What view would you use to determine free space in a tablespace? Outer Joins: Outer Join is used to fetch rows that do not meet the join condition. How to find count of duplicate rows? Question 30 What is Normalization? If you run Union query. Using grid computing, independent hardware, and software components can be connected and rejoined on demand to meet the changing needs of businesses. Yes, a table can have many foreign keys and only one primary key. Answer: A table is set of data which is organized in to specific structured manner. It is used for : 1 Audit data modifications. Unambiguous logic must be avoided whilst overloading is being done.
It contains rows and columns similar to a real table. How can you determine which shared memory and semaphores are associated with which instance? Ans: Locking prevents destructive interaction between concurrent transactions. If the logical structure is created from single table then it is called as Simple view. By the method for this blog, we will make you mindful of the normal questions that are asked in the interview sessions relating to Oracle Database Administrator. This is an important section that you should prepare well. Affect all rows of the table including that already exist when the constraint is enabled. What is a control file? Constraints are used to set the rules for all records in the table.
These three functions work in the same way. Null value is a field with no value. They are used to monitor changes happening in the table. Here is a list of 60 interview questions about Oracle Database with their answers. Domain Index - Refers to an application Hash cluster Index - Refers to the index that is defined specifically for a hash cluster. What is the Primary key? This way you can distribute software without having to worry about exposing your proprietary algorithms and methods.
List the correct sequence of commands to process a set of records when using explicit cursors A. Ans: If we want to perform multiple operations in different tables then we must use triggering events within trigger body. Do not use a table name or alias in the referenced columns. Allows database to be recovered to a previous time to correct problems caused by logical data corruptions,user errors Question 28. Either of the forms can be hidden or displayed based on logic.
This allows moving between the forms. What is the maximum number of triggers that can be applied to a single table? What is an oracle instance? A of online data files is called an online backup. The list contains questions useful for basic, freshers and experienced oracle professionals. Zero is a number Blank space is the value we provide. Equi Join is also called Simple or Inner Joins. Integrity Constraints It can be called as a declarative way in order to define a business rule for a table's column b. Normalization is used to organize the data in such manner that data redundancy will never occur in the database and avoid insert, update and delete anomalies.
Developers should use implicit cursors with great care. Eg:a,b,c,d,e,f Change to A B C D E F 2. How to select all records from the table? Its a good practice to go through all of these questions before attending the interview. The table is a collection of record and its information at a single view. Nice to have it laid out so clearly. It tells that the entire database is to be exported.
Describe types of Constraints in brief? This datatype is used to store binary data for 2 gigabytes of length. You can invoke triggers explicitly on the table in the database. Welcome to Mindmajix - The leading global online training platform. And Row Chaining happens only when the row is being inserted and whenever it has inserted it cannot be chained. What is an Oracle index? Ans: Overload is refers to same name can be used for different purpose, in oracle we can also implement overloading procedure through package. The database comprises of physical and logical apparatuses and algorithms in which things like the system, user, and control information is stored. These are not known to other functions.
The database itself is merely that — the database; it cannot modify its own information any extra than the regular individual can re-arrange their inherited code. What is the difference between Rename and Alias? He has an extensive experience in the field of Software Testing. What is a Dual Table? Ans: A View logically represents subsets of data from one or more table. Auto increment keyword allows the user to create a unique number to get generated when a new record is inserted into a table. It determines whether indexes are imported. Tracing code is a crucial technique to measure the code performance during the runtime.
The output of Cross Join is called as a Cartesian product. Oracle Database lets you save filled groups of redo log files to one or more offline destinations, known collectively as the archived redo log. Nagar, Tambaram, Teynampet, Thiruvanmiyur, Thoraipakkam, Urapakkam, Vadapalani, Valasaravakkam, Vandalur, Velachery, Virugambakkam, West Mambalam. Group functions give results based on groups of rows, as opposed to individual rows. Join is a query, which retrieves related columns or rows from multiple tables. Subprograms and anonymous blocks can be called by other applications.