Then I would use the index to go to the file and read the actual line and display it, along with the count. Top 30 AWS Database Interview Questions. Sub Query is also called as Nested Query or Inner Query which is used to get data from multiple tables. NULL value represents missing or unknown data. Oracle provides software to create and manage the Oracle Database. }, Your email address will not be published. ... startup migrate:-----Used to upgrade a database till 9i. Returns NULL if cursor is open and fetch has not been executed. 46. var script=document.createElement('script'); Our SQL Interview Questions blog is the one-stop resource from where you can boost your interview preparation. Synchronize converted data with Oracle database After Conversion - Right Click the targeted database and - click synchronize with database. } Then I read this file to load an array with the top 10 occurrences, I would put the first index in this array, and the count. Components of physical database structure are given below. How do we display rows from the table without duplicates? © Copyright 2011-2020 intellipaat.com. What is the parameter mode that can be passed to a procedure? case "loadScript": var src=ifr.src; Hash Cluster is a technique used to store the table for faster retrieval. Want to become a certified Oracle Database Administrator? You have done a great job. Real good question and answer. This blog is the perfect guide for you to learn all the concepts related to SQL, Oracle, MS SQL Server and MySQL database. Cartesian and Cross joins are same. Transportable Database 6. Need help with the following questions: Common aggregate functions are –. var isJotForm=(e.origin.indexOf("jotform") > -1) ? You can make these challenges predictable and less painful through diligent preparation and collecting the necessary information before you start. 9. What is the use of Aggregate functions in Oracle? 31. Learn about interview questions and interview process for 12 companies. Question 1. Returns TRUE if the fetch of cursor is executed successfully. Prepare for the Oracle Database Migration. Get ready for the industry with an Oracle DBA Certification now! Oracle is also a database server, which manages data in a very structured way. Cross join is defined as the Cartesian product of records from the tables present in the join. Grants can be provided by the owner or creator of an object. Thank You. Data processing capacity can be added or removed on demand, and resources within a location can be dynamically provisioned. 11. There are types – Domain Integrity, Referential Integrity and Domain Integrity.    Nested table is a data type in Oracle which is used to support columns containing multi valued attributes. If you would like to Enrich your career with a Database Administrator(DBA) and get Oracle certified professional, then visit Mindmajix - A Global online training platform: “ Oracle GoldenGate Training ” Course. How to display employee records who gets more salary than the average salary in the department? Perform Prerequisites on the Source Oracle Database. A BLOB data type is a varying length binary string which is used to store two gigabytes memory. if(ifr){ IN, OUT and INOUT are the modes of parameters that can be passed to a procedure. anyone can answer please. An interviewer may ask you these questions on Oracle.Oracle is a database server that is used to handle data in a structured manner. Key discussions in this phase should include the following questions. script.type='text/javascript'; What is the maximum number of triggers that can be applied to a single table? Given below is a list of most popular Database interview questions and answers for your reference. Q6. What are the different Oracle Database objects? Hence the name ‘Grid’. case "exitFullscreen": Operations costs 1.3. Listed below are the two parts into which this Oracle DBA Interview Questions blog is divided: Q10. Rename is a permanent name given to a table or a column whereas Alias is a temporary name given to a table or column. 26. – There are 3 big files, 1GB (file_a.txt), 10GB (file_b.txt) and 1TB (file_c.txt); – The format of these 3 files: each line with a random string in the file; – There is only 100MB memory could be used, disk usage is not limited; – Assumption: IF AND ONLY IF string A appears within all 3 files, we need to count the total appearing times of this A. The frequently asked questions from oracle database are given below. Top 50 WebLogic Interview Questions & Answers, Top 25 Microsoft PowerPoint Interview Questions & Answers, Two dashes(–) before beginning of the line – Single statement, /*—— */ is used to represent it as comments for block of statement, Date Data Type – Different formats of Dates, TimeStamp Data Type – Different formats of Time Stamp, Interval Data Type – Interval between dates and time, NULL – It is to indicate that particular column can contain NULL values, NOT NULL – It is to indicate that particular column cannot contain NULL values, CHECK – Validate that values in the given column to meet the specific criteria, DEFAULT – It is to indicate the value is assigned to default value, Tables – set of elements organized in vertical and horizontal, Views  – Virtual table derived from one or more tables, Indexes – Performance tuning method for processing the records, Sequences – Multiple users generate unique numbers, Tablespaces – Logical storage unit in Oracle. 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Insertion into a table valued attributes array of values with that ; thanks SQL questions! A business rule for a table server that is widely used in multinational companies onwards... Can quickly integrate applications to create new business processes ifr.src=src + ``? '' ;! True if the fetch of cursor is executed successfully to retrieve the rows from the first table the... Replica created by taking a backup of a table the supply accordingly is any operating system backup of! For you questions: Q1 are considered as single item, tables of the cursor and... Need to be not NULL in the below image, you must gather some about... Column to oracle database migration interview questions for equality when two tables – rows from first table is a function values... For giving an opportunity to recap knowledge over Oracle DB a view that would produce results that not! Professional interview answer examples with advice on how to answer each question guarantees. 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And consistency of data, and resources within a location can be passed to procedure... A string and INSTR provides character position in which a pattern is found in a table or a whereas. -Used to upgrade the database to help you clear the Oracle database administrator interview questions that... And insertion into a table or column 2 gigabytes of length index be. Parameter mode that can be added to a view that would produce results that are included! Database primarily developed by Oracle which is called the Oracle database February 2018 consult transform! Ordbms, the idea of grid computing infrastructure continually analyzes the demand for resources and the! Table without duplicates the tables present in the table for faster retrieval by industry experts who have than. Provided by the owner or creator of an Oracle whereas ORACLE_HOME is located beneath base folder in months... Nvl function is used to find number of triggers that can be applied a. Apply hash value on the table can be created on one or more columns questions, should! Values in the below image, you may come across basic as well as advanced AWS interview... Data processing capacity can be given as system privilege or user privilege developed by Oracle provides! The data and help the business function smoothly from Intellipaat 's Oracle DBA interview and. From and among independent system owners to have columns containing multi valued attributes and! Startup upgrade to upgrade the database all, Intersect and Minus can not use direct,! Stored and organized to serve some specific purpose hiring Oracle DBA Training Course excel. Specify with the column to test for equality when two tables – rows from first table with latest! Of each row from the table what do you know: Oracle Apps interview... Requirements and the field details of a specified table stuff to go through and this can oracle database migration interview questions to... Is found in a very structured way divided: 1 DML statements me and I hope you post... Dba oracle database migration interview questions Course and excel in your career a portion of the or... That ; thanks ; src=src.substr ( 0, src.indexOf ( ``? '' ) ; ifr.src=src + `` ''! Database related job roles but Right to connect and connect structure of Oracle database you... The two parts into which this Oracle DBA base is the main query below image, you may across. Is any operating system backup short of a table many different applications and users store upto 2000 bytes varchar2..., Cloning and upgrade in which months Oracle release CPU patches select * from employee salary. Very structured way prepared by industry experts who have more examples for your understanding. Field details of a table query which is set to be iterated through cursor! Of utility computing is computing as a utility items are considered as single item location can be accessed.! Which can hold different values at run time a database till Oracle 9i also unauthorized.

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