procedure failurecompilation - oracle

I have an existing procedure which creates a table adwstg.switchhold_notificatn_stg
Suddenly it is throwing error in creating the table. I didn't change anything the statement.
First I thought the error is with ''No'' . So find & replace '' with '
But it is throwing error at line:
nvl(ba300_z51.sent_650_01, 'No') sent_650_01,
error(27,29): PLS-00103: Encountered the symbol "NO" when expecting one of the following: * & = - + ; < / > at in is mod remainder not rem <> or != or ~= >= <= <> and or like like2 like4 likec between || multiset member submultiset***
Below is the query :
create table adwstg.switchhold_notificatn_stg nologging parallel (degree 8) compress as
select distinct
bad3700.createdon,
bad3700.uc_pod_ext,
bpc.cacont_acc,
bad3700.notificatn,
bad3700.nfcat_code,
nvl(ba300_z51.sent_650_01, ''No'') sent_650_01,
decode(ba300_z51.sent_650_01,''No'',''--'',''Yes'',to_char(ba300_z51.ucswmsgdat,''yyyymmdd''),''--'') date_sent_650_01,
nvl(to_char(ba300_z51.ucswmsgtim,''hh24:mi:ss''),''--'') time_sent_650_01,
nvl(ba300_z52.received_650_02, ''No'') received_650_02,
decode(ba300_z52.received_650_02,''No'',''--'',''Yes'',to_char(ba300_z52.ucswmsgdat,''yyyymmdd''),''--'') date_received_650_02,
nvl(to_char(ba300_z52.ucswmsgtim,''hh24:mi:ss''),''--'') time_received_650_02,
nvl(ba300_z20.received_814_20, ''No'') received_814_20,
decode(ba300_z20.received_814_20,''No'',''--'',''Yes'',to_char(ba300_z20.ucswmsgdat,''yyyymmdd''),''--'') date_received_814_20,
nvl(to_char(ba300_z20.ucswmsgtim,''hh24:mi:ss''),''--'') time_received_814_20,
case
when trim(bad3700.nfcat_code) = ''SH01'' and zet.ext_ui is not null then ''ADDED''
when trim(bad3700.nfcat_code) = ''SH01'' and zet.ext_ui is null then ''NOT PROCESSED''
when trim(bad3700.nfcat_code) in (''SH02'',''SH03'') and zet.ext_ui is null then ''REMOVED''
when trim(bad3700.nfcat_code) in (''SH02'',''SH03'') and zet.ext_ui is not null then ''NOT PROCESSED''
else ''NOT PROCESSED''
end work_order_check
from
(select distinct *
from
(select
trunc(createdon) createdon,
trim(notificatn) notificatn,
trim(uc_pod_ext) uc_pod_ext,
trim(not_type) not_type,
trim(nfcat_code) nfcat_code,
row_number () over (partition by trim(uc_pod_ext),trunc(createdon) order by trim(notificatn) desc) rnum
from birpt.bic_azfc_ds3700
where upper(trim(not_type)) = ''SH''
and trim(bic_zdiscstat) = ''E0010'')
where rnum = 1
) bad3700
left outer join
(
select distinct ucinstalla, uc_pod_ext, datefrom, dateto
from birpt.bi0_qucinstalla
where objvers = ''A''
) bqi
on (trim(bad3700.uc_pod_ext) = trim(bqi.uc_pod_ext)
and trunc(bad3700.createdon) between bqi.datefrom and bqi.dateto)
left outer join
(
select distinct cacont_acc, ucinstalla, ucmovein_d, ucmoveoutd
from birpt.bi0_puccontract
where objvers = ''A''
) bpc
on (trim(bqi.ucinstalla) = trim(bpc.ucinstalla)
and trunc(bad3700.createdon) between bpc.ucmovein_d and bpc.ucmoveoutd)
left outer join
(select distinct *
from
(select
trim(ucswtpodex) ucswtpodex,
trunc(ucswmsgdat) ucswmsgdat,
ucswmsgtim,
case --650_01 CHECK
when trim(uc_mdcat) = ''Z51'' then ''Yes''
else ''No''
end sent_650_01,
row_number () over (partition by trim(ucswtpodex), trunc(ucswmsgdat) order by trunc(ucswmsgdat) desc, ucswmsgtim desc) rnum
from birpt.bic_azudeds0300
where trim(uc_mdcat) = ''Z51'')
where rnum = 1) ba300_z51
on (trim(bad3700.uc_pod_ext) = trim(ba300_z51.ucswtpodex)
and trunc(bad3700.createdon)= trunc(ba300_z51.ucswmsgdat))
left outer join
(select distinct *
from
(select
trim(ucswtpodex) ucswtpodex,
trunc(ucswmsgdat) ucswmsgdat,
ucswmsgtim,
case --650_02 CHECK
when trim(uc_mdcat) = ''Z52'' then ''Yes''
else ''No''
end received_650_02,
row_number () over (partition by trim(ucswtpodex), trunc(ucswmsgdat) order by trunc(ucswmsgdat) desc, ucswmsgtim desc) rnum
from birpt.bic_azudeds0300
where trim(uc_mdcat) = ''Z52'')
where rnum = 1) ba300_z52
on (trim(bad3700.uc_pod_ext) = trim(ba300_z52.ucswtpodex)
and trunc(bad3700.createdon)= trunc(ba300_z52.ucswmsgdat))
left outer join
(select distinct *
from
(select
trim(ucswtpodex) ucswtpodex,
trunc(ucswmsgdat) ucswmsgdat,
ucswmsgtim,
case --814_20 CHECK
when trim(uc_mdcat) = ''Z20'' then ''Yes''
else ''No''
end received_814_20,
row_number () over (partition by trim(ucswtpodex), trunc(ucswmsgdat) order by trunc(ucswmsgdat) desc, ucswmsgtim desc) rnum
from birpt.bic_azudeds0300
where trim(uc_mdcat) = ''Z20'')
where rnum = 1) ba300_z20
on (trim(bad3700.uc_pod_ext) = trim(ba300_z20.ucswtpodex)
and trunc(bad3700.createdon)= trunc(ba300_z20.ucswmsgdat))
left outer join
(select distinct ext_ui
from isurpt.zcs_esiid_tamper
) zet
on (trim(bad3700.uc_pod_ext) = trim(zet.ext_ui));

If you remove all doubled single quotes (perform replace function in any text editor), your code will be valid (as far as syntax is concerned).
I don't have your tables to test it, and there are too many of them with too many columns to create a test case by myself.
The question is: why did you double them in the first place?

Related

Pl / SQL Oracle helps to run a Date in Subquery

How could I get the date of the Maximum Value, by means of a subquery
I can't put the Date in the Main query because I would have to add it to the group by it would bring me a lot of data
Here is the Code:
SELECT MAX (A1.VALOR) AS VALOR,
(SELECT sq1.FECHA
FROM VARIABLE_VALORES_SMEC sq1
WHERE sq1.ID_AGENTE = A1.ID_AGENTE)
MES, -- {<-- Here is the Problem}
(SELECT CODIGO_AGENTE
FROM AGENTES
WHERE ID_AGENTE = A1.ID_AGENTE)
Agentess,
(SELECT NOMBRE_AGENTE
FROM AGENTES
WHERE ID_AGENTE = A1.ID_AGENTE)
Nombre_Agente
FROM VARIABLE_VALORES_SMEC A1
WHERE A1.VALOR < '1'
AND A1.VALOR != '0'
AND A1.ID_AGENTE IN (SELECT C1.ID_AGENTE
FROM VARIABLE_VALORES_SMEC C1
WHERE A1.FECHA = C1.FECHA)
AND A1.ID_AGENTE IN (SELECT B1.ID_AGENTE
FROM AGENTES B1
WHERE ID_CATEGORIA_AGENTE = 'AC006')
AND (A1.FECHA BETWEEN (ADD_MONTHS (TO_DATE ( :FECHAIN, 'MM/DD/YYYY'),
-1))
AND (LAST_DAY (
ADD_MONTHS (
TO_DATE ( :FECHAIN, 'MM/DD/YYYY'),
-1))))
AND A1.ID_VARIABLE LIKE '%_calc_total_pot#%'
GROUP BY ID_AGENTE
Am I correct that you need (fecha) for maximum A1.VALOR?
If - yes, you can use the following query, or if - no, just replace A1.VALOR with the required column in keep() clause:
SELECT MAX (A1.VALOR) AS VALOR,
max(A1.FECHA)keep(dense_rank first order by A1.VALOR desc) MES, -- A1.VALOR is used here as sort key, replace it with what you want
(SELECT CODIGO_AGENTE
FROM AGENTES
WHERE ID_AGENTE = A1.ID_AGENTE)
Agentess,
(SELECT NOMBRE_AGENTE
FROM AGENTES
WHERE ID_AGENTE = A1.ID_AGENTE)
Nombre_Agente
FROM VARIABLE_VALORES_SMEC A1
WHERE A1.VALOR < '1'
AND A1.VALOR != '0'
AND A1.ID_AGENTE IN (SELECT C1.ID_AGENTE
FROM VARIABLE_VALORES_SMEC C1
WHERE A1.FECHA = C1.FECHA)
AND A1.ID_AGENTE IN (SELECT B1.ID_AGENTE
FROM AGENTES B1
WHERE ID_CATEGORIA_AGENTE = 'AC006')
AND (A1.FECHA BETWEEN (ADD_MONTHS (TO_DATE ( :FECHAIN, 'MM/DD/YYYY'),
-1))
AND (LAST_DAY (
ADD_MONTHS (
TO_DATE ( :FECHAIN, 'MM/DD/YYYY'),
-1))))
AND A1.ID_VARIABLE LIKE '%_calc_total_pot#%'
GROUP BY ID_AGENTE
You can use row_number analytical function to fetch one record for which value is highest and use the fecha of that record. Use following sub query:
(Select fecha from
(SELECT sq1.FECHA, row_number() over (order by sq1.value desc nulls last) as rn
FROM VARIABLE_VALORES_SMEC sq1
WHERE sq1.ID_AGENTE = A1.ID_AGENTE)
Where rn = 1) MES

Adding filters in subquery from CTE quadruples run time

I am working on an existing query for SSRS report that focuses on aggregated financial aid data split out into 10 aggregations. User wants to be able to select students included in that aggregated data based on new vs. returning and 'selected for verification.' For the new/returning status, I added a CTE to return the earliest admit date for a student. 2 of the 10 data fields are created by a subquery. I have been trying for 3 days to get the subquery to use the CTE fields for a filter, but they won't work. Either they're ignored or I get a 'not a group by expression' error. If I put the join to the CTE within the subquery, the query time jumps from 45 second to 400 seconds. This shouldn't be that complicated! What am I missing? I have added some of the code... 3 of the chunks work - paid_something doesn't.
with stuStatus as
(select
person_uid, min(year_admitted) admit_year
from academic_study
where aid_year between :AidYearStartParameter and :AidYearEndParameter
group by person_uid)
--- above code added to get student information not originally in qry
select
finaid_applicant_status.aid_year
, count(1) as fafsa_cnt --works
, sum( --works
case
when (
package_complete_date is not null
and admit.status is not null
)
then 1
else 0
end
) as admit_and_package
, (select count(*) --does't work
from (
select distinct award_by_aid_year.person_uid
from
award_by_aid_year
where
award_by_aid_year.aid_year = finaid_applicant_status.aid_year
and award_by_aid_year.total_paid_amount > 0 )dta
where
(
(:StudentStatusParameter = 'N' and stuStatus.admit_year = finaid_applicant_status.aid_year)
OR
(:StudentStatusParameter = 'R' and stuStatus.admit_year <> finaid_applicant_status.aid_year)
OR :StudentStatusParameter = '%'
)
)
as paid_something
, sum( --works
case
when exists (
select
1
from
award_by_person abp
where
abp.person_uid = fafsa.person_uid
and abp.aid_year = fafsa.aid_year
and abp.award_paid_amount > 0
) and fafsa.requirement is not null
then 1
else 0
end
) as paid_something_fafsa
from
finaid_applicant_status
join finaid_tracking_requirement fafsa
on finaid_applicant_status.person_uid = fafsa.person_uid
and finaid_applicant_status.aid_year = fafsa.aid_year
and fafsa.requirement = 'FAFSA'
left join finaid_tracking_requirement admit
on finaid_applicant_status.person_uid = admit.person_uid
and finaid_applicant_status.aid_year = admit.aid_year
and admit.requirement = 'ADMIT'
and admit.status in ('M', 'P')
left outer join stuStatus
on finaid_applicant_status.person_uid = stuStatus.person_uid
where
finaid_applicant_status.aid_year between :AidYearStartParameter and :AidYearEndParameter
and (
(:VerifiedParameter = '%') OR
(:VerifiedParameter <> '%' AND finaid_applicant_status.verification_required_ind = :VerifiedParameter)
)
and
(
(:StudentStatusParameter = 'N' and (stuStatus.admit_year IS NULL OR stuStatus.admit_year = finaid_applicant_status.aid_year ))
OR
(:StudentStatusParameter = 'R' and stuStatus.admit_year <> finaid_applicant_status.aid_year)
OR :StudentStatusParameter = '%'
)
group by
finaid_applicant_status.aid_year
order by
finaid_applicant_status.aid_year
Not sure if this helps, but you have something like this:
select aid_year, count(1) c1,
(select count(1)
from (select distinct person_uid
from award_by_aid_year a
where a.aid_year = fas.aid_year))
from finaid_applicant_status fas
group by aid_year;
This query throws ORA-00904 FAS.AID_YEAR invalid identifier. It is because fas.aid_year is nested too deep in subquery.
If you are able to modify your subquery from select count(1) from (select distinct sth from ... where year = fas.year) to select count(distinct sth) from ... where year = fas.year then it has the chance to work.
select aid_year, count(1) c1,
(select count(distinct person_uid)
from award_by_aid_year a
where a.aid_year = fas.aid_year) c2
from finaid_applicant_status fas
group by aid_year
Here is simplified demo showing non-working and working queries. Of course your query is much more complicated, but this is something what you could check.
Also maybe you can use dbfiddle or sqlfiddle to set up some test case? Or show us sample (anonimized) data and required output for them?

Exists query with not equal running extremly slow

I am trying to modify a query that someone else wrote which is taking a really long time to run. The problem has to do with the <> portion of the exists query. Any idea how this can be changed to run quicker?
SELECT m.level4 center, cc.description, m.employeename, m.empno,
TO_DATE (ct.tsdate, 'dd-mon-yyyy') tsdate, ct.starttime, ct.endtime,
ct.DURATION,
NVL (DECODE (ct.paycode, ' ', 'REG', ct.paycode), 'REG') paycode,
ct.titlecode, ct.costcenter, m.tsgroup
FROM clairvia_text ct, MASTER m, costcenteroutbound cc
WHERE ct.recordtype = '1'
AND ct.empno = m.empno
AND m.level4 = cc.center
AND EXISTS (
SELECT ct1.recordtype,ct1.empno,ct1.tsdate,ct1.processdate
FROM clairvia_text ct1
WHERE ct.recordtype = ct1.recordtype
AND ct.empno = ct1.empno
AND ct.tsdate = ct1.tsdate
AND ct.processdate = ct1.processdate
group by ct1.recordtype,ct1.empno,ct1.tsdate,ct1.processdate
having count(*) < 2)
Oracle can be finnicky with exists statements and subqueries. A couple of things to try:
Change the exists to an "in"
Change the exists to a group by statement with a "having count(1) > 1". This could even be changed into a join.
I'm assuming indexes are not an issue.
You can use analytic function count here to eliminate duplicated rows.
select * from (
SELECT m.level4 center, cc.description, m.employeename, m.empno,
TO_DATE (ct.tsdate, 'dd-mon-yyyy') tsdate, ct.starttime, ct.endtime,
ct.DURATION,
NVL (DECODE (ct.paycode, ' ', 'REG', ct.paycode), 'REG') paycode,
ct.titlecode, ct.costcenter, m.tsgroup,
count(1) over (partition by ct.recordtype,ct.empno,ct.tsdate,ct.processdate
order by null) cnt
FROM clairvia_text ct, MASTER m, costcenteroutbound cc
WHERE ct.recordtype = '1'
AND ct.empno = m.empno
AND m.level4 = cc.center
) where cnt=1
I do not have your structures and data, so I run similar queries with all_tab_cols and first query took ~500s on my laptop and second query ~2s.
-- slow test
select count(1)
from all_tab_cols atc
where exists (
select 1
from all_tab_cols atc1
where atc1.column_name = atc.column_name
group by column_name
having count(1) = 1)
-- fast test
select count(1)
from (
select column_name,
count(1) over (partition by atc.column_name order by null) cnt
from all_tab_cols atc
)
where cnt = 1

CROSS APPLY too slow for running total - TSQL

Please see my code below as it is running too slowly with the CROSS APPLY.
How can I remove the CROSS APPLY and add something else that will run faster?
Please note I am using SQL Server 2008 R2.
;WITH MyCTE AS
(
SELECT
R.NetWinCURRENCYValue AS NetWin
,dD.[Date] AS TheDay
FROM
dimPlayer AS P
JOIN
dbo.factRevenue AS R ON P.playerKey = R.playerKey
JOIN
dbo.vw_Date AS dD ON Dd.dateKey = R.dateKey
WHERE
P.CustomerID = 12345)
SELECT
A.TheDay AS [Date]
,ISNULL(A.NetWin, 0) AS NetWin
,rt.runningTotal AS CumulativeNetWin
FROM MyCTE AS A
CROSS APPLY (SELECT SUM(NetWin) AS runningTotal
FROM MyCTE WHERE TheDay <= A.TheDay) AS rt
ORDER BY A.TheDay
CREATE TABLE #temp (NetWin money, TheDay datetime)
insert into #temp
SELECT
R.NetWinCURRENCYValue AS NetWin
,dD.[Date] AS TheDay
FROM
dimPlayer AS P
JOIN
dbo.factRevenue AS R ON P.playerKey = R.playerKey
JOIN
dbo.vw_Date AS dD ON Dd.dateKey = R.dateKey
WHERE
P.CustomerID = 12345;
SELECT
A.TheDay AS [Date]
,ISNULL(A.NetWin, 0) AS NetWin
,SUM(B.NetWin) AS CumulativeNetWin
FROM #temp AS A
JOIN #temp AS B
ON A.TheDay >= B.TheDay
GROUP BY A.TheDay, ISNULL(A.NetWin, 0);
Here https://stackoverflow.com/a/13744550/613130 it's suggested to use recursive CTE.
;WITH MyCTE AS
(
SELECT
R.NetWinCURRENCYValue AS NetWin
,dD.[Date] AS TheDay
,ROW_NUMBER() OVER (ORDER BY dD.[Date]) AS RN
FROM dimPlayer AS P
JOIN dbo.factRevenue AS R ON P.playerKey = R.playerKey
JOIN dbo.vw_Date AS dD ON Dd.dateKey = R.dateKey
WHERE P.CustomerID = 12345
)
, MyCTERec AS
(
SELECT C.TheDay AS [Date]
,ISNULL(C.NetWin, 0) AS NetWin
,ISNULL(C.NetWin, 0) AS CumulativeNetWin
,C.RN
FROM MyCTE AS C
WHERE C.RN = 1
UNION ALL
SELECT C.TheDay AS [Date]
,ISNULL(C.NetWin, 0) AS NetWin
,P.CumulativeNetWin + ISNULL(C.NetWin, 0) AS CumulativeNetWin
,C.RN
FROM MyCTERec P
INNER JOIN MyCTE AS C ON C.RN = P.RN + 1
)
SELECT *
FROM MyCTERec
ORDER BY RN
OPTION (MAXRECURSION 0)
Note that this query will work if you have 1 record == 1 day! If you have multiple records in a day, the results will be different from the other query.
As I said here, if you want really fast calculation, put it into temporary table with sequential primary key and then calculate rolling total:
create table #Temp (
ID bigint identity(1, 1) primary key,
[Date] date,
NetWin decimal(29, 10)
)
insert into #Temp ([Date], NetWin)
select
dD.[Date],
sum(R.NetWinCURRENCYValue) as NetWin,
from dbo.dimPlayer as P
inner join dbo.factRevenue as R on P.playerKey = R.playerKey
inner join dbo.vw_Date as dD on Dd.dateKey = R.dateKey
where P.CustomerID = 12345
group by dD.[Date]
order by dD.[Date]
;with cte as (
select T.ID, T.[Date], T.NetWin, T.NetWin as CumulativeNetWin
from #Temp as T
where T.ID = 1
union all
select T.ID, T.[Date], T.NetWin, T.NetWin + C.CumulativeNetWin as CumulativeNetWin
from cte as C
inner join #Temp as T on T.ID = C.ID + 1
)
select C.[Date], C.NetWin, C.CumulativeNetWin
from cte as C
order by C.[Date]
I assume that you could have duplicates dates in the input, but don't want duplicates in the output, so I grouped data before puting it into the table.

Gettin error ORA-01732: data manipulation operation not legal on this view

Hi Gurus I am getting the error ORA-01732: data manipulation operation not legal on this view
when executing the below query
UPDATE (SELECT CR.AMOUNT AS AMOUNT,
CASE
WHEN MRG.AMOUNT_USD=0
THEN CR.AMOUNT
ELSE MRG.AMOUNT_USD
END AS AMOUNT_BILAT,
CR.ISUPDATED
FROM CRS_TT_BILAT_EXCL_MERGE1 MRG,CRS_T_CURRENT_RATES1 CR
WHERE SUBSTR(CR.DNIS_CD,1,3)=MRG.DNIS_CD
AND CR.PRODUCT_CUST_ID = MRG.PRODUCT_CUST_ID
AND CR.ISUPDATED <> 'Y'
AND ROWNUM = 1)
SET AMOUNT = AMOUNT_BILAT;
CR.ISUPDATED = 'Y';
I have simplified the above code from the below query
UPDATE CRS_T_CURRENT_RATES1 CR
SET CR.AMOUNT =
(SELECT
CASE
WHEN MRG.AMOUNT_USD=0
THEN CR.AMOUNT
ELSE MRG.AMOUNT_USD
END
FROM CRS_TT_BILAT_EXCL_MERGE1 MRG
WHERE SUBSTR(CR.DNIS_CD,1,3)=MRG.DNIS_CD
AND CR.PRODUCT_CUST_ID = MRG.PRODUCT_CUST_ID
AND ROWNUM = 1),
CR.ISUPDATED = 'Y'
WHERE EXISTS
(SELECT 1 FROM CRS_TT_BILAT_EXCL_MERGE1 MRG WHERE MRG.DNIS_CD = SUBSTR(CR.DNIS_CD, 1,3) AND CR.PRODUCT_CUST_ID = MRG.PRODUCT_CUST_ID )
AND
CR.ISUPDATED <> 'Y';
I was trying to optimize the 2nd query, since the second query uses two selects i was trying to replace that with a single query. Can any one please help me on this?
MERGE statement with selecting 1st row for each (AMOUNT_USD, DNIS_CD, PRODUCT_CUST_ID) - ROWNUM=1 condition from your query:
MERGE INTO CRS_T_CURRENT_RATES1 CR
USING (SELECT * FROM (
SELECT AMOUNT_USD,
DNIS_CD,
PRODUCT_CUST_ID
ROW_NUMBER() OVER (PARTITION BY AMOUNT_USD, DNIS_CD, PRODUCT_CUST_ID ORDER BY 1) AS ORD_NO
FROM CRS_TT_BILAT_EXCL_MERGE1
) WHERE ORD_NO = 1
) MGR
ON CR.PRODUCT_CUST_ID = MRG.PRODUCT_CUST_ID AND
SUBSTR(CR.DNIS_CD,1,3)=MRG.DNIS_CD
WHEN MATCHED THEN
UPDATE SET CR.AMOUNT = (CASE
WHEN MRG.AMOUNT_USD=0 THEN CR.AMOUNT
ELSE MRG.AMOUNT_USD
END),
ISUPDATED = 'Y'
WHERE ISUPDATED <> 'Y';
UPDATE: Using MERGE and ROWNUM won't work.
MERGE can help you avoid repeating SQL:
MERGE INTO CRS_T_CURRENT_RATES1 CR
USING
(
SELECT AMOUNT_USD, DNIS_CD, PRODUCT_CUST_ID
FROM CRS_TT_BILAT_EXCL_MERGE1
) MRG
ON
(
SUBSTR(CR.DNIS_CD,1,3) = MRG.DNIS_CD
AND CR.PRODUCT_CUST_ID = MRG.PRODUCT_CUST_ID
AND ROWNUM = 1
)
WHEN MATCHED THEN UPDATE SET
CR.ISUPDATED = 'Y',
CR.AMOUNT = CASE WHEN MRG.AMOUNT_USD=0 THEN CR.AMOUNT ELSE MRG.AMOUNT_USD END
Update
ROWNUM in the ON clause works on the updated table, not the data in the USING clause. The example below starts with two identical rows and only one gets updated:
create table test1(a number, b number);
insert into test1 values(1, 1);
insert into test1 values(1, 1);
merge into test1
using
(
select 1 a from dual
) test2
on (test1.a = test2.a and rownum = 1)
when matched then update set b = 0;
select * from test1;
A B
- -
1 0
1 1

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