Found 1948 Articles for Differences

Data Lake and Data Warehouse both are used for storing big data. A Data Lake is a very big storage repository which is used to store raw unstructured data, machine to machine, logs flowing through in real-time. The purpose of the stored data is not defined in a data lake. They are stored for future analysis of the data. A data warehouse is a repository for structured, filtered data that has already been processed for a specific purpose. A Data warehouse collects the data from multiple sources and transforms the data using ETL process, then loads it to the Data ... Read More

In a relational database, keys are the most important elements to maintain the relationship between two tables or to uniquely identify the data from a table. Primary key is used to identify data uniquely therefore two rows can't have the same primary key. It can't be null. On the other hand, foreign key is used to maintain relationship between two tables. The primary key of a table acts as the foreign key in another table. The Foreign key in a table helps enforce Referential Integrity constraint. Read this tutorial to find out more about Primary and Foreign keys and how ... Read More

Data canters consist of a large number of enterprise servers. Not all servers are active at the same time. In case traffic is directed mostly to a particular set of servers more, those servers get busy. The other servers are less loaded, or they even turn totally inactive, thereby wasting power, maintenance costs, and other allied resources.With the changing times, businesses started looking for solutions to reduce overhead costs, enhance scalability, and standardize application deployment process. They started considering the following two approaches to reduce costs −Virtualization − Virtualization is the technology that can simulate your physical hardware (such as ... Read More

Both the TRUNCATE statement and the DELETE statement are included in the category of SQL queries for deleting the data stored in a table. They carry out deletion operations on records or rows of a table that are no longer needed. A condition is applied before each entry in the table that is being deleted when using the DELETE command. To put it another way, it is possible to delete one or more rows all at once. However, with the TRUNCATE command, each row is removed from the table simultaneously. When we delete something using the DELETE query, a log ... Read More

An Index is a lookup table associated with an actual table or View that is used by the database to improve the data retrieval performance timing. In an index,  keys are stored in a structure (B-tree) that enables SQL Server to find the rows associated with the key values quickly and efficiently. Index gets created automatically if the primary key and unique key constraints are defined on the table. There are two types of index namely, Clustered Index and Non-Clustered Index. Read this article to learn more about clustered index and non-clustered index and how they are different from each ... Read More

Both Composition and Aggregation are types of association which are used to represent the relationship between two classes. But they are absolutely different from each other. The basic difference between the two is that composition is a strong association, while aggregation is a weak association. Read this article to learn more about composition and aggregation and how they are different from each other. What is Composition? Composition is a method of wrapping the simple objects or data types into a single unit. It is a type of association used to represent the relationship between two classes. Composition is considered as ... Read More

There are two ways of organizing data in a DBMS − one is row-oriented database and another is column-oriented database. The basic difference between the two is that a row-oriented database stores the data tables by rows, whereas a column-oriented database stores the data tables by columns. Read this article to learn more about row-oriented database and column-oriented database and how they are different from each other. What is Row-Oriented Database? A Roworiented database is a traditional database like Oracle, MySQL, etc. It stores data tables by rows and the common method of storing a table is to serialize each ... Read More

Unit testing and system testing are two different types of software testing techniques. The focus of unit testing is to ensure that each unit of a software product works as intended. System testing, on the other hand, tests the entire software product as a whole. Read this article to learn more about unit testing and system testing and how these two testing techniques are different from each other. What is Unit Testing? Unit testing is a type of testing in which a single module is tested at a time. Unit testing checks if the individual units of an application function ... Read More

Unit testing and sandwich testing are two different types of software testing techniques. In Unit testing, the individual units of a software product are tested in isolation from the rest of the application. Sandwich testing, on the other hand, focuses on testing the interactions between multiple units of a software product. Read this article to learn more about unit testing and sandwich testing and how these two testing techniques are different from each other. What is Unit Testing? Unit testing is a type of testing in which a single module is tested at a time. Unit testing checks if the ... Read More

FTP is an Internet protocol for transmitting or transferring data from one computer to another via TCP or IP networks. TELNET, on the other hand, is a connection protocol that allows a user to connect to a remote server waiting for commands. The user can then give commands to the server and inspect the returned responses, once the connection has been established.Read through this article to find out more about Telnet and FTP and how they are different from each other.What is Telnet?Telnet is a network protocol that allows you to remotely connect to a computer and establish a two-way, ... Read More