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Kotlin 2022-03-27 07:40:17
var and val in kotlin
val and var both are used to declare a variable. var is like general variable and it's known as a mutable variable in kotlin and can be assigned multiple times. val is like Final variable and it's known as immutable in kotlin and can be initialized only s... Add solution -
C++ 2022-03-14 07:05:04
constant variables in c++
// various versions of const are explained below #include <iostream> class Entity { private: int m_X, m_Y; mutable int var; // can be modified inside const menthods int* m_x, *m_y;// * use to create pointer in one line public: int GetX() const /... Add solution -
Python 2022-03-12 22:30:36
how to read mysql table in python
import pandas as pd import sqlalchemy # make sure you have installed both mysql & pymysql # root:root is my username and password/default engine = sqlalchemy.create_engine("mysql+pymysql://root:root@localhost/database name", p... Add solution -
SQL 2022-03-08 19:05:13
mysql vs postgresql
/*Postgres is an object-relational database, while MySQL is a purely relational database. This means that Postgres includes features like table inheritance and function overloading, which can be important to certain applications. Postgres also adheres mo... Add solution -
PHP 2022-02-24 14:30:02
how to programmatically set a cron job in php
//The stackoverflow link with detailed explanation https://stackoverflow.com/questions/23544851/how-to-set-up-a-cron-job-programmatically // Create a cron job require_once 'xmlapi.php'; /* * Instanciate the class, setting up username/password/IP * @... Add solution -
PHP 2022-02-02 18:30:50
showing database table in php
$connection = mysql_connect('localhost', 'root', ''); //The Blank string is the password mysql_select_db('hrmwaitrose'); $query = "SELECT * FROM employee"; //You don't need a ; like you do in SQL $result = mysql_query($query); echo "<t... Add solution -
Python 2022-01-31 23:32:16
django bulk update
objs = [ Entry.objects.create(headline='Entry 1'), Entry.objects.create(headline='Entry 2'), ] objs[0].headline = 'This is entry 1' objs[1].headline = 'This is entry 2' Entry.objects.bulk_update(objs, ['headline']) # Caveats # # -You cannot updat... Add solution -
Other 2022-01-30 01:16:33
What is view in DBMS
Views : Views in SQL are kind of virtual tables. A view also has rows and columns as they are in a real table in the database. We can create a view by selecting fields from one or more tables, present in the database. A View can either have all the row... Add solution