Hypertechblog

An error occurred while installing rmagick (2.16.0), and Bundler cannot continue You have to install library of rmagick in your system. sudo apt-get install imagemagick libmagickcore-dev libmagickwand-dev

Features of Sql * Plus At a time only one query is allowed to execute Sql queries are not case sensitive Each query is terminated with ; ( semi colon ) SQL commands are ANSI standard ( American National standard institute )

What is sql in Deep(Structured query language) Oracle was the first company to release a product that used the English-based Structured Query Language, or SQL. This language allows end users to extract information themselves, without using a systems group for every little report. Oracle’s query language has structure, just as English or any other language has structure. It has rules of grammar and syntax, but they are basically the normal rules of careful English speech and can be readily understood. What is SQL QUERIES It is known as data base language. It is used to communicate with any database. We can use this language constructs to write SQL QUERIES. What is SQL* PLUS SQL * PLUS is a default client tool and acts as an interface between client and database. What is SQL It is a collection of pre defined commands and constructs with syntactical rules

public static void main( String []args ). This string args is used to taking input from console,when we access the file and give some input value. suppose our filename is ABC.java And the className, which has Main method is ABC. To compile this we Run command- javac ABC.java After the compilation this will generate class code that is- ABC.class When we run this using- java ABC “ if here we pass some value this value will go to the args ”. so thats why we use it.

Error 404 is generate when, Database connection is failed. Incorrect query parameters. Incorrect dB name. Mismatch swapping between webpages.