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Transpose columns to row in a single query - response (1) by reddyrajendra2014
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Unicode data - response (4) by reddyrajendra2014
Carlosal, here below am providing example with some data wil give better explanation of my requirement.
ex:
col1
-------
abc
漢字;
abc漢
in col1 i have data like above . But translate_chk providing me below results.
No way i will come to know that this column has unicode data .Correct me if i'm wrong.
sel translate_chk('漢字;' using unicode_to_latin) -- result 0
sel translate_chk('abc' using unicode_to_latin) -- result 0
sel translate_chk('abc' using latin_to_unicode) -- result 0
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Delete duplicate in a single query - response (2) by Moutusi
Thanks Reddy for your reply. I need the delete SQL. After executing the SQL table(T1) will look like:
Table: T1
A B C
1 2 3
4 5 6
7 8 9
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Unicode data - response (5) by CarlosAL
Check your session character set. It MUST be unicode.
It is working for me as expected:
CREATE TABLE ECI_D.PRUEBAUNI(C_TXT VARCHAR(25) CHARACTER SET UNICODE);
INSERT INTO ECI_D.PRUEBAUNI VALUES ('漢字;');
SELECT TRANSLATE_CHK(C_TXT USING UNICODE_TO_LATIN) FROM ECI_D.PRUEBAUNI;
Translate_Chk(C_TXT using UNICODE_TO_LATIN)
1
HTH.
Cheers.
Carlos.
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Unicode data - response (6) by reddyrajendra2014
Carlosal, My session char set is ASCII , could you please tell me how to change it to unicode.
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Unicode data - response (7) by CarlosAL
What tool are you using?
In bteq: set session charset
In SQLA: depends on the connection (ODBC/.Net), but it's all in the connection parameters window.
In java (Teradata Studio/Eclipse) connection parameters window.
Cheers.
Carlos.
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swap values in two columns using update SQL - forum topic by Moutusi
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swap values in two columns using update SQL - response (1) by Glass
UPDATE T1 SET a = b,b=a;
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collect stats statement failure because of spool space - response (1) by vikash.dwh@gmail.com
Hi Nagendra,
It depend on various parameter
1.What is the spool space allocated to the user X with which you are trying to run and how many
numebr of Amsps u have for Teradata Box.?
2. At the time when u are running the collect stats with user X, is someone else or batch job with the same user X running some SQL/extract on the box.
3. If you have enough spool space try running the stats in a quiet period.
4. Also what is the size of the table where u r trying to collect the stats...If it is a very BIG table
then it will consume more spool space.
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Delete duplicate in a single query - response (3) by Glass
Moutusi,
Since ABC is your entire record a single SQL can't distinguish one record from the other with the same three values. You will delete both records.
Inserting into a set table is simple but if you don't have the access to create a new table
You could create a volatile table(set is default) and insert all rows into it, this will get rid of duplicates, then delete all records from TI , then insert back into your multiset table. Creating a volatile table requires no create table access on a database or perm space.
Rglass
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swap values in two columns using update SQL - response (2) by reddyrajendra2014
Glass , Its awesome . I couldn't expect that solution is this much Easy....
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Partition effectiveness - response (2) by levinra
Thanks for your reply Raja, but I don't think that's what I'm looking for.
I guess I'm trying to get some assurance that if the optimizer uses a partition for access when it builds the EXPLAIN plan instead of an all-rows scan, I can trust it will be the most efficient access method, regardless of the number of partitions it uses for retrieval.
The large number of partitions I saw in the EXPLAIN took me by surprise, and that is why I'm asking about this.
Robin
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Delete duplicate in a single query - response (4) by Raja_KT
You can also do thus:
create table tmp as
(select * from abc qualify row_number() over (partition by a,b,c order by a,b,c)=1) with data;
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Sum of Column_B for each distinct Column_A - forum topic by jayantonhu
How do I take a sum of one column (exposures) if and only if another column (ID) is distinct? Note that Exposure is a calculated field and will always be the same for a single ID.
I have a table that looks like this:
ID Exposure Claims
A 1 50
A 1 100
A 1 5
B .25 1000
C 1 10
C 1 100
C 1 500
C 1 252
Output: 2.25
Tags:
Forums:
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summing serial numbers in a single column with out using an external function. - forum topic by txwylde
I have an audit table that I am creating a view for so I can create some reporting for. In the original table, ther serials are separated by a comma and are all in one comlumn. Here is an example:
serial_number
-----------------------------------------------------------------------
CO2LM3VGFD57,C8PL83ZZDT9V,D66J23Q0DNQ,DMPGK13SDFJ1
YM9402FD72Q,UM830WZZYXX,1B84163E201
F17JLJMSF8GK
DLXKRBTDF182,DLXKRCD0F182,DLXKRCBZF182,CNU3159MQ4,CNU3159MN0 CNU314BHYY
C02MC0B1FD58
DLXMZ0U0FH13
F18L96KNFH1C
C02KT0MXDRVG
V5046NVVETV
C39JQ6GCDTTR
Here is the query I am using to create the view:
select
cast(date_processed as date),
initiator,
SUM((char_length(serial_number) - char_length(apputil_user.oreplace(serial_number, ','))) + 1) as num_serial
from datamining_biz_app4.legal_data_audit
where serial_number <> ''
group by 1,2
order by 1,2;
Is there a way to sum the serials without using the apputil_user.oreplace function?
Thanks!
Bill
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Forums:
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Different types of Indexes in Teradata - forum topic by srik16
Hello, Looking for the various types of Indexes that are available in Teradata 13, what's the equivalent of Oracle BTree and Bitmap Indexes in Teradata?
Thanks for your help with this.
Forums:
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Sum of Column_B for each distinct Column_A - response (1) by Raja_KT
Does it serve the functioanlity if it is:
select sum(sm) from
(select id,exposure sm from tabl1 group by 1,2) a
it brings 2.25
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Different types of Indexes in Teradata - response (1) by Raja_KT
Teradata has many indexes such as Primary indexes(unqiue , non unique), Secondary indexes(unqiue , non unique), join indexes, hash indexes,sparse indexes..
rows of tables and indexes are distributed to the AMPs using different methods of row allocation. It is MPP architecture.
In Oracle in a b-tree, you walk the branches until you get to the node that has the data you want to use. No amps.
Bit map indexes in oracle, is used for low predicates. However, I see that making too many indexes for a system creates havoc. Indexes are created only if there is a need to suit the system performance.
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Query Banding functionality in Teradata - forum topic by SriniD
Hi All,
As there was a drwaback “getQueryBandValue” is evaluated once per row, thus increasing CPU utilization. with respect to. Query Banding functionality in earlier versions of Teradata, can someone help me whether this drawback has resolved in the latest versions of TD like TD13, TD14... If yes, please help me to understand how it has been resolved.
Thanks in advance,
Sri.
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How to limit rows to only those where there are duplicates of a specific column? - response (9) by dnoeth
Hi Chandan,
based on your result set (I didn't fully understand your explanantion) this should work:
CREATE VOLATILE TABLE vt ( ACCT INT, ID INT, code CHAR(3))
ON COMMIT PRESERVE ROWS;
INS vt(123 , 2500 ,'AB1');
INS vt(123 , 24386 ,'AB2');
INS vt(123 , 2500 ,'AB3');
INS vt(123 , 2500 ,'AB4');
INS vt(123 , 2500 ,'AB5');
INS vt(123 , 24386 ,'AB6');
INS vt(123 , 2400 ,'AB7');
INS vt(123 , 2400 ,'AB8');
SELECT dt.*,
COALESCE(MAX(x)
OVER (PARTITION BY acct
ORDER BY code
ROWS UNBOUNDED PRECEDING), code)
FROM
(
SELECT vt.*,
CASE WHEN id = 24386
THEN MIN(code)
OVER (PARTITION BY acct
ORDER BY code
ROWS BETWEEN 1 FOLLOWING AND 1 FOLLOWING)
END AS x
FROM vt
) AS dt
QUALIFY id <> 24386
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MOUSUSI,
sel
max(case when rn=1 then ref.a end) as X,
max(case when rn=2 then ref.a end) as y,
max(case when rn=3 then ref.a end) as z
from
(
sel
a,b
,
row_number() over ( order by a,b )rn
from temp1
)
ref
UNION
sel
max(case when rn=1 then ref.B end) as X,
max(case when rn=2 then ref.B end) as y,
max(case when rn=3 then ref.B end) as z
from
(
sel
a,b
,
row_number() over ( order by a,b )rn
from temp1
)
ref