Article Categories
- All Categories
-
Data Structure
-
Networking
-
RDBMS
-
Operating System
-
Java
-
MS Excel
-
iOS
-
HTML
-
CSS
-
Android
-
Python
-
C Programming
-
C++
-
C#
-
MongoDB
-
MySQL
-
Javascript
-
PHP
Articles by Kumar Varma
88 articles
How to use autocomplete attribute in HTML?
HTML autocomplete attribute is used with form element to set the autocomplete attribute on or off. If the autocomplete attribute value is set to on, browser will automatically recommend values based on what users entered earlier in the field. If the value is set to off, browser will not recommend earlier filled values in that field. In this article, we are having two input fields, our task is to demonstrate how to use autocomplete attribute in HTML. Different Ways to Use autocomplete Attribute Here is a list of different ways in which we can use autocomplete attribute in our ...
Read MoreQuery MySQL with unicode char code?
Let us first create a table −mysql> create table DemoTable -> ( -> Value int -> ); Query OK, 0 rows affected (0.57 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(0x41); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values(0x30); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values(0x61); Query OK, 1 row affected (0.27 sec)Display all records from the table using select statement −mysql> select *from DemoTable;OutputThis will produce the following output −+-------+ | Value | +-------+ | 65 | | ...
Read MoreHow to get total occurrences of a value within its own MySQL query?
For this, you can use subquery. Let us first create a table −mysql> create table DemoTable -> ( -> Value int -> ); Query OK, 0 rows affected (0.61 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values(20); Query OK, 1 row affected (0.23 sec) mysql> insert into DemoTable values(30); Query OK, 1 row affected (0.36 sec) mysql> insert into DemoTable values(20); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable values(40); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values(30); Query OK, ...
Read MoreHow to remove all instances of a specific character from a column in MySQL?
Let us first create a table −mysql> create table DemoTable -> ( -> FirstName varchar(100) -> ); Query OK, 0 rows affected (0.41 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('Adam^^^'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values('^^^^^^^^Carol'); Query OK, 1 row affected (0.18 sec) mysql> insert into DemoTable values('Robert^^^^^^'); Query OK, 1 row affected (0.14 sec)Display all records from the table using select statement −mysql> select *from DemoTable;OutputThis will produce the following output −+---------------+ | FirstName | +---------------+ | Adam^^^ ...
Read MoreSelect all rows except from today in MySQL?
Let us first create a table −mysql> create table DemoTable -> ( -> Name varchar(100), -> DueDate datetime -> ); Query OK, 0 rows affected (0.54 sec)Insert some records in the table using insert command. Let’s say the current date is “2019-07-03” −mysql> insert into DemoTable values('Chris', '2019-06-24'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable values('Chris', '2018-01-01'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable values('Robert', '2019-07-03'); Query OK, 1 row affected (0.21 sec) mysql> insert into DemoTable values('Carol', '2019-08-03'); Query OK, 1 row affected (0.22 ...
Read MoreCan I get the count of repeated values in a column with MySQL?
Yes, you can use ORDER BY DESC with GROUP BY. Let us first create a table −mysql> create table DemoTable -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> PostMessage varchar(100) -> ); Query OK, 0 rows affected (0.69 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(PostMessage) values('Hi'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable(PostMessage) values('Hello'); Query OK, 1 row affected (0.16 sec) mysql> insert into DemoTable(PostMessage) values('Hi'); Query OK, 1 row affected (0.12 sec) mysql> insert into DemoTable(PostMessage) values('Awesome'); Query OK, ...
Read MoreHow to use if clause in MySQL to display Students result as Pass or Fail in a new column?
Let us first create a table −mysql> create table DemoTable -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> Name varchar(100), -> Subject varchar(100), -> Score int -> ); Query OK, 0 rows affected (0.94 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(Name, Subject, Score) values('Chris', 'MySQL', 80); Query OK, 1 row affected (0.32 sec) mysql> insert into DemoTable(Name, Subject, Score) values('Robert', 'MongoDB', 45); Query OK, 1 row affected (0.62 sec) mysql> insert into DemoTable(Name, Subject, Score) values('Adam', 'Java', 78); Query OK, 1 row affected ...
Read MoreSelect the topmost record from a table ordered by desc on the basis of ID?
For this, use ORDER BY DESC with LIMIT 1. Let us first create table −mysql> create table DemoTable -> ( -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> UserName varchar(100), -> UserMessage text -> ); Query OK, 0 rows affected (1.17 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(UserName, UserMessage) values('Adam', 'Hi'); Query OK, 1 row affected (0.92 sec) mysql> insert into DemoTable(UserName, UserMessage) values('Chris', 'Awesome'); Query OK, 1 row affected (0.52 sec) mysql> insert into DemoTable(UserName, UserMessage) values('Robert', 'Nice'); Query OK, 1 row affected (0.65 sec) ...
Read MoreCan we compare numbers in a MySQL varchar field?
Yes, we can do this by first using CAST(). Let us first create a table −mysql> create table DemoTable -> ( -> StudentId int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> StudentScore varchar(100) -> ); Query OK, 0 rows affected (0.66 sec)Insert some records in the table using insert command −mysql> insert into DemoTable(StudentScore) values('90'); Query OK, 1 row affected (0.21 sec) mysql> insert into DemoTable(StudentScore) values('100'); Query OK, 1 row affected (0.13 sec) mysql> insert into DemoTable(StudentScore) values('56'); Query OK, 1 row affected (0.10 sec) mysql> insert into DemoTable(StudentScore) values('98'); Query OK, 1 ...
Read MoreMySQL query to remove a value with only numbers in a column
For this, you can use REGEXP. Let us first create a table −mysql> create table DemoTable -> ( -> ClientCode varchar(100) -> ); Query OK, 0 rows affected (0.56 sec)Insert some records in the table using insert command −mysql> insert into DemoTable values('Chris902'); Query OK, 1 row affected (0.21 sec) mysql> insert into DemoTable values('Robert_'); Query OK, 1 row affected (0.14 sec) mysql> insert into DemoTable values('903'); Query OK, 1 row affected (0.15 sec) mysql> insert into DemoTable values('123_David'); Query OK, 1 row affected (0.21 sec)Display all records from the table using select statement ...
Read More