Sub-queries are often referred to as sub-selects, as they allow a SELECT statement to be executed arbitrarily within the body of another SQL statement. A sub-query is executed by enclosing it in a set of parentheses. Sub-queries are generally used to return a single row as an atomic val...
The data modeler designs, implements, and documents data architecture and data modeling solutions, which may include the use of relational, dimensional, and NoSQL databases. These solutions support business-critical applications such as enterprise information management, business intelligence, machine learnin...
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: ...
Look at the explain plan with utlxplp.sql or utlxpls.sql Read More 24:: How would you go about increasing the buffer cache hit ratio? 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 wou...
a-delete b-updatec-query d- insert 4:DELETE – to ….. data from a table a-query b-update c-insert d-delete 5:Literals are …… that are used inSQL statements. a-constantsb-variables c-Vowel 6:Table Nameis the name of an ……….. database table or view that you have access...
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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...
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Expect this SQL Interview Questions as a part of an any interview, irrespective of your experience. Properties of the transaction can be summarized as ACID Properties. 1. Atomicity A transaction consists of many steps. When all the steps in a transaction get completed, it will get reflected in...
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