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Showing posts from October, 2018

MYSQL,RDBMS

things which make thing easy Ex. creating table in mysql CREATE TABLE student( student_id INT, name VARCHAR(20) NOT NULL, subject VARCHAR(20) /////DEFAULT 'undefined'///UNIQUE/////AUTO INCREMENT, PRIMARY KEY(student_id)///important to mention ); /////inserting data///// SELECT * from student; INSERT INTO student VALUES(1,'rahul','math'); INSERT INTO student VALUES(2,'aaditya','English'); INSERT INTO student VALUES(3,NULL,'biology');//error --->name should not be null INSERT INTO student(student_id,name) VALUES(4,'rajesh');--->for specific use '*' this symbol is used to select all the data from database Ex. select * from student; for specific use  Ex. select major, name from student order by name/////name desc;////asc (ascending) not equal---->     '< >' Projection is unary operator it is used to list it returns arguments which are specific to it • It yields a v...

Things you should know about Android Development

Android Development - android SDK - language: Java, Kotlin - url: developer.android.com - SDK   - software development kit   - features     - collection of header files or namespaces or packages: packages     - collection of libraries     - toolchain       - compiler or interpreter: javac, dx       - assembler : -       - disassembler : java -p       - linker : -       - debugger : jdb       - extra tools : adb, monkeyrunner, gradle     - documentation : developer.android.com     -----------------------------------------------------------------------------     - Integrate Development Environment: Android Studio     - Emulator or Simulator or VM   : emulator       - qemu: quick emulator       - Genny motion: commercial       - BlueSt...