NoSQL databases are classified by the data model. Some of the examples are listed below. MongoDB MongoDB is a NoSQL document database that is scalable and flexible but allows querying and indexing. MongoDB is f
Relational databases focus on relations between data. Hence, relations database need to store data in a highly structured way. This enables faster indexing and query response times and makes the data more secure and consistent. On the other hand,NoSQL databasesdon't need to rely on structure a...
An advantage of relational databases includes the ease of adding or modifying new tables and entities without needing to change the structure of the database already in place. Relational database have many features, including indexing, setting data type, and setting validation tests, all these help...
Subschema, that states the part of the database server “seen” by the application command programs which truly generate the preferred evidence from the data comprised inside the database. The DML (Data Manipulation Language) query language, which denotes the situation in which records can be org...
Indexing is an important feature of MySQL. It supports different types of indexes like primary key index, unique index, normal index and full-text index. Indexes help to speed up the retrieval of data from MySQL database server. When retrieving the data from a database table, MySQL first ch...
1. Themapscript splits large data inputs into smaller chunks and applies your rules to form pairs of key and value parameters. For example, our task is to investigate word frequencies in a text. Then, the key and value would be “word” and “count” respectively. If the mapper comes ...