To get a JavaScript stack trace, simply add the following in your code. It will display the stack trace −Example Live Demo                    function stackTrace() {             var err = new Error();             return err.stack;          }          console.log(stackTrace());          document.write(stackTrace());                     Stacktrace prints above.     Output

We can use the if...else condition in PHP script to prepare a query based on the NULL value. To illustrate it we are having the following example −ExampleIn this example, we are using the table named ‘tcount_tbl’ having the following data −mysql> SELECT * from tcount_tbl; +-----------------+----------------+ | tutorial_author | tutorial_count | ... Read More

PHP uses a mysql_query function to insert data into an existing MySQL table. This function takes two parameters and returns TRUE on success or FALSE on failure. Its syntax is as follows −Syntaxbool mysql_query( sql, connection );Followings are the parameters used in this function −S. No.Parameter & Description1.SqlRequired - SQL query ... Read More

We can change the name of a particular existing column from a MySQL table by using CHANGE statement along with ALTER statement. Its syntax would be as follows −SyntaxALTER TABLE table_name CHANGE old_column_name new_column_name datatype;Here,  table_name is the name of the table from which we want to delete the column.Old_column_name ... Read More

When we use the GROUP BY clause in the SELECT statement without using aggregate functions then it would behave like the DISTINCT clause. For example, we have the following table −mysql> Select * from testing; +------+---------+---------+ | id   | fname   | Lname   | +------+---------+---------+ |  200 | ... Read More

With the help of the MySQL SUM() function, we can get the total value by category in one output row. For example in table ‘ratelist’ if we want to get the total value of category ‘price’ then we can use SUM() on price as follows −mysql> select SUM(price) as totalprice ... Read More

Whenever an exception occurred in MySQL stored procedure, it is very important to handle it by throwing a proper error message. Suppose, if we do not handle the exception, there would be a chance to fail application with that certain exception in a stored procedure. MySQL provides a handler to ... Read More

You can try to run the following code to rotate div with matrix transforms using CSS:ExampleLive Demo                    div {             width: 300px;             height: 100px;           ... Read More

The word-wrap property is used to break the line and wrap onto next line.ExampleThe following shows sample syntax −Live Demo                    div {             width: 200px;             border: 2px solid #000000;          }          div.b {             word-wrap: break-word;          }                     word-wrap: break-word property       ThisisdemotextThisisdemotext:       thisisaveryveryveryveryveryverylongword. The long word wraps to       the next line.     Output

The TRUNCATE() function is used to return the value of X truncated to D number of decimal places. If D is 0, then the decimal point is removed. If D is negative, then D number of values in the integer part of the value is truncated. Consider the following example ... Read More