Generate Serial Number in SQL
The next query generates results as below. Suppose we want to add a column with serial numbers, just as below. In MySQL, this can be done by defining a variable in the query: Reference: MySQL User Defined Variables
Loops in Java
While Loop A loop allows us to execute a block of statements multiple times. The following is a while loop printing out values from 0 to 9. When we run the code, the condition is first evaluated. If it is …
A Dynamic Array Class in Java
Design a Class for Dynamic Arrays In Java, the size of an array is fixed when it is created. Elements are not allowed to be inserted or removed. However, it is possible to implement a dynamic array by allocating a …
Conditionals in Java
Boolean expressions A boolean expression is an expression that evaluates either true or false. A boolean expression may use equality operators (==, !=), relational operators (>, >=, <, <=) or logical operators (!, &&, ||). Equality and relational operators compare …