In today's time, due to increasing pollution and water-borne diseases, it has become necessary to have a Water Purifier in every house. A water purifier provides us clean and pure water for drinking. In today's modern era, there are many options to purify water. One of these options is RO Water Purifier which is a more advance and most commonly used technology. The full form of RO is Reverse Osmosis. In today's article, I will tell you what is RO (What is RO in Hindi) and how it works, and all other important information related to it, after reading you will get answers to all questions related to RO in one place. So let's start without any further delay. What is RO? The full form of RO is Reverse Osmosis and it is a water purification process. In this technology, RO membranes are used to purify water. RO membrane is a very thin membrane like a cloth in which there are very fine holes. Through this, viruses, bacteria, and germs of very small size present inside the wat
In the computer world, people rely on programming languages to send instructions to their machines. Programming languages are essential for controlling the behavior of computers, and for being precise in executing step-by-step procedures for their function. One of the more widely used programming languages is SQL.
Background
Computer scientists Donald D. Chamberlin and Raymond F. Boyce developed SQL in the early to mid-1970s while working on database projects for IBM in New York. Originally called SEQUEL for “Structured English Query Language,” the acronym was later whittled down to three letters because the initial version was already a registered trademark of a British aircraft company. A third IBM computer scientist, Edgar F. Codd, included SQL in his paper entitled “A Relational Model of Data for Large Shared Data Banks.” Published in June of 1970 in the Associate of Computer Machinery (ACM) journal — Communications of the ACM — Codd’s paper formed the basis of the relational database management system (RDBMS), which is now one of the major methods of storing information in the computer world.
Description
SQL is classified as a special-purpose programming language, also known as a domain-specific language. This means that it has a well-defined collection of elements designed for use within a specific sphere of computing. In the case of SQL, it is used for gaining access to and modifying information in a database, specifically, an RDBMS. This system is named after its ability to store data in the form of related tables, each of which consists of rows and columns. The rows classify the type of data in the table, while the columns contain the data itself.
Function
The common use of SQL is as a query language. With queries, the syntax is structured like a command. This allows the database administrator, or DBA, to specify the type or amount of data he or she wishes to extract, while the DBMS receives the query and acts upon it. For instance, a query like SELECT SAL FROM EMP would pull up all the salaries of the employees (columns), which are under the SAL row in the table named “EMP” for “employees.”
Queries must contain clauses for successful execution. For example, the aforementioned FROM clause indicates the table from which the DBA wants to retrieve data. Another popular clause used by SQL is WHERE; this one restricts the amount of data that the query sends to the DBA. For instance, a query like SELECT SAL FROM EMP WHERE SAL >3000 would pull up all the salaries that are greater than $3,000. Operators like the aforementioned “greater than” symbol also help in restricting data. Others symbols include = (equal to), < (less than), and >= (greater than or equal to).
Ultimately, SQL is one of the most common and accessible computer languages in the world. SQL is often the language of choice for businesses and institutions that need to manage or maintain vast databases, as its search functions allow for the easy retrieval of complex information.
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