Technology Security Analyst
SQL is a Structured Query Language, which is a computer language for storing, manipulating and retrieving data stored in a relational database.
SQL is the standard language for Relational Database systems. All the Relational Database Management Systems (RDMS) like MySQL, MS Access, Oracle,
The three main reasons to study SQL are:
The applications of SQL are:
The database administrators and developers make use of SQL to write data integration scripts.
The setting up and running of analytical queries can be done using structured query language by data analysts.
The subsets of information from a database for analytical applications and transaction processing can be retrieved using a structured query language. Select, update, create, insert, alter, delete, add, etc. are the most commonly used structured query language elements.
The index structures and database tables can be modified using a structured query language. By using this language, addition, updating, modification of data in the database can be done by the users.
SQL is an efficient language for database communication. It has various advantages, some of them are listed below:
1. Simple and easy
One of the things that make SQL a popular choice is that it doesn't require any substantial knowledge about coding and writing programs. SQL has some basic keywords such as, SELECT, INSERT INTO, UPDATE, etc that can carry out tasks. Syntactical rules are also simple and easy to follow.
2. Faster Query Processing
SQL works with an efficient speed. Huge data can be processed in seconds! Querying, manipulating, and calculations on data with analytical queries in a relational database can be done in no time.
3. Standard Language
As already mentioned, SQL is a standardized structured query language approved by ISO and ANSI for relational databases. It's long, detailed and established documentation overs years also stands a strong plus point.
4. Portable
It is highly portable as used in PCs, servers, independent laptops having any operating system such as Windows, Linux, Mac etc. It can also be embedded with other applications.
5. Highly Interactive
As it has simple commands for all purposes, it becomes an interactive language for its users. It easy to understand and the commands are also understandable to the non-programmers.
Now let's talk about of the disadvantages of SQL.
1. Poor Interface
SQL has a poor interface as it makes look everything very complex even when it's not! Due to its difficult interfacing, users find it difficult to deal with the databases.
2. Cost Inefficient
SQL Server Standard costs around $1,418/year. The high cost makes it difficult for some programmers to use it.
3. Partial Control
SQL doesn't grant the complete control over databases to its users. This is due to some hidden business rules.
4. Security
Regardless of the SQL version, databases in SQL is constantly under threat as it holds huge amounts of sensitive data.
The broadness and extent of the SQL orders give the ability to make and control a wide assortment of information base items utilizing the different CREATE, ALTER, and DROP orders. Those information base items then, at that point, can be stacked with information utilizing orders like INSERT. The information can be controlled utilizing a wide assortment of orders, like SELECT, DELETE, and TRUNCATE, just as the cursor orders, DECLARE, OPEN, FETCH, and CLOSE. Exchanges to control the information are controlled through the SET order, in addition to the COMMIT and ROLLBACK orders. Lastly, different orders canvassed in this section incorporate those that control a client's admittance to data set assets through orders like GRANT and REVOKE.