Here we have to move clob columns along with other columns in a single statement in oracle like
Insert into table_name#dblink (other_data_type_columns , clob_columns)
Select other_data_type_columns , clob_columns from table_2#dblink;
Is this possible ,and we have only one area where we have db_links . Please suggest if Incase any alternatives exist
Make a view of that SELECT Query and then execute same statement.
you can use select Query as Remote Query also.
Related
How do I drop a few tables (e.g. 1 - 3) using the output of a SELECT statement for the table names? This is probably standard SQL, but specifically I'm using Apache Impala SQL accessed via Apache Zeppelin.
So I have a table called tables_to_drop with a single column called "table_name". This will have one to a few entries in it, each with the name of another temporary table that was generated as the result of other processes. As part of my cleanup I need to drop these temporary tables whose names are listed in the "tables_to_drop" table.
Conceptually I was thinking of an SQL command like:
DROP TABLE (SELECT table_name FROM tables_to_drop);
or:
WITH subquery1 AS (SELECT table_name FROM tables_to_drop) DROP TABLE * FROM subquery1;
Neither of these work (syntax errors). Any ideas please?
even in standard sql this is not possible to do it the way you showed.
in standard sql usually you can use dynamic sql which impala doesn't support.
however you can write an impala script and run it in impala shell but it's going to be complicated for such task, I would prepare the drop statement using select and run it manually if this is one-time thing:
select concat('DROP TABLE IF EXISTS ',table_name) dropstatements
from tables_to_drop
my query just runs and doesnt execute, what is wrong. work on oracle sql developer, company server
CREATE TABLE voice2020 AS
SELECT
to_char(SDATE , 'YYYYMM') as month,
MSISDN,
SUM(CH_MONEY_SUBS_DED)/100 AS AIRTIME_VOICE,
SUM(CALLDURATION/60) AS MIN_USAGE,
sum(DUR_ONNET_OOB/60) as DUR_ONNET_OOB,
sum(DUR_ONNET_IB/60) as DUR_ONNET_IB,
sum(DUR_ONNET_FREE/60) as DUR_ONNET_FREE,
sum(DUR_OFFNET_OOB/60) as DUR_OFFNET_OOB,
sum(DUR_OFFNET_IB/60) as DUR_OFFNET_IB,
sum(DUR_OFFNET_FREE/60) as DUR_OFFNET_FREE,
SUM(case when sdate < to_date('20190301','YYYYMMDD')
then CH_MONEY_PAID_DED-nvl(CH_MONEY_SUBS_DED,0)-REV_VOICE_INT-REV_VOICE_ROAM_OUTGOING-REV_VOICE_ROAM_Incoming
else (CH_MONEY_OOB-REV_VOICE_INT-REV_VOICE_ROAM_OUTGOING-REV_VOICE_ROAM_Incoming) end)/100 AS VOICE_OOB_SPEND
FROM CCN.CCN_VOICE_MSISDN_MM#xdr1
where MSISDN IN ( SELECT MSISDN FROM saayma_a.BASE30112020) --change date
GROUP BY
MSISDN,
to_char(SDATE , 'YYYYMM')
;
This is a performance issue. Clearly the query driving your CREATE TABLE statement is taking too long to return a result set.
You are querying from a table in a remote database (CCN.CCN_VOICE_MSISDN_MM#xdr1) and then filtering against a local table (saayma_a.BASE30112020) . This means you are going to copy all of that remote table across the network, then discard the records which don't match the WHERE clause.
You know your data (or at least you should know it): does that sound efficient? If you're actually discarding most of the records you should try to filter CCN_VOICE_MSIDN_MM in the remote database.
If you need more advice you need to provide more information. Please read this post about asking Oracle tuning questions on this site, then edit your question to include some details.
You are executing CTAS (CREATE TABLE AS SELECT) and the purpose of this query is to create the table with data which is generated via this query.
If you want to just execute the query and see the data then remove first line of your query.
-- CREATE TABLE voice2020 AS
SELECT
.....
Also, the data of your actual query must be present in the voice2020 table if you have already executed it once.
Select * from voice2020;
Looks like you are trying to copying the data from one table to another table, Can you once create the table if it's not created and then try this statement.
insert into target_table select * from source_table;
I have this query
SELECT id, UTL_I18N.RAW_TO_NCHAR(DBMS_CRYPTO.DECRYPT(password,
pkg_so_42979606.cipher_type(),
UTL_ENCODE.BASE64_DECODE(UTL_I18N.STRING_TO_RAW('pMV3D4xhyfNxp3YyfLWzAErGcKkIjK3X6uc/WIeVTls=', 'AL32UTF8'))),
'AL32UTF8') password
FROM customeren;
I want to select this table. But i don't want to write this code again and again. What i need to do? How select data from this table in easier way? Oracle 11g XE
You could create a view with the selection criteria above and then just call your select query on the view. Not sure if Oracle syntax is the same but in SQL Server it would be
CREATE VIEW myschema.SomeViewName AS
SELECT id, UTL_I18N.RAW_TO_NCHAR(DBMS_CRYPTO.DECRYPT(password,
pkg_so_42979606.cipher_type(),
UTL_ENCODE.BASE64_DECODE(UTL_I18N.STRING_TO_RAW('pMV3D4xhyfNxp3YyfLWzAErGcKkIjK3X6uc/WIeVTls=', 'AL32UTF8'))),
'AL32UTF8') password
FROM customeren;
Then you can call SELECT * FROM myschema.SomeViewName, although using wildcards is generally not a good idea because you return all columns, when you may not require them. If you want to pass in parameters dynamically then you could consider using a function instead.
I have a requirement to construct an SQL that has a where clause which is expected to look into a file entries to be used in that clause.
SELECT DISTINCT '/',t_05.puid, ',', t_01.puid,'/', t_01.poriginal_file_name
FROM PWORKSPACEOBJECT t_02, PREF_LIST_0 t_03, PPOM_APPLICATION_OBJECT t_04, PDATASET t_05, PIMANFILE t_01
WHERE t_03.pvalu_0 = t_01.puid AND t_02.puid = t_03.puid AND t_03.puid = t_04.puid AND t_04.puid = t_05.puid AND t_02.puid IN ( 'izeVNXjf44e$yB',
'gWYRvN9044e$yB' );
The above is the SQL query. As you can see the IN clause has two different strings ( puids ) that are to be considered. But in my case, this list is like 50k entries long and would come from splunk and will be in a text file.
Sample output of the text file looks as belows:
'gWYRvN9044e$yB',
'DOZVpdOQ44e$yB',
'TlfVpdOQ44e$yB',
'wOWRehUc44e$yB',
'wyeRehUc44e$yB',
'w6URehUc44e$yB',
'wScRehUc44e$yB',
'yzXVNXjf44e$yB',
'guWRvN9044e$yB',
'QiYRehUc44e$yB',
'gycRvN9044e$yB'
I am not an SQL guru, but a quick google on this gave me a reference to OPENROWSET construct, which is not available on Oracle.
Can you please suggest some pointers on what can be done to circumvent the problem.
Thanks,
Pavan.
Consider using an external table, SQL Loader or perhaps loading the file into a table in the application layer and querying it normally.
I would recommend creating a Global Temporary table, adding the rows to that table, and then joining to your temp table.
How to create a temporary table in Oracle
Other options:
You could also use pipelined functions:
https://oracle-base.com/articles/misc/pipelined-table-functions
Or use the with as... construct to fold the data into the SQL. But that would create a long SQL statement.
I have a database on SQL Server and would like to use a column in one of my tables in a linked server openquery I'm running to an Oracle database in order to match values between the two and insert the result into columns in my table in SQL Server .
Essentially I want it to be like this:
SELECT col1, col2, col3, col4
FROM OPENQUERY(link, 'SELECT * FROM Oracle_Table
WHERE ID = MSSQL.dbo.table.ID`)
So I'd like to be able to use my internal table column values to query an external database. They are related tables but different systems.
Would it be possible to get a big list of the values in the SQL Server table column and use it as a variable in the Oracle query? I've searched extensively online but haven't been able to find this one.
You can't pass parameters like I wanted to, but I ended up creating a bunch of queries in Powershell using a for loop and variables within the string to create my large query, then put a UNION ALL after each SELECT FROM OPENQUERY()