IOT

IOT Index IOT stands for Index Organised Table in oracle database.The idea behind an IOT is simple. You hold all the data for the table in the ordered structure of an index. Why do we use IOT? An IOT has the structure of an index and stores all the columns of the row, accesses via […]

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Upgrade Oracle 11gR2 (11.2.0.4) database to 12cR2 (12.2.0.1)

Here I would be discussing how to upgrade Oracle 11gR2 (11.2.0.4) database to Oracle 12cR2 (12.2.0.1) on the same server. This upgrade process was done on Linux 6 (x86_64). I used DBUA (Database Upgrade Assistant) to perform this upgrade. DBUA is also a recommended way to perform the upgrade as it would automate almost everything […]

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Oracle Database 12c Release 2 (12.2) Installation On Redhat Linux 6

In this post, I’m installing the Oracle Database 12c Release 2 (12.2.0.1.0) software on Oracle Linux 6.4.  Only the software is being installed at this point, in preparation for a single database installation which I’ll create later on using the DBCA tool. First and foremost, before you start, make sure your Linux server meets the minimum […]

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Long Identifiers In Oracle 12.2

SQL*Plus now supports object lengths of 128 bytes. In previous releases, the object length limit was 30 bytes and if you try to create object with length more than 30, it will throw error as ORA-00972: identifier is too long. Oracle 12.2 increases the maximum size of most identifiers from 30 to 128 bytes, which […]

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spool CSV in Oracle 12.2

Now we can spool spool CSV or JSON from Oracle Database. Prior to 12.2 , we can spool as text or html, but from 12.2 onward, the SET MARKUP command now has a CSV option to output data in CSV format. Syntax CSV {ON|OFF} [DELIMI[TER] character] [QUOTE {ON|OFF}] Traditionally you wiill get formatted output (without […]

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Size of Oracle Database

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Oracle Database 12cR2 (12.2) On-Prem

Finally Oracle Database 12cR2 (12.2) On-Prem is available. Previously it was available only on cloud services. You can download it from eDelivery or OTN. Good Thing is that , now only zip file for Database Home as well as Grid Home. Prior to 12.2, There are 2 zip files for each of them. We can […]

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Query shows clients connected to all the Flex ASM instances

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SQL*Plus History In Oracle 12.2

In Oracle 12.2, SQL*Plus can keep the history of the commands executed. You can enable or disable the HISTORY command in the current SQL*Plus session by using the SET HISTORY command. The history feature is not enabled by default, so after you start SQL*Plus, you need to enable history by running “set hist[ory] on”

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