I'm trying to get rid of left join fetch in one of our HQLs:
query = select r,f,c from ClassPos r, ClassFal f ,ClassCon c left join fetch c.ClassReg
where
DB contains this data satisfying above where clause:
ClassPos has 1 row, ClassFal has 2 rows, ClassCon has 1 row and ClassReg has 1 row.
We're using scrollable results to scroll through the results:
ScrollableResults results = query.scroll(ScrollMode.SCROLL_INSENSITIVE);
i =0
while(results.next())
{
i++
}
print(i);
We're expecting the resultset to have 2 rows but it's returning 1(i=1). When we run the SQL, we can clearly see 2 rows in the DB.
Now when we get rid of left join fetch, we see the result set has 2 rows:
query = select r,f,c from ClassPos r, ClassFal f ,ClassCon c
where <clause>
Tried looking up various places but can't get a reason. Can somebody explain this behaviour?
Related
I have a 12 million row SQL Server table that when I run the following query it shows approximately 11.6 million rows updated:
UPDATE [HCRIS]
SET [HCRIS].[ST_ABB] = dbo.[PRVDR_CHANGE].[state_abbreviation]
FROM [HCRIS]
INNER JOIN dbo.[PRVDR_CHANGE]
ON [HCRIS].[PRVDR_NUM] = dbo.[PRVDR_CHANGE].[PRVDR_NUM]
WHERE [HCRIS].[PRVDR_NUM] = dbo.[PRVDR_CHANGE].[PRVDR_NUM];
I have checked for nulls and non-numeric values in a numeric column but would love to pinpoint those rows that were not updated. My intent is to update all rows.
Thank you.
Use EXCEPT to find rows that won't get updated - where you select all rows in the first query and rows you would have updated in the second.
SELECT H.*
FROM [HCRIS] H
EXCEPT
SELECT H.*
FROM dbo.[HCRIS] H
INNER JOIN dbo.[PRVDR_CHANGE] C
ON H.[PRVDR_NUM] = C.[PRVDR_NUM]
WHERE H.[PRVDR_NUM] = C.[PRVDR_NUM];
I have a problem with my query where it duplicate as follow
![result query][1]
As you can see my rows multiple the number of rows by itself, as its the same id
do you know how to avoid it ?
[1]: https://i.stack.imgur.com/a4uS8.png
SELECT
distinct
tt.sourceId, tt.name,tt.date,
ts.content_plainText, ts.itemId,
ttk.content_Plaintext, ttk.ticketId
FROM ticket_tickets as tt
inner join ticket_ticketSolutions ts
on tt.sourceId = ts.itemId
inner join ticket_ticketTasks ttk
on ts.itemId = ttk.ticketId
would it be possible to do like one rows equal 3 match result ??
I have even try the groupby id but won't work ?
SELECT sc.TAAC_SHARE_CLASS_ID,
SCS.SHARE_CLASS_SID,
SCS.REPORTING_DT,
SCS.SHARE_CLASS_SNAPSHOT_SID,
SCS.DIST_UNMOD_30_DAY_YIELD_PCT,
SCS.DER_DIST_12_MO_YIELD_PCT,
SCS.DER_SEC_30_DAY_YIELD_PCT AS SCS_DER_SEC_30_DAY_YIELD_PCT,
SCS.DER_SEC_RESTATED_YIELD_PCT AS SCS_DER_SEC_RESTATED_YIELD_PCT
FROM SHARE_CLASS sc
INNER JOIN PORTFOLIO P ON (P.PORTFOLIO_SID=SC.PORTFOLIO_SID)
INNER JOIN SHARE_CLASS_SNAPSHOT SCS ON
(SCS.SHARE_CLASS_SID=sc.SHARE_CLASS_SID)
WHERE SCS.REPORTING_DT = '24-JUL-17' AND P.PORTFOLIO_ID = 638;
I ran this query and got the following output : image
Here, instead of getting separate rows for the same TAAC_SHARE_CLASS_ID, I want to merge the outputs of same TAAC_SHARE_CLASS_ID.
For example, the first row with TAAC_SHARE_CLASS_ID = 000648 should have values for all the 4 columns :
SCS.DIST_UNMOD_30_DAY_YIELD_PCT,
SCS.DER_DIST_12_MO_YIELD_PCT,
SCS.DER_SEC_30_DAY_YIELD_PCT,
SCS.DER_SEC_RESTATED_YIELD_PCT.
Hence the first row should have values for those columns as 2.96,3.2972596, 7541.085263433, 7550.
The last 4 rows of my output are not really required, as we have now merged those data into first 4 rows correspondingly.
How can I alter this query to achieve the same? Please help.
I suggest you group your results by TAAC_SHARE_CLASS_ID column, and MAX() the remaining columns, something like this:
SELECT sc.TAAC_SHARE_CLASS_ID,
max(SCS.SHARE_CLASS_SID) as SHARE_CLASS_SID,
max(SCS.REPORTING_DT) as REPORTING_DT,
max(SCS.SHARE_CLASS_SNAPSHOT_SID) as SHARE_CLASS_SNAPSHOT_SID,
max(SCS.DIST_UNMOD_30_DAY_YIELD_PCT) as DIST_UNMOD_30_DAY_YIELD_PCT,
max(SCS.DER_DIST_12_MO_YIELD_PCT) as DER_DIST_12_MO_YIELD_PCT,
max(SCS.DER_SEC_30_DAY_YIELD_PCT) AS SCS_DER_SEC_30_DAY_YIELD_PCT,
max(SCS.DER_SEC_RESTATED_YIELD_PCT) AS SCS_DER_SEC_RESTATED_YIELD_PCT
FROM SHARE_CLASS sc
INNER JOIN PORTFOLIO P ON (P.PORTFOLIO_SID=SC.PORTFOLIO_SID)
INNER JOIN SHARE_CLASS_SNAPSHOT SCS ON (SCS.SHARE_CLASS_SID=sc.SHARE_CLASS_SID)
WHERE SCS.REPORTING_DT = '24-JUL-17' AND P.PORTFOLIO_ID = 638
GROUP BY sc.TAAC_SHARE_CLASS_ID;
My title is probably not very clear, so I made a little schema to explain what I'm trying to achieve. The xxxx_uid labels are foreign keys linking two tables.
Goal: Retrieve a column from the grids table by giving a proj_uid value.
I'm not very good with SQL joins and I don't know how to build a single query that will achieve that.
Actually, I'm doing 3 queries to perform the operation:
1) This gives me a res_uid to work with:
select res_uid from results where results.proj_uid = VALUE order by res_uid asc limit 1"
2) This gives me a rec_uid to work with:
select rec_uid from receptor_results
inner join results on results.res_uid = receptor_results.res_uid
where receptor_results.res_uid = res_uid_VALUE order by rec_uid asc limit 1
3) Get the grid column I want from the grids table:
select grid_name from grids
inner join receptors on receptors.grid_uid = grids.grid_uid
where receptors.rec_uid = rec_uid_VALUE;
Is it possible to perform a single SQL that will give me the same results the 3 I'm actually doing ?
You're not limited to one JOIN in a query:
select grids.grid_name
from grids
inner join receptors
on receptors.grid_uid = grids.grid_uid
inner join receptor_results
on receptor_results.rec_uid = receptors.rec_uid
inner join results
on results.res_uid = receptor_results.res_uid
where results.proj_uid = VALUE;
select g.grid_name
from results r
join resceptor_results rr on r.res_uid = rr.res_uid
join receptors rec on rec.rec_uid = rr.rec_uid
join grids g on g.grid_uid = rec.grid_uid
where r.proj_uid = VALUE
a small note about names, typically in sql the table is named for a single item not the group. thus "result" not "results" and "receptor" not "receptors" etc. As you work with sql this will make sense and names like you have will seem strange. Also, one less character to type!
In sqlanywhere 12 I wrote the following query which returns two rows of data:
SELECT "eDatabase"."Vendor"."VEN_CompanyName", "eDatabase"."OrderingInfo"."ORD_Timestamp"
FROM "eDatabase"."OrderingInfo"
JOIN "eDatabase"."Vendor"
ON "eDatabase"."OrderingInfo"."ORD_VEN_FK" = "eDatabase"."Vendor"."VEN_PK"
WHERE ORD_INV_FK='7853' AND ORD_DefaultSupplier = 1
Which returns:
'**United Natural Foods IN','2018-02-07 15:05:15.513'
'Flora ','2018-02-07 14:40:07.491'
I would like to only return the row with the maximum timestamp in the column "ORD_Timestamp". After simply trying to select by MAX("eDatabase"."OrderingInfo"."ORD_Timestamp") I found a number of posts describing how that method doesn't work and to use a subquery to obtain the results.
I'm having difficulty creating the subquery in a way that works and with the following query I'm getting a syntax error on my last "ON":
SELECT "eDatabase"."Vendor"."VEN_CompanyName", "eDatabase"."OrderingInfo"."ORD_Timestamp"
FROM ( "eDatabase"."OrderingInfo"
JOIN
"eDatabase"."OrderingInfo"
ON "eDatabase"."Vendor"."VEN_PK" = "eDatabase"."OrderingInfo"."ORD_VEN_FK" )
INNER JOIN
(SELECT "eDatabase"."Vendor"."VEN_CompanyName", MAX("eDatabase"."OrderingInfo"."ORD_Timestamp")
FROM "eDatabase"."OrderingInfo")
ON "eDatabase"."Vendor"."VEN_PK" = "eDatabase"."OrderingInfo"."ORD_VEN_FK"
WHERE ORD_INV_FK='7853' AND ORD_DefaultSupplier = 1
Does anyone know how I can adjust this to make the query correctly select only the max ORD_Timestamp row?
try this:
SELECT TOP 1 "eDatabase"."Vendor"."VEN_CompanyName", "eDatabase"."OrderingInfo"."ORD_Timestamp"
FROM "eDatabase"."OrderingInfo"
JOIN "eDatabase"."Vendor"
ON "eDatabase"."OrderingInfo"."ORD_VEN_FK" = "eDatabase"."Vendor"."VEN_PK"
WHERE ORD_INV_FK='7853' AND ORD_DefaultSupplier = 1
order by "ORD_Timestamp" desc
this orders them biggest on to and say only hsow the top row