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...
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 wo...
The number of shards should be as few as possible, and the shards should be distributed evenly on multiple DataHosts as much as possible, because the more a query SQL spans across shards, the worse the overall performance, although it is better than the result of all data in one shard, ...
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sql-server interview sql-query database-management interview-questions sql-database sql-statements database-table drop-table interview-preparation database-relations Updated Jan 10, 2024 MonetDB / MonetDB Sponsor Star 380 Code Issues Pull requests This is the official mirror of the MonetDB Merc...
An ideal response would be that SQL databases are relational database systems that use Structured Query Language for manipulating as well as defining data. They are a better fit for complex transactions and queries. On the other hand, NoSQL databases are non-relational, and they are designed fo...
I am trying to master SQL queries and i have downloaded the AdventureWorks Database.I am looking for some Websites which would have exercises or query samples on Adventureworks by which i can improve my SQL skills. I would be very much thankful to people who would help me with regards to...
mysqlsqlsql-serverdatabasemysql-serverquery-enginerelational-databasesql-engine UpdatedOct 16, 2024 Go SQLSync is a collaborative offline-first wrapper around SQLite. It is designed to synchronize web application state between users, devices, and the edge. ...