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• Oracle: Is there a way to get the column data types for a view?

  - by rally25rs

  For a table in oracle, I can query "all_tab_columns" and get table column information, like the data type, precision, whether or not the column is nullable. In SQL Developer or TOAD, you can click on a view in the GUI and it will spit out a list of the columns that the view returns and the same set of data (data type, precision, nullable, etc). So my question is, is there a way to query this column definition for a view, the way you can for a table? How do the GUI tools do it?

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• How to select view in Oracle from another connection(other user)?

  - by Adomas

  Hi, I want to select a view from my sys user, but with other connection. I need to select view DBA_USERS. Is there any way of doing so? I am new in Oracle, so maybe it is silly question, but still, I have no idea how to do it.

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• Oracle: What does `(+)` do in a WHERE clause?

  - by Jonathan Lonowski

  Found the following in an Oracle-based application that we're migrating (generalized): SELECT Table1.Category1, Table1.Category2, count(*) as Total, count(Tab2.Stat) AS Stat FROM Table1, Table2 WHERE (Table1.PrimaryKey = Table2.ForeignKey(+)) GROUP BY Table1.Category1, Table1.Category2 What does (+) do in a WHERE clause? I've never seen it used like that before.

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• How to insert custom date time in oracle using java?

  - by shree

  Hi i have a column (type date).I want to insert custom date and time without using Preparedstatement .i have used String date = sf.format(Calendar.getInstance().getTime()); String query = "Insert into entryTbl(name, joinedDate, ..etc) values ("abc", to_date(date, 'yyyy/mm/dd HH:mm:ss'))"; statement.executeUpdate(query); but am getting literal doesnot match error. so even tried with "SYSDATE".Its inserting only date not time.So how to insert the datetime using java into oracle?please any one help..

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• Is using joins in select clause slow in Oracle?

  - by gniquil

  I would like to write a query like the following select username, (select state from addresses where addresses.username = users.username) email from users This works in Oracle (assuming the result from the inner query is unique). However, is there a performance penalty associated with this style of writing query?

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• Can compilation of several Oracle Pl/SQL package be an atomic operation?

  - by Alexey Kalmykov

  If I deploy N pl/sql packages to Oracle DB, can I make their compilation atomic i.e. the changes in these packages will be applied after the successful compilation of all packages?

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• What are the BIN$... tables in Oracle's ALL_TAB_COLUMNS table?

  - by Aaron Digulla

  When I query ALL_TAB_COLUMNS in Oracle, I see tables called BIN$frKctA83wMPgQEOSh0Az+A==$0 BIN$frKctA8cwMPgQEOSh0Az+A==$0 BIN$frQ1pdU2TgXgQEOSh0APxA==$0 BIN$frQ1pdVGTgXgQEOSh0APxA==$0 There is no corresponding entry in ALL_TABLES. What are those?

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• Oracle query nnnnnnnnnnnn

  - by kunj raman singh

  Hi, Please help me to achieve the below problem: I am having one "view" in the Oracle database,I want the output of that view and store that output in the .txt file on some other folder in UNIX box. The output which is generated from view is a report and I want to save that report in .txt format in one folder on UNIX box.Oracle is present on the UNIX box.

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• JPA: How do I get a scalar result of type Long-- not BigNumber-- from Oracle NUMBER?

  - by rektide

  The default mapping from an Oracle NUMBER value is into BigNumber... How can I get a scalar result query to return a Long instead?

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• When would isSearchable return false for an Oracle JDBC column?

  - by Ian Varley

  In what cases would a call to java.sql.ResultSetMetaData.isSearchable(int col) return false for an Oracle database? The documentation for the method doesn't really answer the question: "Indicates whether the designated column can be used in a where clause." I can think of only one case - when the column is the result of an aggregate function (in which case it would have to be part of a HAVING filter, not a WHERE filter). Are there any other cases?

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• oracle index for string column - does format of data affects quality of index?

  - by Jayan

  We have following type of "Unique ID" column for many tables in the database (Oracle). It is a string with following format <randomnumber>-<ascendingnumber>-<machinename> So we have some thing like this U1234-12345-NBBJD U1234-12346-NBBJD U1234-12347-NBBJD U1234-12348-NBBJD U1234-12349-NBBJD The UID value is unique, we have unique index on them. Does the following format is more efficient than above for index scans? NBBJD-U1234-12345 NBBJD-U1234-12346 NBBJD-U1234-12347 NBBJD-U1234-12348 NBBJD-U1234-12349

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• how to create unique keyword in the oracle db?

  - by murali

  hi, i am using autocomplete with oracle Db,how to create unique keyword for the table. KEYWORD VARCHAR2(100) COUNT NUMBER(18) how can i make as unique can plz tell the query

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• Oracle: How can I know a table is getting populated?

  - by Tami

  Hi, I'm in charge of an oracle db where we don't have any documentation (at all). And at the moment I need to know HOW a table is getting populated. Ideally, I'd like to know from which procedure, trigger, whatever... this table gets its data from. Any idea would be much appreciated. Thanks.

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• apex button to call a page in another application

  - by jaykio77

  I have a workspace with which I have 5 applications based on same schema. Now I want to have a main page from where I could call main pages of all these applications. I used this syntax to call home page in another application but to no avail f?p=4000:4150:&APP_SESSION. Where 4000:4150 are the values for the application and the page I want to display. Please let me know where am I making mistake.

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• How to authenticate a user/application combination in Oracle?

  - by Martin R-L

  I'd like to authenticate the user/application combination, not only the user. The scenario is that we've built an app that guides the user to safe updates of some data. If the same user installs PL/SQL Dev, Toad, or any other Oracle management tool, she can edit the data in ways that the app prohibits.

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• How do I backup Oracle database (about 1TB size) in VMware without using RMAN?

  - by vaishalee

  It's been a while since I am struggling to find a backup solution for cold backup of Oracle database on Linux in VMware. I am obviously not looking for entire vm image backup.

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• How do the different services in Oracle SOA relate to each other?

  - by Zubair

  I'm am trying to figure out how the Oracle "Layered Architecture Model" works, and I am very confused about what the business, data, and presentation do, and how they relate to each other. I have seen many diagrams showing how this should work, but some real world examples would be useful?

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• How do you find out which database links are used in queries for the Oracle RDBMS?

  - by JavaRocky

  I would like to find out if any and which database links are being used, for a schema, and in which tables. Is it possible via the data dictionary somehow? Is this possible with the Oracle RDBMS?

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• Where can I get SQL for default Oracle's "HR" schema?

  - by Dmitry

  I'm studying Oracle database and have to do some exercises with default "HR" schema. But I think that data in my tables is changed from default values (many students have access to DB and may be someone changed data). Where can I get SQL to construct default "HR" schema?

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• How to intregrate an oracle database with an asp.net web application?

  - by Priyaa Muthuraman

  How to intregrate an oracle database with an asp.net web application?... Any good tutorial to start with?

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• Actual SQL statement after bind variables specified

  - by bioffe

  I am trying to log every SQL statement executed from my scripts. However I contemplate one problem I can not overcome. Is there a way to compute actual SQL statement after bind variables were specified. In SQLite I had to compute the statement to be executed manually, using code below: def __sql_to_str__(self, value,args): for p in args: if type(p) is IntType or p is None: value = value.replace("?", str(p) ,1) else: value = value.replace("?",'\'' + p + '\'',1) return value It seems CX_Oracle has cursor.parse() facilities. But I can't figure out how to trick CX_Oracle to compute my query before its execution.

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• Oracle dual table

  - by Avg

  Is there any way to create / recreate dual table in oracle. It was accidentaly dropped from oracle database.

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• move data in bulk from oracle to SQL database

  - by Soja

  Hi All... Would like to know which is the best way to move data in bulk from oracle to SQL database programmatically in VB.NET application.This application is suppose to run continuously and moves data from Oracle to SQL whenever data comes. I have found OPENDATASOURCE but does not know the exact syntax. Can someone help me out. Thanks in advance,

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• Oracle: how to UPSERT (update or insert into a table?)

  - by Mark Harrison

  The UPSERT operation either updates or inserts a row in a table, depending if the table already has a row that matches the data: if table t has a row exists that has key X: update t set mystuff... where mykey=X else insert into t mystuff... Since Oracle doesn't have a specific UPSERT statement, what's the best way to do this?

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• how to write oracle two instance information in single query?

  - by rsaravanakumar

  i using oracle 10g database, i installed two instance in my machine(dev and dev10g), i using query "select instance_name,status from v$instance" this query return one instance information but i need two (dev and dev10g) instance information, how i write a query. it is possible without using dblink. pls help me.

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