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SQL JOINS

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If you are familiar with SQL, you might have written queries to fetch data using a single table. But SQL joins are used to fetch data from two or more tables. This can be considered as one of the most benefited features enable in SQL. Lets see how we can use SQL joins to fetch data . Rather than storing the same data in multiple tables,by using this method one table will keep a reference to a ID of the other table. This approach is more efficient  and lets see we can do this using SQL joins. Types of Joins In MySql we can see there are mainly three joins , INNER JOIN LEFT JOIN RIGHT JOIN 01. INNER JOINS In INNER JOIN,  the query selects all the rows from both tables where there is a match between the columns in both tables. SQL Query SELECT column_name(s) FROM table1 INNER JOIN table2 ON table1.column_name=table2.column_name; Here the INNER JOIN is Specified by the ON keyword which is in the syntax. Example : Lets see How t...
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Creating a Server in Node.js

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From the previous article we got to know how to read and write files in Node.js. This article will help you to get to know about Clients and servers in Node.js First lets look at  what client and server really means. When we browsing internet by using chrome or any other browser we request for some data. This is where the client send its request to get a response particular to the clients request. Then the server acts on the request of the client and send a response which we finally see as our search results. Basically considering the client ad server each computer can be uniquely identified by using their IP addresses.So when communicating they need to get connected through the IP addresses.So the information is shared using different protocols like http. This transferring data is called TCP where the data is transmitted through data packets from server to client.  Using Node.js, we can use the same functionality to communicate with computers. Creating a Basic S...
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Java Part 2 :How to Install Java

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