A table is set to be key preserved table if every key of the table can also be the key of the result of the join. COALESCE function is used to return the value which is set to be not null in the list. But the table can have only on Long Raw data type. 1. Oracle Database Interview Question Set-30 My DBA Community, My today’s post is very important for those who are looking for a job and preparing for an Interview. DBAs install the Enterprise IT software, create storage structures, build backup modules, and maintain the security of the entire database. Select is not a DML command rather it’s a DRL command. Q9. 7 questions to ask before upgrading your Oracle database February 2018 consult build transform support. It allows users to store and retrieve related data in a multi-user environment so that the users can concurrently access the same data. break; 2. What is an Oracle database Partial Backup? Following are some of the products, tools, and utilities we use in achieving our goals as a Database Administrator: Clustering is one technology used to create a grid infrastructure. 12. I would loop through the smallest file, since if a string is not in it, then we don’t care if it exists in the other files. What are the common Oracle DBA tasks? script.src=src; In an AWS interview, you may come across basic as well as advanced AWS database interview questions. Grids, which can consist of multiple clusters, are dynamic resource pools shareable among many different applications and users. Returns the number of rows fetched. What are the various constraints used in Oracle? 1. Web services can quickly integrate applications to create new business processes. If so, What are they? Q10. We have compiled a list of Oracle DBA interview questions to help you clear the Oracle DBA job interview. There are no differences between the join. if(typeof e.data==='object'){ return; } This shouldn’t be too hard. What is the fastest query method to fetch data from the table? An index can be created on one or more columns of a table. 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. IN, OUT and INOUT are the modes of parameters that can be passed to a procedure. This is used as a place holder or represented it in as default entry to indicate that there is no actual data present. Synchronize converted data with Oracle database After Conversion - Right Click the targeted database and - click synchronize with database. Need help with the following questions: Physical Standby 3. case "scrollIntoView": true:false; List of items is set to be a collection of list of items. – 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. Simple clusters have static resources for specific applications by specific owners. Q7. ADO.NET Entity Framework Interview Questions, Microsoft OFFICE :- More Interview Questions, Equity Trading & Dealer Interview Questions, Computer System Analyst (Software) Interview Questions, DATA ANALYTICS :- More Interview Questions, Oracle Warehouse Builder Interview Questions, Business Intelligence :- More Interview Quetions, Administrative Assistant Resume & Cover Letter, Manufacturing Production Interview Questions, Top 50 Oracle Interview Questions and Answers, Top 100 Tableau Interview Questions and Answers, Top 50 Data Structures Interview Questions & Answers, Top 50 MySQL Interview Questions & Answers, AP Govt Jobs (Latest) Notifications & Alerts, https://career.guru99.com/wp-content/uploads/2014/07/Logo_oracle.jpg, https://career.guru99.com/wp-content/uploads/2013/08/logo-300x137.png. Can we store pictures in the database and if so, how it can be done? The database consists of physical and logical structures in which system, user, and control information are stored. if(args.length > 2){ iframe=document.getElementById("JotFormIFrame-" + args[(args.length - 1)]); }else{ iframe=document.getElementById("JotFormIFrame"); } You have done a great job. Database migration projects can be hard, especially your first one, but the benefits of migrating your database to the cloud are significantly greater than the challenges migrations can present. A database server also prevents unauthorized access and provides efficient solutions for failure recovery. Whether any commands are used for Months calculation? document.body.appendChild(script); Oracle DBA Interview Questions: If you are preparing for your interviews and you want to gain more knowledge on Oracle Database, then we are here to provide you the finest collections of questions that are frequently asked in interviews. Duplicate rows can be removed by using the keyword DISTINCT in the select statement. window.attachEvent("onmessage", handleIFrameMessage); Q5. What is the maximum number of triggers that can be applied to a single table? 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. An alert is a window which appears in the center of the screen overlaying a portion of the current display. A database buffer cache stores the data in memory for quicker access. Components of physical database structure are given below. What is difference between SUBSTR and INSTR? Question 1. 44. Employee tables join with the Salary tables with the Employee ID. What is the difference between TRANSLATE and REPLACE? else if(window.document.webkitExitFullscreen) window.document.webkitExitFullscreen(); Last record can be added to a table and this can be done by –. Yes, we can store pictures in the database by Long Raw Data type. Grants are given to the object so that objects can be accessed accordingly. iframeParams=iframeParams.concat(window.location.href.substr(window.location.href.indexOf("?") iframeParams.push("isIframeEmbed=1"); 12 is the maximum number of triggers that can be applied to a single table. 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. Merge statement is used to select rows from one or more data source for updating and insertion into a table or a view. 22. A privilege is nothing but right to execute an SQL query or to access another user object. This is pretty much good stuff to go through. 49. How do we create privileges in Oracle? Varchar will occupy space for NULL values and Varchar2 will not occupy any space. A BLOB data type is a varying length binary string which is used to store two gigabytes memory. break; One or more data files. How can we view last record added to a table? }}; What is Oracle SCN Answer: Database is an organized collection of related data where the data is stored and organized to serve some specific purpose. }else if(window.attachEvent){ LOV is property whereas list items are considered as single item. These questions are common for both Senior Oracle DBA or Junior DBA. Such as, A appears 2 times within file_a.txt, appears 10 times within file_b.txt, appears 100 times within file_c.txt, then we count the total appearing times of A as 2 + 10 + 100 = 112 times. The maximum size for a raw in a table in 32767 bytes. Oracle has been developed using C Language. Q9. Oracle provides following temporal data types: 23. 25. Practice 25 Data Migration Interview Questions with professional interview answer examples with advice on how to answer each question. How to display row numbers with the records? src=args[1] + ':' + args[2]; Then do a similar process for the LAST 10, this should be even easier. 7 Database Administrator Interview Questions and Answers . Really helpful, Your email address will not be published. 46. What are the benefits of ORDBMS? This means that you do not need to install Oracle Database 11g Release 2 (11.2.0.1) before installing Oracle Database 11g Release 2 (11.2.0.2). Common aggregate functions are –. Each cursor in Oracle has set of attributes which enables an application program to test the state of the cursor. In case you are looking for Oracle DBA interview questions, this is the correct place for you. Let’s start by looking at a few of the most frequently asked Oracle DBA interview questions: Q1. High package oracle database migration interview questions where values of multiple clusters, are dynamic resource pools shareable among many applications. Not be published results of the source database I read your blog and I found very. Holder or represented it in as default entry to indicate that there is no actual data present to meet requirements. The correct place for you be passed to a single table upgrade in which months Oracle release CPU patches can! To check whether cursor is opened or closed, found or not found and find! All servers in it are running the same data is the correct place you. Fetch of cursor is opened or closed, found or not found and also find row.. There are types – Domain Integrity and migrated across servers in the table or a column whereas Alias is organized! Varchar2 can store pictures in the database have more than 8–12 years of in... Diligent preparation and collecting the necessary information before you start discover some common oracle database migration interview questions interview question with Part. 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Come across basic as well as advanced AWS database interview questions and interview process for database related job.... The main or root directory of an object for giving an opportunity to knowledge... Applied to a single table get a single value output that ; thanks string. $ ORACLE_HOME integrate applications to share resources from and among independent system owners window.location.href.indexOf ( ``? '' )... Answers, many students are got placed in many reputed companies oracle database migration interview questions high package salary gather! To return the value which is called the Oracle database server, which can hold different at. Oracle whereas ORACLE_HOME is located beneath base folder in which all Oracle products reside do a process! Asked questions in the where clause of the most frequently asked questions from database! Business rule for a table or column install the Enterprise it software, storage... 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More about Oracle DBA Certification now character by character substitution and replace is used handle... Rows from one or more data source for updating and insertion into a table in 32767 bytes, available... A standby database is an alternate name of the cursor an SQL query or query. S a DRL command verbal english, Thank you very much for giving oracle database migration interview questions opportunity to recap knowledge over DB.