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Does Oracle 11g client work for 12c database?
You need an Oracle client to access an Oracle database from Toad Data Point. Note 2: This example will detail an Oracle 12c 64 bit install on Windows 10 for an Oracle 12c instance with a PDB. Note 3: The Oracle 11g client install is almost exactly the same as the Oracle 12c client install.
What is backward compatibility in Oracle database?
Oracle supports backward compatibility so that you do not have to undertake expensive changes when a feature becomes obsolete. For example, Oracle 11g supports dictionary managed tablespaces only for backward compatibility, nobody uses them anymore for new databases.
Can Oracle 11G and 12C coexist?
Yes, it is possible. Oracle Database supports multiple Oracle homes. You can install this release or previous releases of the software more than once on the same system, in different Oracle home directories.
What are the versions of Oracle?
Currently, the latest Oracle versions include 11G, 12C, 18C, and 19C.
What is Optimizer_features_enable in Oracle?
OPTIMIZER_FEATURES_ENABLE acts as an umbrella parameter for enabling a series of optimizer features based on an Oracle release number. For example, if you upgrade your database from release 11.1 to release 12.1, but you want to keep the release 11.1 optimizer behavior, you can do so by setting this parameter to 11.1.
Is Oracle 11.2 still supported?
Details. Premier Support for Oracle Database 11.2. 0.4 database running in Oracle Database (DBCS), Exadata Cloud@Customer, and Exadata Cloud Service will end on March 31, 2021. This will allow you more time to upgrade to a newer release such as Oracle Database 19c.
Can I have 2 Oracle clients?
You can have multiple versions of the same product or different products running from different Oracle homes concurrently. Products installed in one home will not conflict or interact with products installed in another home.
Why is my Oracle database not compatible with 12 C?
If you do not set the COMPATIBLE initialization parameter to 12.2.0, then you cannot use the new Oracle Database 12 c release 2 (12.2) features, because your upgraded database is not running in the required COMPATIBILITY setting for Oracle Database 12c features.
Can a database be downgraded to Oracle 12 C?
Only a subset of Oracle Database 12 c features are available while the COMPATIBLE initialization parameter is set to a lower value. After you increase the COMPATIBLE parameter, the database cannot be downgraded. Parent topic: What Is Oracle Database Compatibility?
When to use Oracle 12 C release 2?
This recommendation configuration is not strictly required. For example: If your client software is Oracle 12 c release 2 (12.2.0.1), then if you run precompiler applications on the client against, the server, Oracle recommends that your server software is Oracle 12 c release 2 (12.2) or later.
When to increase the compatibility parameter in Oracle?
Oracle recommends increasing the COMPATIBLE parameter only after you have completed testing the upgraded database. After the upgrade is complete, you can increase the setting of the COMPATIBLE initialization parameter to the maximum level for the new Oracle Database release.