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The correct term is "What are data structures in database management systems?"
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What is data sub-language?
A data Sublanguage is a computer language used to define or manipulate the structure of a relational database management system(DBMS) e.g QBE, SQL.
What data structure and logarithm?
data structure is a way of storing data in a computer so that it can be used efficientlyan algorithm is a sequence of instructions, often used for calculation and data processing.Often a carefully chosen data structure will allow the most efficient algorithm to be used.
What the data structure is used behind FACEBOOK?
The GRAPH data structure used behind Facebook.for more detail see
Which type of data is used to explain a relationship?
A foreign key constraint is used to represent a relationship in a RDBMS (relational database management system).
What data structure is used to store homogeneous data item?
array
Describe three commonly used data models?
Enterprise data model, Relational model and ????
What is a record-based data model?
-> A record based data model is used to specify the overall logical structure of the database.-> In this model the database consists of a no. of fixed formats of different types.-> Each record type defines a fixed no. of fields having a fixed length.-> There are 3 principle types of record based data model. They are :1. Hierarchical data model.2. Network data model.3. Relational data model.
Advantages and disadvantages of relational data model?
Advantages of relational data model include data integrity through normalization, flexibility to query data using SQL, and ease of understanding relationships between entities. Disadvantages can include performance issues with complex queries, potential for data duplication across tables, and difficulty in scaling for very large datasets.
What do you understand by a Database-Model?
A database model is a theory or specification describing how a database is structured and used. Several such models have been suggested. Common models include: * Hierarchical model * Network model * Relational model * Entity-relationship * Object-relational model * Object model A data model is not just a way of structuring data: it also defines a set of operations that can be performed on the data. The relational model, for example, defines operations such as select, project, and join. Although these operations may not be explicit in a particular query language, they provide the foundation on which a query language is built.
What is data sub language?
A data Sublanguage is a computer language used to define or manipulate the structure of a relational database management system(DBMS) e.g QBE, SQL.
What is data sub-language?
A data Sublanguage is a computer language used to define or manipulate the structure of a relational database management system(DBMS) e.g QBE, SQL.
What is a good way to represent a database?
Relational model of database is a good way to represent the database. Also network data model and hierarchical model can be used depending on the requirements.
What is post relational data model?
A number of extensions to the relational data model have been proposed in the three decades or so since its invention. Many of these extensions have been implemented in commercial DBMS. What is termed the post-relational data model here is not strictly a data model in that no coherent theory has been developed. Nevertheless it is useful to discuss it here in terms of a set of mech- anisms found in many contemporary DBMS. Such a data model is also referred to by the terms extended-relational and object-relational data model. In Chapter 18 we discuss how the proposed SQL3 standard addresses many of these features. In Chapter 34 we also consider how the ORACLE DBMS supports some of these features. In the first half of the chapter we consider two extensions to the data defin- ition part of the relational data model: abstract data types and nested relations. In the second half of the chapter we consider two constructs - triggers and stored procedures - that have been used both for data manipulation and data integrity purposes. The incorporation of these features into a relational DBMS provides it with the ability to handle complex objects and behaviour. Hence many of the DBMS with these features have termed themselves object-rela- tional systems.
What is the advantage of relational database model?
The advantages are as follows: The relational database model is by far the most widely used. It is easier to control, more flexible, and more intuitive than other approaches because it organizes data in tables. The relational model can also be used with personal computers and mainframe systems. It allows tables to be linked. This linkage is especially useful when information is needed from multiple tables.
Advantages and disadvantages of relational database?
Advantages: Data integrity: Ensures consistency and accuracy of data. Scalability: Able to handle large amounts of data and users. Flexibility: Supports complex queries and relational structures. Disadvantages: Performance: Slower compared to NoSQL databases for some use cases. Cost: Can be expensive to set up and maintain. Schema rigidity: Requires predefined schema, making it less suitable for unstructured data.
Are there any major similiarities between object oriented databases and relational databases?
In a Object Oriented Database, information is given in the form of objects as used in programming languages. "When database capabilities are combined with object programming language capabilities, the result is an object database management system (ODBMS). An ODBMS makes database objects appear as programming language objects in one or more object programming languages." (http://en.wikipedia.org/wiki/Object_database)"A relational database is a database that conforms to the relational model, and refers to a database's data and schema (the database's structure of how those data are arranged). Common usage of the term "Relational database management system" technically refers to the software used to create a relational database, but sometimes mistakenly refers to a relational database." (http://en.wikipedia.org/wiki/Relational_database)
What is structural database design?
The logic structure is independent of any kind of data model,in the practical application, the general database used by theenvironment has given (such as SQL Server or Oracel or MySQL. Due to the current use of the database basically is relational database, so the first thing to the E-R diagram into relation model, and then according to the characteristics andlimitations of specific DBMS conversion for the specificsupport of DBMS data model, the final optimization
