SQL: HAVING Clause
The Having clause is optional and used in combination with the Group By clause. It is similar to the Where…
Month: September 2022
SQL: GROUP BY
The aggregate functions, such as Sum, Count, Min, or Max are used to produce grand totals. Values output by them…
SQL: ORDER BY
In all the queries we’ve seen so far, the rows in the result table have not been ordered in any…
SQL: AND & OR conditions
The scope of the Where clause and the operators used with it can be extended by using the logical operators…
SQL: WHERE Clause
One of the most useful feature of the SQL query, since it allows you to selectively retrieve only those rows…
SQL query results
SQL Query Results To see how SQL works, please copy the SQL statements and paste them into the textarea, or…
SQL query results
SQL Query Results To see how SQL works, please copy the SQL statements and paste them into the textarea, or…
PHP: Variables
A variable is a holder for a type of data. So, based on its type, a variable can hold numbers,…
PHP: Constants
Constants just as variables are used to store information. The main difference between constants and variables is that constant value…
PHP: Functions
A function is a block of code which can be called from any point in a script after it has…