To count the unique values on a column, you need to use keyword DISTINCT. To understand how it is done, let us create a table. The query to create a table is as follows −mysql> create table UniqueCountByIPAddress    -> (    -> Id int NOT NULL AUTO_INCREMENT,    -> ... Read More

To get background location in swift we need to go through a few stepsGet the permissions from the user, in your info.plist file add Privacy- Location always andwhen in usage Description, Privacy – When in usage description and add their respective description.After that, you need to import the CoreLocation framework ... Read More

You will get an error whenever you return multiple rows in the benchmark. Return a scalar value or single row instead of multiple rows. The syntax is as follows −SELECT yourColumnName FROM yourTableName WHERE yourCondition.To understand the above syntax, let us create a table. The query to create a table ... Read More

SimPy (rhymes with “Blimpie”) is a python package for process-oriented discrete-event simulation.InstallationThe easiest way to install SimPy is via pip:pip install simpyAnd the output you may get will be something like, At the time of writing, simpy-3.0.11 is the most recent version of SimPy, and we will use it for ... Read More

The “H” format in Java Date is like 0, 1, 2, 3, … 23 hour. Use SimpleDateFormat("H") to get the same format.// displaying hour in H format SimpleDateFormat simpleformat = new SimpleDateFormat("H"); String strHour = simpleformat.format(new Date()); System.out.println("Hour in H format = "+strHour);Above, we have used the SimpleDateFormat class, therefore ... Read More

Tkinter is a python library for developing GUI (Graphical User Interfaces). We use the tkinter library for creating an application of UI (User Interface), to create windows and all other graphical user interfaces.If you’re using python 3.x(which is recommended), Tkinter will come with Python as a standard package, so we ... Read More

To declare a datetime variable, you need to use a user-defined variable using the SET command. The syntax is as follows −SET @anyVariableName=’yourdatetimeValue’;To understand the above syntax, let us create a table. The query to create a table is as follows −mysql> create table datetimeVariables -> ( ... Read More

The “k” format in Java Date is used to format hour in 1-24 format. Use SimpleDateFormat("k") to get the same format.// displaying hour in k format simpleformat = new SimpleDateFormat("k"); String strHour = simpleformat.format(new Date()); System.out.println("Hour in k format = "+strHour);Above, we have used the SimpleDateFormat class, therefore the following ... Read More

In MySQL, you can use two different types of quotation marks which is backtick and another is single quotes or double quotes. In this case, maybe you are using single quotes to the column name that’s why you are getting error. You need to use the backtick symbol (` `) ... Read More

The “K” format in Java Date is used to display hour in 0-11 in AM/PM format. Use SimpleDateFormat("K") to get the same format.// displaying hour in K format SimpleDateFormat simpleformat = new SimpleDateFormat("K"); String strHour = simpleformat.format(new Date()); System.out.println("Hour in K format = "+strHour);Above, we have used the SimpleDateFormat class, ... Read More