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Articles by karthikeya Boyini
Page 138 of 143
How to integrate PayU Money in iOS using swift?
payU money is a payment gateway which is more popular in Indian online markets. To Integrate payU money we need to go through a few steps. Be careful with integrating payU and do not skip any of the steps of integration.Sign Up with payU money.Once you sign up, your key & salt, merchant ID will be generated which can be found in the dashboard after you login to your payU money account.After that in the terminal application, use the below code to clone payU money.Drag and drop the PlugNPlay folder to your project.$ git clone --recursive https://github.com/payu-intrepos/PayUMoney-IOS-SDK.gitNote − If you ...
Read MoreReturn order of MySQL SHOW COLUMNS?
To return order of MySQL SHOW COLUMNS, you need to use ORDER BY clause. The syntax is as follows −SELECT COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE table_name = ‘yourTableName’ AND column_name LIKE 'yourStartColumnName%' ORDER BY column_name DESC;Let us create a table in database TEST. The query to create a table is as follows −mysql> create table OrderByColumnName -> ( -> StudentId int, -> StudentFirstName varchar(10), -> StudentLastName varchar(10), -> StudentAddress varchar(20), -> StudentAge int, -> StudentMarks int ...
Read MoreShould I store a field PRICE as an int or as a float in the database?
You do not need to store a field PRICE as an int or as float in the database. For this, you can set the DECIMAL()..Most of the time integers can be used to represent the float point numbers and these integers are internally cast into DECIMAL() data type. Therefore, if you have field PRICE then always use DECIMAL() data type. The syntax is as follows −DECIMAL(M, D);Here, M represents the ‘TotalNumberOfDigit’ and D represents the ‘Number OfDigitAfterDecimalPoint’.To understand the above concept, let us create a table with field PRICE as DECIMAL data type. The query is as follows −mysql> create ...
Read MoreUsing LIKE for two where clauses in MySQL?
You don’t need to use two where clauses. Use two conditions using the LIKE operator and AND operator.To understand how to use LIKE for this, let us create a table. The query to create a table is as follows −mysql> create table WhereDemo -> ( -> Id int, -> Name varchar(20) -> ); Query OK, 0 rows affected (0.56 sec)Now you can insert some records in the table using insert command. The query is as follows −mysql> insert into WhereDemo values(101, 'Maxwell'); Query OK, 1 row affected (0.14 sec) mysql> insert into WhereDemo values(110, 'David'); Query ...
Read MoreCreate MySQL column with Key=MUL?
You need to use ADD KEY to make a column with Key=MUL. The syntax is as follows −ALTER TABLE yourTableName MODIFY COLUMN yourColumnName data type, ADD KEY(yourColumnName);To understand the above syntax, let us create a table. The query to create a table is as follows −mysql> create table Instructor -> ( -> Instructor_Id int, -> Instructor_Name varchar(30), -> Instructor_CourseName varchar(100) -> ); Query OK, 0 rows affected (0.63 sec)Now you can look the table description of the table, the column KEY does not have any MUL key. The query is as follows to check the ...
Read MoreGet the type of a variable in MySQL?
You cannot get the type of variable in MySQL. Cast the type of variable into another using CAST operator. The syntax is as follows −SET @yourVariableName:=’anyValue’Use the CAST operator to cast to another type. The syntax is as follows −SELECT CAST( @yourVariableName AS SIGNED);To understand the above syntax, let us cast to another type.Case 1: String to unsigned −mysql> set @StringToInt:='12345'; Query OK, 0 rows affected (0.00 sec)The query is as follows to another type −mysql> select CAST(@StringToInt as UNSIGNED);The following is the output −+--------------------------------+ | CAST(@StringToInt as UNSIGNED) | +--------------------------------+ | 12345 ...
Read MoreWhy is "LIMIT 0" even allowed in MySQL SELECT statements?
As you know if you use LIMIT 0 in MySQL SELECT statement, it returns an empty set.The LIMIT can be used when you want a specified number of rows from a result rather than the entire rows. If you use any MySQL API, then the job of LIMIT is to acquire the type of result columns.LIMIT 0 can be used to check the validity of a query. For more details use the following link −https://dev.mysql.com/doc/refman/8.0/en/limit-optimization.htmlHere is the demo of LIMIT 0. The query to create a table is as follows −mysql> create table Limit0Demo -> ( -> Id ...
Read MoreMySQL update query to remove spaces?
You can use TRIM() function to remove spaces. The syntax is as follows −UPDATE yourTableName SET yourColumnName=TRIM(yourColumnName);To understand the above syntax, let us create a table. The query to create a table is as follows −mysql> create table removeSpaceDemo -> ( -> Id int NOT NULL AUTO_INCREMENT, -> UserId varchar(20), -> UserName varchar(10), -> PRIMARY KEY(Id) -> ); Query OK, 0 rows affected (0.81 sec)Insert some records in the table using insert command. The query is as follows −mysql> insert into removeSpaceDemo(UserId, ...
Read MoreMySQL query to group data in the form of user login time per hour and get the records of the users logged in the recent hour?
You can use a subquery with JOIN condition for this. The syntax is as follows −SELECT yourTablevariableName.* FROM ( SELECT MAX(UNIX_TIMESTAMP(yourDateTimeColumnName)) AS anyAliasName FROM getLatestHour GROUP BY HOUR(UserLoginDateTime) ) yourOuterVariableName JOIN yourTableName yourTablevariableName ON UNIX_TIMESTAMP(yourDateTimeColumnName) = yourOuterVariableName.yourAliasName WHERE DATE(yourDateTimeColumnName) = 'yourDateValue';To understand the above syntax and the result to be achieved, let us create a table. The query to create a table is as follows −mysql> create table getLatestHour -> ( -> UserId int, -> UserName varchar(20), -> UserLoginDateTime ...
Read MoreHow to set target and action for UIBarButtonItem at runtime?
To create a bar button action at run time we’ll need to go through a few steps. First of all let’s start by creating a new project.Once you have created the project, go to it’s storyboard directly, select the ViewController and Embed it into a navigation controller.Now go to the respective View controller class and inside it, we’ll perform some steps that will add a button to the navigation bar on run time.Create an objc function that should be called when the button is pressed.@objc func barButtonAction() { print("Button pressed") }Now add the viewWillLayoutSubviews method to your class.First, we’ll ...
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