Finding islands are classic problems in PL/SQL. The basic concept is that you have some sort of numbers, like these: 1, 2, 3, 5, 6, 8, 9, 10, 15, 20, 21, 22, 23, 25, 26. The islands problem involves identifying ranges of existing values.
Finding gaps is classic problem in PL/SQL. The basic concept is that you have some sort of numbers (like these: 1, 2, 3, 5, 6, 8, 9, 10, 15, 20, 21, 22, 23, 25, 26), where there’s supposed to be a fixed interval between the entries, but some entries could be missing. The gaps problem involves identifying the ranges of missing values in the sequence. For these numbers, the solution will be as follows:
First, run the following code, to create tab1 table:
CREATE TABLE tab1
So many fresher Oracle DBAs and intermediate Oracle DBAs are searching online Oracle DBA interview Questions but unfortunately they are getting older and theoretical questions about Oracle basics. If you will prepare yourself from those content then you might get trouble to crack technical interview.
You need to prepare yourself about technical interview with consideration of recruiter company’s requirements. In most of cases, interviewer will ask questions about their own requirements.
Please find the installation steps for ORACLE 12C Database.
Blog consists of step by step procedure to install the 12C DB. Screenshots helps you to select the options easily through out the installation.
Get the hands on experience with installation and working with 12C database.
I have tried the GoldenGate Software for data replication. I would like to share the steps to one who is really looking for Goldengate replication steps.
I feel its a simple if we think it is simple, If we think its complicated, it is really a complicated. Start with a mindset that you can achieve it.
I have seen articles that misrepresent a Flex Cluster, even this book Expert Oracle RAC 12c which is written by people who know better (Oracle ACE directors, an OCM, an Oak Table member) gets it wrong, because of a reliance on beta documentation.
In earlier releases, running a shell script from the Scheduler was awkward. Oracle has realized this, and introduced a new job type in 12c that makes it simple.
One often sees requests for test cases, typically when a user has a SQL performance issue. So many users appear to have problems with producing a suitable test case that Uncle Oracle provides routine to automate this. There are no longer any excuses for not providing a test case. Here is an intro to how to do it (code tested on 18.104.22.168 and 22.214.171.124).
The inverted table format can deliver fast and flexible query capabilities, but is not widely used. ADABAS is probably the most successful implementation, but how often do you see that nowadays? Following is a description of how to implement inverted structures within a relational database. All code run on Oracle Database 12c, release 126.96.36.199.
There are three restrictions on indexing and partitioning: a unique index cannot be local non-prefixed; a global non-prefixed index is not possible; a bitmap index cannot be global. Why these limitations? I suspect that they are there to prevent us from doing something idiotic.