I'm working in Teradata to Oracle migration project. How can i modify the below query which is using QUALIFY in Teradata.
//QUERY 1
SELECT S.ID as Id,
S.MP_CD as Code,
S.GM_CD as GmCode,
S.GM_MSR_NBR as Mea_Year,
S.STTS_CD as YearCode,
S.TRMNTN_DTM as TerminationDate
FROM PD.RVY S, LOAD_LOG TLL
WHERE S.UPDTD_LOAD = TLL.LOG_KEY AND TLL.BLSH_CD = 'Y' AND S.STTS_CD IN ( 'C', 'P' )
QUALIFY ROW_NUMBER () OVER (PARTITION BY S.GM_CD ,S.MP_CD ,S.GM_MSR_NBR,S.STTS_CD
ORDER BY S.SO_DTM DESC
) = 1;
//Query 2
SELECT SP.ID,
SP.SO_DTM,
SP.TAX_ID,
SP.USER_ID,
SP.FRST_NM,
SP.LAST_NM,
SP.PHONE_NBR,
QSRP.TAX_ID,
QSRP.ROW_ID,
MAX(SP.SO_DTM) OVER (PARTITION BY SP.ID, SP.TAX_ID) MAX_SO_DTM
FROM VOPR_RMSY SP,VOPR_RMSY_SPNS QSRP
WHERE SP.ID =:URVYID AND QSRP.TAX_ID =:RPAXID
AND SP.ID = QSRP.ID AND SP.TAX_ID = QSRP.TAX_ID AND SP.SO_DTM = QSRP.SO_DTM
QUALIFY (SP.SO_DTM=MAX_SO_DTM AND QSRP.SO_DTM = MAX_SO_DTM)
GROUP BY SP.ID,SP.SO_DTM,SP.TAX_ID,SP.USER_ID,SP.FRST_NM,SP.LAST_NM,SP.PHONE_NBR,
QSRP.TAX_ID,QSRP.ROW_ID;
For this tried with HAVING instead of qualify but got an Error:
ORA-00904: "MAX_SO_DTM": invalid identifier
00904. 00000 - "%s: invalid identifier"
Seems like alias used for MAX is not working here....
Any of your help is really appreciated!
EDITED:
SELECT * FROM
(
SP.ID,
SP.SO_DTM,
SP.TAX_ID,
SP.USER_ID,
SP.FRST_NM,
SP.LAST_NM,
SP.PHONE_NBR,
QSRP.TAX_ID,
QSRP.ROW_ID,
MAX(SP.SO_DTM) OVER (PARTITION BY SP.ID, SP.TAX_ID) AS MAX_SO_DTM
FROM VOPR_RMSY SP,VOPR_RMSY_SPNS QSRP
WHERE SP.ID =:URVYID AND QSRP.TAX_ID =:RPAXID AND SP.ID = QSRP.ID AND SP.TAX_ID =
QSRP.TAX_ID AND SP.SO_DTM = QSRP.SO_DTM
GROUP BY SP.ID,SP.SO_DTM,SP.TAX_ID,SP.USER_ID,SP.FRST_NM,SP.LAST_NM,SP.PHONE_NBR,
QSRP.TAX_ID,QSRP.ROW_ID;
)dt WHERE (SP.SO_DTM=MAX_SO_DTM AND QSRP.SO_DTM = MAX_SO_DTM)
i know that i have to use alias dt for outer WHERE instead of SP and QSRP but here MAX_SO_DTM is compared with SO_DTM from two different tables. is there any other way to modify this?
Thanks!
Both QUALIFY and reusing an alias is Teradata specific.
Your try with HAVING is failing, because this is the logical sequence of processing a query:
FROM
WHERE
GROUP BY
HAVING
OLAP-function
QUALIFY -- Teradata specific
SAMPLE or EXPAND ON -- both are Teradata specific
ORDER
To resolve this you have to use a Derived Table/Inline View and move the QUALIFY condition into the outer WHERE.
SELECT *
FROM
(
SELECT S.ID as Id,
S.MP_CD as Code,
S.GM_CD as GmCode,
S.GM_MSR_NBR as Mea_Year,
S.STTS_CD as YearCode,
S.TRMNTN_DTM as TerminationDate,
ROW_NUMBER () OVER (PARTITION BY S.GM_CD ,S.MP_CD ,S.GM_MSR_NBR,S.STTS_CD
ORDER BY S.SO_DTM DESC) AS rn
FROM PD.RVY S, LOAD_LOG TLL
WHERE S.UPDTD_LOAD = TLL.LOG_KEY AND TLL.BLSH_CD = 'Y' AND S.STTS_CD IN ( 'C', 'P' )
) dt
WHERE rn = 1;
The same technique must be used when you want to reuse an alias.
EDIT:
The 2nd query can be rewritten as:
SELECT *
FROM
(
SELECT
SP.ID,
SP.SO_DTM,
SP.TAX_ID,
SP.USER_ID,
SP.FRST_NM,
SP.LAST_NM,
SP.PHONE_NBR,
QSRP.TAX_ID,
QSRP.ROW_ID,
MAX(SP.SO_DTM) OVER (PARTITION BY SP.ID, SP.TAX_ID) AS MAX_SO_DTM
FROM VOPR_RMSY SP,VOPR_RMSY_SPNS QSRP
WHERE SP.ID =:URVYID
AND QSRP.TAX_ID =:RPAXID
AND SP.ID = QSRP.ID
AND SP.TAX_ID = QSRP.TAX_ID
AND SP.SO_DTM = QSRP.SO_DTM
GROUP BY SP.ID,SP.SO_DTM,SP.TAX_ID,SP.USER_ID,SP.FRST_NM,SP.LAST_NM,SP.PHONE_NBR,
QSRP.TAX_ID,QSRP.ROW_ID
)dt
WHERE SO_DTM=MAX_SO_DTM
You don't need to do both comparisons *(SP.SO_DTM=MAX_SO_DTM AND QSRP.SO_DTM = MAX_SO_DTM)*, because they the 2nd is redundant as the tables are joined on *SP.SO_DTM = QSRP.SO_DTM*.
Otherwise you had to add QSRP.SO_DTM to the Derived Table using a different alias (e.g. QSRP_SO_DTM). In the outer level there's no more SP/QSRP but only dt, so it would be:
WHERE (SO_DTM=MAX_SO_DTM AND QSRP_SO_DTM = MAX_SO_DTM)
Related
I need Only one unique result from tableB.Field to tableA.Field
I am using sdo operator sdo_nn, this is the code:
UPDATE table1 t1
SET t1.fieldA = (SELECT T2.fieldB,SDO_NN_DISTANCE(1) distance
FROM table1 T1, table2 T2
WHERE
(sdo_nn(t1.geometry,t2.geometry,'SDO_NUM_RES=1',1)= 'TRUE')
ORDER BY DIST
)
WHERE EXISTS(
SELECT 1
FROM table2 t2
WHERE sdo_nn(t1.geometry, t2.geometry,'SDO_NUM_RES=1',1)='TRUE'
AND(t2.cell_name = 'string1' or t2.cell_name = string2')AND t1.fieldA = NULL
);
In the select sentence of the subquery i get an error because i only use one field(t1.fieldA), but in the sentence i use the operator SDO_NN_DISTANCE(1) and the sql developer count this operator like another field. What is the correct way to write this sentence? I only use sql because i need to insert this code in vba
Thanks!!!
Obviously, you can't (simplified)
set t1.fieldA = (t2.fieldB, distance) --> you want to put two values into a single column
Therefore, get fieldB alone from the subquery which uses analytic function (row_number) to "sort" rows by sdo_nn_distance(1) desc; then get the first row's fieldB value.
Something like this (I hope I set the parenthesis right):
UPDATE table1 t1
SET t1.fieldA =
(SELECT x.fieldB --> only fieldB
FROM (SELECT T2.fieldB, --> from your subquery
SDO_NN_DISTANCE (1) distance,
ROW_NUMBER ()
OVER (ORDER BY sdo_nn_distance (1) DESC) rn
FROM table1 T1, table2 T2
WHERE (sdo_nn (t1.geometry,
t2.geometry,
'SDO_NUM_RES=1',
1) = 'TRUE')) x
WHERE rn = 1) --> where RN = 1
WHERE EXISTS
(SELECT 1
FROM table2 t2
WHERE sdo_nn (t1.geometry,
t2.geometry,
'SDO_NUM_RES=1',
1) = 'TRUE'
AND ( t2.cell_name = 'string1'
OR t2.cell_name = 'string2')
AND t1.fieldA IS NULL);
I need to create a teradata macro to extract information into a volatile table first, then do CTE to extract data from this volatile table and insert into a teradata table, tried different ways all fail, appreciate help!
CREATE MACRO database.macro_insertion_tablename AS (
CREATE VOLATILE TABLE vt AS
(
SELECT
id, bu,
CONCAT(TO_CHAR(comment_date, 'yyyy-mm-dd HH24:MI:SS'), ' ', action) AS full_action,
ROW_NUMBER() OVER (PARTITION BY id ORDER BY date DESC) AS row_num,
COUNT(*) OVER (PARTITION BY id) as cnt
FROM database.table1
) WITH DATA UNIQUE PRIMARY INDEX(id, row_num) ON COMMIT PRESERVE ROWS;
WITH RECURSIVE cte (id, bu, act, rn) AS
(
SELECT
id, bu
,CAST(full_action AS VARCHAR(5000)) AS full_action
,row_num
FROM vt
WHERE row_num = cnt
UNION ALL
SELECT
vt.id, vt.bu
,cte.act || ' / ' || vt.full_action
,vt.row_num
FROM vt
JOIN cte On vt.id = cte.id AND vt.row_num = cte.rn - 1
)
INSERT INTO database.table (id, bu, full_action)
SELECT id, bu, act
FROM cte
WHERE rn = 1;
DROP TABLE vt;
);
DDL must be the only statement in a Teradata Macro.
As workaround you could switch to a Global Temporary Table which is defined once and then you simply Insert/Select into it instead of CREATE VOLATILE TABLE.
But in your case there's no need for a temp table plus inefficient recursive processing to get a "group concat":
SELECT id, max(bu) -- maybe min(bu)?
XmlAgg(Concat(To_Char(comment_date, 'yyyy-mm-dd HH24:MI:SS'), ' ', action)
ORDER BY comment_date) (VARCHAR(5000)) AS full_action
FROM database.table1
GROUP BY 1
will give you a similar result.
To follow up on my comments, you should be able to define multiple CTEs in the same statement. It may be tricky getting the RECURSIVE CTE to work, but it sounds like it's possible. Maybe something like this:
CREATE MACRO database.macro_insertion_tablename AS (
WITH vt (id, bu, full_action, row_num, cnt) AS
(
SELECT
id, bu,
CONCAT(TO_CHAR(comment_date, 'yyyy-mm-dd HH24:MI:SS'), ' ', action) AS full_action,
ROW_NUMBER() OVER (PARTITION BY id ORDER BY date DESC) AS row_num,
COUNT(*) OVER (PARTITION BY id) as cnt
FROM database.table1
),
RECURSIVE cte (id, bu, act, rn) AS
(
SELECT
id, bu
,CAST(full_action AS VARCHAR(5000)) AS full_action
,row_num
FROM vt
WHERE row_num = cnt
UNION ALL
SELECT
vt.id, vt.bu
,cte.act || ' / ' || vt.full_action
,vt.row_num
FROM vt
JOIN cte On vt.id = cte.id AND vt.row_num = cte.rn - 1
)
INSERT INTO database.table (id, bu, full_action)
SELECT id, bu, act
FROM cte
WHERE rn = 1;
);
I don't have a Teradata system to test with, so not 100% it will work as-is, but give it a try. You may need to change RECURSIVE to WITH RECURSIVE and also the ordering of the CTE queries (i.e. put the RECURSIVE one first). Take a look at these two links:
Teradata Forum - Multiple With Clause
teradata Forum - Common Table Expressions
I have a oracle query
select id from (
select ID, ROW_NUMBER() over (partition by LATEST_RECEIPT order by ID) rownumber
from Table
where LATEST_RECEIPT in
(
select LATEST_RECEIPT from Table
group by LATEST_RECEIPT
having COUNT(1) > 1
)
) t
where rownumber <> 1;
The data type of LATEST_RECEIPT was earlier varchar2(4000) and this query worked fine. Since the length of the column needs to be extended i modified it to CLOB, after which this fails. Could anyone help me fix this issue or provide a work around?
You can change your inner query to look for other rows with the same last_receipt value but a different ID (assuming ID is unique); if another row exists then that is equivalent to your count returning greater than one. But you can't simply test two CLOB values for equality, you need to use dbms_lob.compare:
select ID
from your_table t1
where exists (
select null from your_table t2
where dbms_lob.compare(t2.LATEST_RECEIPT, t1.LATEST_RECEIPT) = 0
and t2.ID != t1.ID
-- or if ID isn't unique: and t2.ROWID != t1.ROWID
);
Applying the row number filter is tricker, as you also can't use a CLOB in the analytic partition by clause. As André Schild suggested, you can use a hash; here passing the integer value 3, which is the equivalent of dbms_crypto.hash_sh1 (though in theory that could change in a future release!):
select id from (
select ID, ROW_NUMBER() over (partition by dbms_crypto.hash(LATEST_RECEIPT, 3)
order by ID) rownumber
from your_table t1
where exists (
select null from your_table t2
where dbms_lob.compare(t2.LATEST_RECEIPT, t1.LATEST_RECEIPT) = 0
and t2.ID != t1.ID
-- or if ID isn't unique: and t2.ROWID != t1.ROWID
)
)
where rownumber > 1;
It is of course possible to get a hash collision, and if that happened - you had two latest_receipt values which both appeared more than once and both hashed to the same value - then you could get too many rows back. That seems pretty unlikely, but it's something to consider.
So rather than ordering you can only look for rows which have the same lastest_receipt and a lower ID:
select ID
from your_table t1
where exists (
select null from your_table t2
where dbms_lob.compare(t2.LATEST_RECEIPT, t1.LATEST_RECEIPT) = 0
and t2.ID < t1.ID
);
Again that assumes ID is unique. If it isn't then you could still use rowid instead, but you would have less control over which rows were found - the lowest rowid isn't necessarily the lowest ID. Presumably you're using this to dine rows to delete. If you actually don't mind which row you keep and which you delete then you could still do:
and t2.ROWID < t1.ROWID
But since you are currently ordering that probably isn't acceptable, and hashing might be preferable, despite the small risk.
I am trying to assign 'A' to [Student Details].group based on this SELECT statement.
SELECT TOP (10) PERCENT [Person Id], [Given Names], Surname, Gpa, [Location Cd]
FROM [Student Details]
WHERE ([Location Cd] = 'PAR')
ORDER BY Gpa DESC
I can't figure out how to use a SELECT statement in an UPDATE statement.
Can someone please explain how to accomplish this?
I am using ASP .NET and MsSQL Server if it makes a difference.
Thanks
I'm assuming you want to update these records and then return them :
SELECT TOP (10) PERCENT [Person Id], [Given Names], Surname, Gpa, [Location Cd]
INTO #temp
FROM [Student Details]
WHERE ([Location Cd] = 'PAR')
ORDER BY Gpa DESC
update [Student Details] set group='A' where [person id] in(select [person id] from #temp)
select * from #temp
I'm also assuming person id is the PK of student details
Try this using CTE (Common Table Expression):
;WITH CTE AS
(
SELECT TOP 10 PERCENT [Group]
FROM [Student Details]
WHERE ([Location Cd] = 'PAR')
ORDER BY Gpa DESC
)
UPDATE CTE SET [Group] = 'A'
Is this you want?
Update top (10) Percent [Student Details] set [group] = 'A'
where [Location Cd] = 'PAR' AND [group] is null
I am trying to run query
select * from OS_Historystep where step_name = '011' and finish_date = max(finish_date) ;
But i am getting error that
ORA-00934: group function is not allowed here
00934. 00000 - "group function is not allowed here"
*Cause:
*Action:
Error at Line: 12 Column: 72
what i am doing wrong?
Thanks
You can't use an aggregate in a where clause. Also, you can't mix non-aggregated data and aggregated data from the same column in a single select. You'll need to use a sub-query:
select *
from OS_Historystep hs1
where step_name = '011'
and finish_date = (select max(finish_date)
from OS_Historystep hs2
where hs2.step_name = hs1.step_name);
you cannot reference an aggregate like that. you would either have to put a sub query up like below (assuming you wanted the max(finish_date) to mean the max finish date for step 011 and not the max finish date in the whole table (which may return no rows):
select *
from OS_Historystep
where step_name = '011'
and finish_date = (select max(finish_date)
from OS_Historystep
where step_name = '011');
or use an analytic function
select *
from (select s.*, rank() over (partition by step_name order by finish_date desc) rnk
from OS_Historystep s
where step_name = '011')
where rnk = 1;