Which data structure is used in MySQL?
MySQL uses both BTREE (B-Tree and B+Tree) and HASH indexes. MyISAM use only BTREE indexes while MEMORY/HEAP and NDB can use both HASH and BTREE. MEMORY/HEAP and NDB will use the HASH index structure by default.
How is a database implemented?
The implementation phase is where you install the DBMS on the required hardware, optimize the database to run best on that hardware and software platform, and create the database and load the data.
How does MySQL database work?
Like most database management systems out there, MySQL has a client-server architecture and can be used in a networked environment. The server program resides on the same physical or virtual system where the database files are stored, and it is responsible for all interactions with the databases.
How is a data structure different from a database?
The main difference between database and data structure is that database is a collection of data that is stored and managed in permanent memory while data structure is a way of storing and arranging data efficiently in temporary memory. We can process data to generate meaningful information.
What are the different query optimization techniques?
There are two methods of query optimization.
- Cost based Optimization (Physical) This is based on the cost of the query. The query can use different paths based on indexes, constraints, sorting methods etc.
- Heuristic Optimization (Logical) This method is also known as rule based optimization.
What is data implementation?
Definition: An implementation of a given data model is a physical realization on a real machine of the components of the abstract machine that together constitute that model.
What is MySQL and why is it used?
MySQL is a relational database management system based on SQL – Structured Query Language. The application is used for a wide range of purposes, including data warehousing, e-commerce, and logging applications. The most common use for mySQL however, is for the purpose of a web database.