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The following are the differences between JavaScript and C++.JavaScript is a lightweight, interpreted programming language. It is designed for creating network-centric applications. It is complementary to and integrated with Java. JavaScript is very easy to implement because it is integrated with HTML. It is open and cross-platform.C++ is a middle-level programming language developed by Bjarne Stroustrup starting in 1979 at Bell Labs. It runs on a variety of platforms, such as Windows, Mac OS, and the various versions of UNIX.JavaScript is a scripting whereas C++ is a programming language.C++ program is to be compiled and executed, whereas a script in ... Read More
You can use an aggregate function SUM() along with IF(). Let us first create a table −mysql> create table DemoTable ( FirstName varchar(100), LastName varchar(100) ); Query OK, 0 rows affected (2.80 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('Adam', 'Smith'); Query OK, 1 row affected (0.25 sec) mysql> insert into DemoTable values('John', 'Smith'); Query OK, 1 row affected (0.36 sec) mysql> insert into DemoTable values('John', 'Doe'); Query OK, 1 row affected (1.38 sec) mysql> insert into DemoTable values('Bob', 'Doe'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable values('Sam', ... Read More
To fetch multiple values wit LIKE, use the LIKE operator along with OR operator. Let us first create a table −mysql> create table DemoTable1027 ( Id int, Name varchar(100) ); Query OK, 0 rows affected (1.64 sec)Insert some records in the table using insert command −mysql> insert into DemoTable1027 values(100, 'John'); Query OK, 1 row affected (0.72 sec) mysql> insert into DemoTable1027 values(20, 'Chris'); Query OK, 1 row affected (0.56 sec) mysql> insert into DemoTable1027 values(200, 'Robert'); Query OK, 1 row affected (0.84 sec) mysql> insert into DemoTable1027 values(400, 'Mike'); Query OK, 1 row affected (0.47 sec)Display all ... Read More
A function in JavaScript looks like the following:(function(){...})()A library in JavaScript shows a function, which begins with a semicolon, for example:;(function ) { }The semicolon allows to safely concatenate several JS files into one. This is to serve it faster as one HTTP request.A leading semicolon can also be to protect from preceding code, which may have been improperly closed. A semicolon will definitely prevent this from happening.
Method and a function are the same, with different terms. A method is a procedure or function in object-oriented programming.A function is a group of reusable code which can be called anywhere in your program. This eliminates the need for writing the same code again and again. It helps programmers in writing modular codes.The following is the syntax of a JavaScript function: Here’s an example:
Let us first create a table −mysql> create table DemoTable ( CustomerName varchar(100), CustomerCountryName varchar(100) ); Query OK, 0 rows affected (0.95 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('Chris', 'US'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values('Bob', 'UK'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values('Carol', NULL); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values('David', 'AUS'); Query OK, 1 row affected (0.32 sec) mysql> insert into DemoTable values('Mike', NULL); Query OK, 1 row affected (0.18 sec)Display all records ... Read More
You can use concat(). Let us first create a table −mysql> create table DemoTable ( Value int ); Query OK, 0 rows affected (0.73 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(100); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values(200); Query OK, 1 row affected (0.08 sec) mysql> insert into DemoTable values(100); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable values(200); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values(200); Query OK, 1 row affected (0.11 sec) mysql> insert into DemoTable values(100); Query ... Read More
For this, you can use LENGTH() along with REPLACE(). Let us first create a table −mysql> create table DemoTable ( Value int ); Query OK, 0 rows affected (1.22 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(10002000); Query OK, 1 row affected (0.09 sec) mysql> insert into DemoTable values(00000); Query OK, 1 row affected (0.17 sec) mysql> insert into DemoTable values(400560); Query OK, 1 row affected (0.19 sec)Display all records from the table using select statement −mysql> select *from DemoTable;This will produce the following output −+----------+ | Value | +----------+ | 10002000 ... Read More
To parse a string to int, you can use the following:try: print int('112') except ValueError: print 'Cannot parse'This will give you the output:112To parse a string to float, you can use the following:try: print float('112.15') except ValueError: print 'Cannot parse'This will give you the output:112.15
For this, you can use IFNULL(). Let us first create a table −mysql> create table DemoTable ( FirstName varchar(100), LastName varchar(100) ); Query OK, 0 rows affected (0.62 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('John', 'Doe'); Query OK, 1 row affected (0.29 sec) mysql> insert into DemoTable values(NULL, 'Taylor'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values('David', NULL); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values(NULL, 'Miller'); Query OK, 1 row affected (0.12 sec)Display all records from the table using select statement −mysql> ... Read More