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What is Index?
An index is a physical structure having pointers to the data. Indices are created in an existing table to locate rows more quickly and efficiently. It is possible to create an index on one or more columns of a table, and each index is given a name. The users cannot see the indexes; they are just used to speed up queries. Effective indexes are one of the best ways to improve performance in a database application. A table scan occurs when there is no index available to help a query. In a table scan SQL Server examines every row in the table to satisfy the query results. Table scans are sometimes unavoidable, but on large tables, scans have a terrific impact on performance.
What is an index? An index is a structure that helps to place desired records of a relation quickly, without probing all records.
What is the difference among a database schema and a database state? The collection of information stored in database at particular moment in time is known as database state a
The physical location of a record is determined by which mathematical formula that transforms a file key into a record location? The physical location of a record is determined
Accessing information about permissions to all users- Object level permissions: With the use of data dictionary you can see the permissions to user. Let us get the table name fro
A field-groups statement or an insert statement reverses storage space and transfers values. False.
I need ERP system We are selling automotive spare parts on the internet and we require ERP software, which would sync with our e-shop. Our e-shop doesn't use any e-commerce plat
What is Relational Algebra? Relational algebra is a Procedural query Language?
Hi is anyone well versed in accounting information systems available now to help me work through an important assignment due tomorrow at noon?
What is a Database? To know what database is, we have to start from data, which is the basic building block of any DBMS. Data: Facts, figures, statistics etc. having no pa
What is Collation Collation is a kind of sort order. There are majorly 3 types of sort orders, namely: i.) Dictionary case insensitive ii.)Dictionary - case sensitive
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