|Profile_Id| |UName|
And i need to return the results in side-by-side columns, like :
|Profile_Id| |Img_Path| |UName|
(Note i had to merge 2 Profile_Id columns into one as they both contain same data)
I am still learning SQL and i am learning about Union, Join etc. but i am a bit confused as to which way to go.
You can use join:
select t1.*, t2.UName
from table1 t1 join
(select Profile_Id, UName
from Table2
where Contains(Default_Title, 'Test')
order by Profile_Id
offset 5 rows fetch next 20 rows only
) t2
on t2.profile_id = t1.profile_id
SELECT a.Profile_Id, a.Img_Path, b.UName
FROM table1 a INNER JOIN table2 b ON a.Profile_Id=b.Profile_Id
WHERE b.Default_Title = 'Test'
tables
Hi, I'm looking to update the last column in a blank table. Picture shows input and desired output. Trying to pick the largest date where workorder and state match.
I've tried a couple different codes:
UPDATE mytable
SET mytable.orderstartdate = MAX(table2.earliestdate)
FROM mytable as table2
WHERE (mytable.workorder = table2.workorder AND
mytable.state = table2.state)
;
"Syntax Error (missing operator) in query expression 'MAX(table2.earliestdate) FROM mytable as table2'."
UPDATE mytable
SET mytable.orderstartdate = (
SELECT max(earliestdate)
FROM mytable as table2
WHERE (mytable.workorder = table2.workorder AND
mytable.state = table2.state)
)
;
"Operation must use an updateable query"
Edit - click tables link for image.
Write PL/SQL Code.
First, select DISTINCT WorkOrder and State and capture in variables.
Now, Iterate the list and Write a query to get max date i.e. max(date) using work_order and State in where clause. Capture the
date.
Now, In the same loop write update query setting max(date) and workorder and State in where clause.
UPDATE table A
SET A.orderstartDate = (SELECT max(earliestdate)
FROM table B
WHERE A.WorkOrder = B.WorkOrder
GROUP BY WorkOrder)
not sure if access supports correlated subqueries but if it does...
and if not...
UPDATE table A
INNER JOIN (SELECT WorkOrder, max(OrderStartDate) MOSD
FROM Table B
GROUP BY WorkOrder) C
ON A.WorkOrder = C.workOrder
SET A.OrderStartDate = C.MOSD
Check database open mode, it may be locked for editing, or you may have no permission to to file.
I have a table A, where there is a column D_DATE with value in the form YYYYMMDD (I am not bothered about the date format). I also happen to have another table B, where there is a column name V_TILL. Now, I want to update the V_TILL column value of table B with the value of D_DATE column in table A which happens to have duplicates as well. Meaning, the inner query can return multiple records from where I form a query to update the table.
I currently have this query written but it throws the error:
ORA-01427: single-row subquery returns more than one row
UPDATE TAB_A t1
SET (V_TILL) = (SELECT TO_DATE(t2.D_DATE,'YYYYMMDD')
FROM B t2
WHERE t1.BR_CODE = t2.BR_CODE
AND t1.BK_CODE = t2.BK_CODE||t2.BR_CODE)
WHERE EXISTS (
SELECT 1
FROM TAB_B t2
WHERE t1.BR_CODE = t2.BR_CODE
AND t1.BK_CODE = t2.BK_CODE||t2.BR_CODE)
PS: BK_CODE IS THE CONCATENATION OF BK_CODE and BR_CODE
Kindly help me as I am stuck in this quagmire! Any help would be appreciated.
If the subquery returns many values which one do you want to use ?
If any you can use rownum <=1;
If you know that there is only one value use distinct
SET (V_TILL) = (SELECT TO_DATE(t2.D_DATE,'YYYYMMDD')
FROM B t2
WHERE t1.BR_CODE = t2.BR_CODE
AND t1.BK_CODE = t2.BK_CODE||t2.BR_CODE AND ROWNUM <=1)
or
SET (V_TILL) = (SELECT DISTINCT TO_DATE(t2.D_DATE,'YYYYMMDD')
FROM B t2
WHERE t1.BR_CODE = t2.BR_CODE
AND t1.BK_CODE = t2.BK_CODE||t2.BR_CODE)
above are workarounds. To do it right you have to analyze why you are getting more than one value. Maybe more sophisticated logic is needed to select the right value.
I got it working with this command:
MERGE INTO TAB_A A
USING TAB_B B
ON (A.BK_CODE = B.BK_CODE || B.BR_CODE
AND A.BR_CODE = B.BR_CODE AND B.BR_DISP_TYPE <> '0'
AND ((B.BK_CODE, B.BR_SUFFIX) IN (SELECT BK_CODE,
MIN(BR_SUFFIX)
FROM TAB_B
GROUP BY BK_CODE)))
As mentioned earlier by many, I was missing an extra condition and got it working, otherwise the above mentioned techniques work very well.
Thanks to all!
This seems like a simple join in amazon redshift that I have done countless times, but it gives me the following error:
'No results were returned by the query. [SQL State=02000]'
Here is the sql:
select
campaign_id as product_campaign_id,
count(*) as sends
into table_1
from customer_to_product_campaign
group by
product_campaign_id
;
select
product_campaign_id,
count(*) as opens_total
into table_2
from product_action_oc
where
product_action_type_paid = 'open'
group by
product_campaign_id
;
select
t1.product_campaign_id,
t1.sends,
t2.opens_total
into table_3
from table_1 t1
left join table_2 t2
on t1.product_campaign_id = t2.product_campaign_id
;
Additional info:
-table 1 (which is created without error) is ~ 6K rows
-table 2 (which is created without error) is ~ 10K rows
-the tables do have common product_campaign_id's, not that it should matter
thanks
This isn't an error, just a friendly Red Shift notification that there are no results being returned to the GUI. Basically, the into statement is absorbing all the results, so nothing is being returned.
Here is an example. Consider:
select *
into dum
from (select 1 as col) t;
This returns the same notification. But the data is there. Just do:
select *
from dum;
to see the one row just inserted.
(Note: I just tested this on Red Shift.)
I've got a database like this one:
I'm trying to create a query that would enable me to update the value of the status attribute inside the incident table whenever the values of all of these three attributes: tabor_vatrogasci, tabor_policija, and tabor_hitna are contained inside the izvještaj_tabora table as a value of the oznaka_tabora attribute. If, for example, the values of the tabor_vatrogasci, tabor_policija, and tabor_hitna attributes are 3, 4 and 5 respectively, the incident table should be updated if (and only if) 3, 4, and 5 are contained inside the izvještaj_tabora table.
This is what I tried, but it didn't work:
UPDATE incident SET status='Otvoren' FROM tabor,izvjestaj_tabora
WHERE (incident.tabor_policija=tabor.oznaka
OR incident.tabor_vatrogasci=tabor.oznaka
OR incident.tabor_hitna=tabor.oznaka)
AND izvjestaj_tabora.oznaka_tabora=tabor.oznaka
AND rezultat_izvjestaja='Riješen' AND
((SELECT EXISTS(SELECT DISTINCT oznaka_tabora FROM izvjestaj_tabora)
WHERE oznaka_tabora=incident.tabor_policija) OR tabor_policija=NULL) AND
((SELECT EXISTS(SELECT DISTINCT oznaka_tabora FROM izvjestaj_tabora)
WHERE oznaka_tabora=incident.tabor_vatrogasci) OR tabor_vatrogasci=NULL) AND
((SELECT EXISTS(SELECT DISTINCT oznaka_tabora FROM izvjestaj_tabora)
WHERE oznaka_tabora=incident.tabor_hitna) OR tabor_hitna=NULL);
Does anyone have any idea on how to accomplish this?
Asuming INCIDENT.OZNAKA is the key and you need all 3 to be ralated for the event to open (I am Slovenian that why I understand ;) )
UPDATE incident
SET status='Otvoren'
WHERE oznaka in (
SELECT DISTINCT i.oznaka
FROM incident i
INNER JOIN izvještaj_tabora t1 ON i.tabor_vatrogasci = t1.oznaka_tabora
INNER JOIN izvještaj_tabora t2 ON i.tabor_policija = t2.oznaka_tabora
INNER JOIN izvještaj_tabora t3 ON i.tabor_hitna = t3.oznaka_tabora
WHERE t1.rezultat_izvjestaja='Riješen' AND t2.rezultat_izvjestaja='Riješen' AND t3.rezultat_izvjestaja='Riješen'
)
According to your description the query should look something like this:
UPDATE incident i
SET status = 'Otvoren'
WHERE (tabor_policija IS NULL OR
EXISTS (
SELECT 1 FROM izvjestaj_tabora t
WHERE t.oznaka_tabora = i.tabor_policija
)
)
AND (tabor_vatrogasci IS NULL OR
EXISTS (
SELECT 1 FROM izvjestaj_tabora t
WHERE t.oznaka_tabora = i.tabor_vatrogasci
)
)
AND (tabor_hitna IS NULL OR
EXISTS (
SELECT 1 FROM izvjestaj_tabora t
WHERE t.oznaka_tabora = i.tabor_hitna
)
)
I wonder though, why the connecting table tabor is irrelevant to the operation.
Among other things you fell victim to two widespread misconceptions:
1)
tabor_policija=NULL
This expression aways results in NULL. Since NULL is considered "unknown", if you compare it to anything, the outcome is "unknown" as well. I quote the manual on Comparison Operators:
Do not write expression = NULL because NULL is not "equal to" NULL.
(The null value represents an unknown value, and it is not known
whether two unknown values are equal.)
2)
EXISTS(SELECT DISTINCT oznaka_tabora FROM ...)
In an EXISTS semi-join SELECT items are completely irrelevant. (I use SELECT 1 instead). As the term implies, only existence is checked. The expression returns TRUE or FALSE, SELECT items are ignored. It is particularly pointless to add a DISTINCT clause there.