Below, I have prepared a list of the most common database modeling interview questions, along with their correct answers. These questions give you an idea of how to prepare for an interview. But let me warn you
Use the buffer cache advisory over a given workload and then query the v$db_cache_advice table. If a change was necessary then I would use the alter system set db_cache_size command. Read More 25:: Explain an ORA-01555 You get this error when you get a snapshot too ...
A database administrator must understand the technical components of a database, including SQL scripts and queries. The goal of the question is to evaluate the candidate's expertise in SQL, structured query language, which is essential to a database framework. What to look for in an answer: ...
1: SELECT – to…… data in the database a-delete b-queryc-update d- – insert 2: INSERT – to ….. data into a table a-insertb-query c-update d- delete 3:UPDATE – to …… data in a table a-delete b-updatec-query d- insert 4:DELETE – to ….. data from a table a-...
Self-join is query used to join a table to itself. Aliases should be used for the same table comparison. 25. What is Cross Join? Cross Join will return all records where each row from the first table is combined with each row from the second table. ...
contrast, virtual ports are also present on your computer. Virtual ports give computers the ability to run applications and “listen” for connections from external computers. Virtual ports are used by SQL Server to run your database query and listen for application and external computer connections...
When using Database Visibility, it is possible to configure custom metrics from a query. Which of the following are the permissible return types of a query? Choose two. A). Integer B). Integer, Boolean C). Float D). String, Integer ...
1. Please write a query based on T1 and T2 which produces: ColA ColB 1 10 2 20 3 20 3 30 4 30 4 40 5 30 5 50 6 30 6 60 (Hint: the result set is produced from merging T1 and T2 together, without duplicate values)
Create Database Drop Database Select Database Data Types Create Tables Insert Query Select Query Mysql miscellaneous Where Clause Update Query Delete Query Sorting Results Using Join NULL Values Transactions Alter Command Indexes Database Info Using Sequences Which...
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