the designing.making/deploying/management of a distributed database?
or do i need to buy the versions for the above?
if it 10g express has this support, will there be a central point to which my web application will connect, or do i have to write connection strings to connect to each server making "the distributed database "
please also refer to this post
Oracle distributed databases and MSVC
Oracle Express Edition is limited to a single CPU and 4GB of data on a single server. That's why it's free. If you want to use it in a distributed configuration you will have to write the glue yourself.
Related
What are the supported clients and client versions for Oracle Autonomous Database?
Any connection type supported by Oracle Net Services can be used to connect to Autonomous Database.
Oracle Call Interface (OCI) connections require installing the Oracle client software. For these connections, Oracle Database Client 11.2.0.4 (or higher) or the Oracle Instant Client 12.1.0.2 (or higher) are supported by Autonomous Database.
For JDBC Thin connections, the only requirement is to have JDK8 (or higher) installed.
You can also connect to Autonomous Database using the Oracle supplied tools such as Oracle SQL Developer (version 18.2 or higher recommended)and Oracle SQLcl.
Some of these clients and tools such as JDBC, SQL Developer, and SQlcl support TLS authentication without using any wallet; hence making life much easier as opposed to mTLS authentication, which requires a wallet. I definitely recommend checking out the TLS option without a wallet in ADB since it has several advantages as described in this blog post.
Another great option is Oracle Database Actions if you don't want to worry about supported versions, installing a client, whether to use a wallet or not. Database Actions is a web-based interface that uses Oracle REST Data Services to provide executing your SQL statements and scripts, creating Data Modeler diagrams, developing RESTful web services, managing JSON collections, and using the Data Load, Catalog, Data Insights, Business Models, and Data Transforms tools to load data from local and remote sources, view data in your tables and views, view objects in your data dictionary, and organize, analyze, and transform your data. You can access Database Actions from the ADB details page of your instance in Oracle Cloud Infrastructure console:
I also recommend referring to the documentation for more details on supported clients, client versions, and connection methods.
Disclaimer: I’m a Product Manager at Oracle.
TL;DR:
Is there a way to connect to an Oracle DB via JDBC without the Oracle JDBC driver? Or any other way (e.g. hibernate)?
Full story:
We have an existing Spring Boot app, which connects to an Oracle 11c database instance using OJDBC driver. Spring Boot internally uses JdbcTemplate to execute a few inserts and selects, basically 5 or 6 type of statements. Technically it is working fine.
However we are in an interesting situation, the code we built has to pass through a series of checks (we are working as subcontractors under a larger international company), and part of these checks is a license inspection. BlackDuck (https://www.blackducksoftware.com) is used to report every single library which is linked in the solution (around 280 in our case), and we had to manually add the copyright statement to each (for example: "Copyright © 2005-2019 The Apache Software Foundation. All Rights Reserved."). We added the Oracle Technology Network license to the Oracle Driver, and it was rejected by the legal team of the international company:
"Unless we are actually licensed to use an Oracle database (which you are not), we cannot allow the use and distribution of the Oracle JDBC drivers. Those drivers are licensed under the Oracle Technology network license and it obligates XXX [company name] to designate Oracle as a 3rd party beneficiary, which is not something our legal department allows. You must therefore find a compatible replacement that is licensed under open source."
Now, we are obviously trying to get around this thing (seeing as the end client who is receiving the solution has a licensed Oracle DB installed, and we can see earlier versions of the OJDBC driver in the company's Nexus repository), but I wanted to ask, is there a way to connect to an Oracle DB via JDBC without the Oracle JDBC driver? Or any other way (e.g. hibernate)? To my knowledge, Oracle DB communication protocol is not fully standard, that's why you need the Oracle drivers. Is there an open source alternative that I don't know of?
Oracle DB communication protocol is not only "not fully standard", there is simply no SQL or JDBC standard for any on-the-wire communication protocol for SQL databases, they are all proprietary.
There is no open-source alternative that I'm aware of, and there couldn't be without Oracle's help as the protocol is not publicly specified as far as I know. We solved a similar problem by having our customers with an Oracle license add the driver to their deployment of our app, that way we didn't redistribute it, and they were the ones who used it.
Yes, use someone else's driver. Progress makes one for example.
I'm not speaking on behalf of Oracle in terms of the quality of THIS driver or the legal terms concerning your decision to not use our driver. However, there are alternatives to our driver for Java applications, and this is one of them.
we had one SSIS package with Oracle 11 Client, we would run our daily query with 30min to 1 hour run time.
we had to upgrade our oracle clients as one of our other oracle source got upgraded.
post upgrade to Oracle 12c, our daily job run time increased.
oracle DBA said, its not running in parallel, as its occupying only one processor.
when we run the same query from SQL Developer or toad, its running in parallel. but if we run from SSIS OLEDB Source component its not running in parallel.
I'm clue less with this behavior. any solution will be helpful.
ask me more clarifications if required.
Trying to figure out the issue
I tried to search on this topic, i didn't find a lot of informations but i think it is based on the OLEDB Connection string provided in the OLEDB Connection Manager.
Check the following Oracle documentation it may give you some insights:
Features of OraOLEDB
In the link above, in the Distributed Transactions part, they mentioned that:
The DistribTX attribute specifies whether sessions are enabled to enlist in distributed transactions. Valid values are 0 (disabled) and 1 (enabled). The default is 1 which indicates that sessions are enabled for distributed transaction enlistments.
Sessions enabled for distributed transaction enlistments cannot run statements that use the direct path load and parallel DML capabilities of the Oracle database. Such statements are executed as conventional path serial statements.
I am not sure if this could help, but it is not bad to give a try.
Oracle Attunity Connectors
Instead of using OLEDB Source to read from oracle, it is better to use Oracle Attunity Connectors for SSIS which guarantee higher performance than OLEDB Source:
Microsoft Connectors By Attunity
Attunity's high speed connectors for Oracle and Teradata have been selected by Microsoft to be included with SQL Server Integration Services (SSIS).
can anyone please let me know that what limitations does oracle apex have,
limitations like Storage, RAM or other.
How long will i be able to use it without licensing the database?
Oracle APEX is a no-cost feature of the Oracle Database. If you use a free Oracle database (Oracle XE) then Oracle APEX is free to use. You can also gain free access to Oracle APEX at http://apex.oracle.com. If wish to use Oracle APEX on the cloud you can do so with Oracle Exadata Express (http://cloud.oracle.com/database) and many other database cloud services. Free cloud 1 month trials may also be available.
i found this in oracle website, and i now understand that storage differ in each version.
With respect to growing needs for storage, Oracle Database 11g XE now offers a full 11GB for user data alone, which is almost threefold increase since previous 4GB limit in Oracle Database 10g XE. Other hardware restrictions remain the same with CPU usage capped at one physical core and memory at 1GB. Oracle Database 11g XE is available immediately for Windows and Linux platforms.
Source:
http://www.oracle.com/technetwork/articles/sql/11g-xe-quicktour-498681.html
The following shows the replication capabilities as described for ms sql server on oracle
website.
"the text inside the " " are my questions/confusion AGAINST what oracle website says"
Please clear these points, what do you think? Is this article out of date?
Replication functionality in Microsoft
SQL Server or Sybase Adaptive Server
has the following characteristics:
Unidirectional "merge replication supports!!"
Table-based, not transaction-based "in transaction replication new
changes/transactions are replicated in
real time!!!"
No automatic conflict resolution (must be manual) "Really? what about
merge replication"??
Heterogeneous replication through Open Database Connectivity (ODBC)
In addition to the preceding
characteristics, Microsoft SQL Server
7.0 replication provides heterogeneous replication through ODBC.
Oracle replication has richer
replication functionality, which
includes the following:
Bi-directional
Any database object can be replicated
Automatic resynchronization
Automatic conflict resolution
Heterogeneous replication provided through gateways
Is marketing material about direct competitor accurate, up to date and unbiased? Use your brain, user287745...
SQL Server 7.0 is rather old. Since then 4 (four) more major editions have shipped (2000, 2005, 2008 and R2). If you want to read about SQL Server Replication, you better read on the MSDN site. SQL Server Replication.
Outdated. Really. or worse, whoever wrote that at oracle... left information out on purpose.