Traditional relational database refers to a database that uses a relational model to organize data. It stores data in the form of rows and columns. Common ones include Oracle, DB2, PostgreSQL, Microsoft SQL Server, Microsoft Access, MySQL, and Inspur. K-DB and other databases.
#What are the common relational databases and non-relational databases?
Relational database:
The relational model refers to the two-dimensional table model, so a relational database is a data organization composed of two-dimensional tables and the relationships between them.
Common ones include: Oracle, DB2, PostgreSQL, Microsoft SQL Server, Microsoft Access, MySQL, Inspur K-DB, etc.
Non-relational databases:
Common ones include : NoSql, Cloudant, MongoDB, redis, HBase
NoSQL (Not only SQL), generally refers to non-relational databases. With the rise of Internet web2.0 websites, traditional relational databases have become unable to cope with web2.0 websites, especially ultra-large-scale and high-concurrency SNS type web2.0 pure dynamic websites, exposing many insurmountable problems. Non-relational databases have developed very rapidly due to their own characteristics. NoSQL databases were created to solve the challenges brought by large-scale data collections and multiple data types, especially big data application problems. Philippine relational databases can create fast, scalable repositories for big data.
The difference between the two databases:
For relational database
Characteristics of relational database
1. Relational database, It refers to a database that uses a relational model to organize data;
2. The biggest feature of a relational database is the consistency of transactions;
3. Simply put, the relational model refers to two Dimensional table model, and a relational database is a data organization composed of two-dimensional tables and the relationships between them.
Advantages of relational database
1. Easy to understand: the two-dimensional table structure is a concept very close to the logical world, and the relational model is easier to understand than other models such as mesh and hierarchy;
2. Easy to use: the common SQL language makes it very convenient to operate relational databases;
3. Easy to maintain: rich integrity (entity integrity, referential integrity and user-defined Integrity) greatly reduces the probability of data redundancy and data inconsistency;
4. Supports SQL and can be used for complex queries.
Disadvantages of relational database
1. The huge price paid to maintain consistency is its poor read and write performance;
2.Fixed table structure;
3. High concurrent reading and writing requirements;
4. Highly efficient reading and writing of massive data;
For non-relational databases
Non-relational databases Features
1. Use key-value pairs to store data;
2.Distributed;
3. Generally does not support ACID features;
4. Non-relational database is not strictly a database, but a collection of structured data storage methods.
Advantages of non-relational database
1. No need to parse through the sql layer, high read and write performance;
2. Based on key-value pairs, the data has no coupling , easy to expand;
3. The format of storing data: the storage format of nosql is key, value form, document form, picture form, etc., document form, picture form, etc., while relational database only supports Base type.
Disadvantages of non-relational database
1. No SQL support is provided, and the cost of learning and use is high;
2. No transaction processing, additional functions bi and reports, etc. Support is not good either
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