SQL stands for (Structure Query Language) and is a programming language useful in managing relational databases. In other words, business programmers and developers use it to administer, update, maintain and manipulate the databases which help in better decision making. In addition, it is one of the most popular and important languages to work with data and many institutions provide SQL Online Training In India.
Commands Of SQL
- DDL (Data Definition Language)- This command is responsible for making changes to the structure of a table such as creating, deleting, altering. Etc. Above all, these commands are auto-committed and they save changes permanently. Create, Alter, Delete. etc are some of its commands.
- DML (Data Manipulation Language)- These commands help manipulate the data within a table. Moreover, they do not affect a table itself and are not permanent to the database. Insert, Update, Delete, Megre. Etc are some of its commands.
- TCL (Transaction Control Language)- TCL commands help in keeping a check on other commands and their response on a database. In addition, they are capable of declaring a command invalid and rolling back the data to its original state. Commit, Rollback and Savepoint are some of the examples of this command.
- DCL (Data Control Language)- Data Control Language commands are useful in granting authority or taking it back from a database user. Grant and Revoke are examples of this command.
- DQL (Data Query Language)- Data Query Language commands help fetch data from tables based on easily applicable conditions. The select command is used to retrieve data from one or more tables.
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Features Of SQL
Given below are some of the uses of SQL
- Transaction Control in Database- SQL helps maintain all the transactional functions in a database. In addition, it contains a set of rules to ensure consistency in a database. These rules are known as ACID properties and they stand for Atomicity, Consistency, Isolation, Durability.
- Reporting Purpose & Machine Learning- SQL queries play an important role in reporting every project. In addition, it lets a user write queries for standalone reports. Machine learning professionals need to work with large datasets to ensure that they build an accurate model.
- SQL on a website- This language plays an important role in the functioning of interactive websites. As these websites contain a lot of user and product information, it backend is supported by a database. SQL helps in retrieving and storing this data therefore many e-commercial websites and movie booking sites use it to perform daily functions.
- Compatibility & Flexibility- As this language is compatible with relational databases such as Oracle database, MYSQL, Microsoft SQL. Etc, it provides flexibility to manipulate tables in a database. In addition, it is capable of connecting client web app to the database due to its libraries such as SQLite.
- Integration With Other Language- SQL is capable of integrating with two popular integrating languages which are R and Python. Integration with these scripting languages ensures easy maintenance of the database. In addition, this integration has uses in those sectors that handle large amounts of statistical data at a time.
- For Data Science & Analysis- As this language can easily integrate with scripting languages, it has various uses in data science & analysis. In addition, data analysis requires working with huge sets of data in Relational Databases and SQL helps in managing them with simple queries.
SQL vs NoSQL
NoSQL stands for “Not Only SQL”. It is a non-tabular database and it stores data differently than relational databases. In Addition, it is a mechanism for retrieving and storing the data. The main difference between SQL and NoSQL are as follows.
- Structure- SQL provides table-based structures that are helpful in multi-row transactions. On the other hand, NoSQL databases can have graph-based, document-based, or wide column stores.
- Knowledge & Community- As SQL is a more common language and has been around for a long while, it has huge community support along with available information. While NoSQL does not have huge community support and information available, Therefore, it can be hard to find help when needed.
- Scalability- SQL databases ensure vertical scalability and NoSQL databases have horizontal scalability.
Conclusion
SQL helps in managing relational databases and ensures better decision-making. This language comes with a few command types that help in operating the databases. In conclusion, it has features such as integrating with other languages and providing transactional control in databases. Aspirants who wish to learn this language and make a career in it can look for SQL Training In Gurgaon. As SQL has worldwide uses, learning it can uplift your career and provide you with better career opportunities.
