I tried to create a temporary table but it's showing me this error:
ORA-00903: invalid table name.
What did I did wrongly? This is what I did:
create private temporary table PID
ON COMMIT PRESERVE ROWS
as
select distinct
lot_id,
ssr.run_oid,
process_id
from sigma.sigma_run ssr
inner join sigma.sigma_lot ssl on ssl.run_oid = ssr.run_oid
From the CREATE TABLE documentation:
Restrictions on Private Temporary Tables
In addition to the general limitations of temporary tables, private temporary tables are subject to the following restrictions:
The name of private temporary tables must always be prefixed with whatever is defined with the init.ora parameter PRIVATE_TEMP_TABLE_PREFIX. The default is ORA$PTT_.
So you need to use:
create private temporary table ORA$PTT_PID
ON COMMIT PRESERVE DEFINITION
AS
select distinct
lot_id,
ssr.run_oid,
process_id
from sigma.sigma_run ssr
inner join sigma.sigma_lot ssl on ssl.run_oid = ssr.run_oid
Note: You also want PRESERVE DEFINITION and not PRESERVE ROWS.
fiddle
Related
I've created an VOLATILE MUTISET TABLE with name tmp, and then trying to create another table as merging tmp and permanent table.
It results in Error 3806: Table/view/trigger name 'tmp' is ambiguous
What am I doing wrong?
CREATE MULTISET VOLATILE TABLE tmp2 AS
(
SEL
a.*,
tmp.id
from library.table a
inner join tmp
on a.sk = tmp.sk
)
WITH DATA
PRIMARY INDEX (id)
ON COMMIT PRESERVE ROWS
The following entry in Teradata manual says the following:
Resolving Table References
When encountering an unqualified table name, the system looks for a table by that name in all of the following databases.
The default database
Any databases referenced by the SQL request
The logon user database for a volatile table by that name
The search must find the table name in only 1 of those databases. Teradata Database returns the “ambiguous table name” error message if the table name exists in more than 1 of those databases.
I am using HDInsight and need to delete my clusters when I am finished running queries. However, I need the data I gather to survive for another day. I am working on queries that would create calculated columns from table1 and insert them into table2. First I wanted a simple test to copy the rows. Can you create an external table from a select statement?
drop table if exists table2;
create external table table2 as
select *
from table1
STORED AS TEXTFILE LOCATION 'wasb://{container name}#{storage name}.blob.core.windows.net/';
yes but you have to seperate it into two commands. First create the external table then fill it.
create external table table2(attribute STRING)
STORED AS TEXTFILE
LOCATION 'table2';
INSERT OVERWRITE TABLE table2 Select * from table1;
The schema of table2 has to be the same as the select query, in this example it consists only of one string attribute.
I know this is too stale question but here is the solution.
CREATE EXTERNAL TABLE table2
STORED AS textfile
LOCATION wasb://....
AS SELECT * FROM table1
Since create external table with "as select" clause is not supported in Hive, first we need to create external table with complete DDL command and then load the data into the table. Please go through this for different data format supports.
create external table table_ext(col1 typ1,...)
STORED AS ORC
LOCATION 'table2'; // optional if not provided then default location is used
INSERT OVERWRITE TABLE table_ext Select * from table1;
make sure table_ext has same DDL as table1.
When I run a script in PostgreSQL I usually do the following from psql:
my_database> \i my_script.sql
Where in my_script.sql I may have code like the following:
select a.run_uid, s.object_uid into temp_table from dt.table_run_group as a
inner join dt.table_segment as s on a.group_uid = s.object_uid;
In this particular case, I am only interested in creating temp_table with the results of the query.
Are these results in disk on the server? In memory? Is the table stored permanently?
Temporary tables are stored in RAM until the available memory is used up, at which time they spill onto disk. The relevant setting here is temp_buffers.
Either way, they live for the duration of a session and are dropped at the end automatically.
You can also drop them at the end of a transaction automatically (ON COMMIT DROP) or manually any time.
Temporary table are only visible to the the same user in the same session. Others cannot access it - and also not conflict with it.
Always use CREATE TABLE tbl AS .... The alternative form SELECT ... INTO tbl is discouraged since it conflicts with the INTO clause in plpgsql.
Your query could look like:
CREATE TEMP TABLE tbl AS
SELECT a.run_uid, s.object_uid
FROM dt.table_run_group a
JOIN dt.table_segment s ON a.group_uid = s.object_uid;
SELECT INTO table ... is the same as CREATE TABLE table AS ..., which creates a normal, permanent table.
If I create a temporary table using # sign:
SELECT * INTO #temp FROM dbo.table
Where is this table located? I can't find this from tempdb.
Those tables are created in your tempDB - but the table name might not be exactly as you defined.
In my case, I get:
#temp______________________________000000000003
Try this:
SELECT * INTO #temp FROM dbo.table
SELECT * FROM tempdb.sys.tables
You should see an entry for that temp table you've just created....
When you declare a temporary table, SQL Sever adds some additional characters on its name in order to provide a unique system name for it and then it stores it in tempDB in the sysobjects table. Even though you can query the temporary table with its logical name, internally is known with the exact name SQL Server has set.
How are you looking for them?
If you do a select you'll get the data.
But the table is only available in the session, just for the user who created it (you can have global temp tables).
They are stored in temp db.
Local temp tables can be created using hash (#) sign prior to table name.
They are visible only in current connection. When connection is dropped its scope ends as well.
It is possible to create and use local temp table with the same name simultaneously in two different connections.
Read More
http://sqlnetcode.blogspot.com/2011/11/there-is-already-object-named-temp-in.html
I suspect this issue rose from the fact that if you don't right click and refresh the 'Temporary Tables' folder, SSMS will not show you the temp table immediately.
I would like to create a temporary table in a Oracle database
something like
Declare table #table (int id)
In SQL server
And then populate it with a select statement
Is it possible?
Thanks
Yep, Oracle has temporary tables. Here is a link to an AskTom article describing them and here is the official oracle CREATE TABLE documentation.
However, in Oracle, only the data in a temporary table is temporary. The table is a regular object visible to other sessions. It is a bad practice to frequently create and drop temporary tables in Oracle.
CREATE GLOBAL TEMPORARY TABLE today_sales(order_id NUMBER)
ON COMMIT PRESERVE ROWS;
Oracle 18c added private temporary tables, which are single-session in-memory objects. See the documentation for more details. Private temporary tables can be dynamically created and dropped.
CREATE PRIVATE TEMPORARY TABLE ora$ptt_today_sales AS
SELECT * FROM orders WHERE order_date = SYSDATE;
Temporary tables can be useful but they are commonly abused in Oracle. They can often be avoided by combining multiple steps into a single SQL statement using inline views.
Just a tip.. Temporary tables in Oracle are different to SQL Server. You create it ONCE and only ONCE, not every session. The rows you insert into it are visible only to your session, and are automatically deleted (i.e., TRUNCATE, not DROP) when you end you session ( or end of the transaction, depending on which "ON COMMIT" clause you use).
CREATE GLOBAL TEMPORARY TABLE Table_name
(startdate DATE,
enddate DATE,
class CHAR(20))
ON COMMIT DELETE ROWS;
CREATE TABLE table_temp_list_objects AS
SELECT o.owner, o.object_name FROM sys.all_objects o WHERE o.object_type ='TABLE';