S. M. L., "High Performance SQL Queries on Compressed Relational Database," Journal of Computers, Vol. 4, No. 12, pp 1263-1274, December 2009.Bhuiyan MM, Hoque ASML. High performance SQL queries on compressed relational database. Journal of Computers, 2009, 3(12):12631274....
allowing database administrator to add, update, or delete rows of data easily. Originally known as SEQUEL, it was simplified to SQL due to a trademark issue. SQL queries also allows users to retrieve data
SQL Server 2016 enhances the AlwaysOn health diagnostics with database health detection. If AlwaysOn availability group database health detection has been selected for your availability group, and an availability database transitions out of the ONLINE state (sys.databases.state_desc), then entire ava...
To use this method with a return type that isn't natively supported by the database provider, use theDefaultTypeMapping<TScalar>(Action<TypeMappingConfigurationBuilder<TScalar>>)method. The returnedIQueryable<T>can be composed over using LINQ to build more complex queries. ...
Over time, another strength of the relational model emerged as developers began to use structured query language (SQL) to write and query data in a database. For many years, SQL has been widely used as the language for database queries. Based on relational algebra, SQL provides an internally...
We will learn what a relational database is, how it works, and why you might choose it over NoSQL alternatives.
In a relational database, an index is a data structure that lets you perform fast queries on different columns in a table. You can use theCREATE INDEXSQL statement to add an index to an existing table, specifying the columns to be indexed. After the index has been created, you can quer...
Azure SQL Database creates an IP firewall at the server-level. This firewall prevents external applications and tools from connecting to the server and any databases on the server unless a firewall rule allows their IP through the firewall. To enable external connectivity to your database, ...
You can create a query layer on the New Query Layer dialog box by connecting to a relational database and defining an SQL query to be run against its tables and columns. The results of the query are added to the map as a query layer.
many years, SQL has been widely used as the language for database queries. Based on relational algebra, SQL provides an internally consistent mathematical language that makes it easier to improve the performance of all database queries. In comparison, other approaches must define individual queries....