Type inference or deduction refers to the automatic detection of the data type of an expression in a programming language. It is a feature present in some strongly statically typed languages. In C++, the auto keyword(added in C++ 11) is used for automatic type deduction. For example, you want to ... Read More

While adding columns to an existing table with the help of ALTER command we can specify the default value also.SyntaxAlter table table-name ADD (column-name datatype default data);ExampleIn the example below, with the help of ALTER Command, column ‘City’ is added with default value ‘DELHI’ to the table ‘Student’.mysql> Alter table ... Read More

The relationship between parent and child table is One-to-Many relationship. It can be understood with the example of two tables named ‘customer’ and ‘orders’. Here, ‘customer’ is the parent table and ‘orders’ is the child table. The relationship is one-to—many because a customer can have more than one order. It ... Read More

To set the outline color, use the outlineColor property. You can try to run the following code to set the color of the outline around an element with JavaScript:ExampleLive Demo                    #box {             width: ... Read More

Generally, the information is present in the obsolete function module documentation itself. Here is snapshot of information for “DOWNLOAD” function.

The temporary tables are session specific. So you would require to use truncate instead of delete as followstruncate table #temptable;Also, could you please check your release? In the recent releases, delete also works fine. Here is an example:Drop table #temptable; Create local temporary table #temptable(id integer, str nvarchar(30)); Insert into ... Read More

Please follow the steps below to make it functional.First, open the screen painterNow, double click on the button you want to make functionalAbove “Context Menu Form", you will find a field to enter Functional code where you enter the functional code.This will convert your button to functional trigger theOK code ... Read More

This can be done by using UNION or UNION ALL operator as followsselect id, Empl_name, DeptId from table1 union select id, Empl_name, DeptId from table2 The difference between UNION and UNION ALL is that UNION removes the duplicates while UNION ALL shows duplicates as well.

When we execute certain SQL queries (SELECT query in general) they return tabular data.The java.sql.ResultSet interface represents such tabular data returned by the SQL statements.i.e. the ResultSet object holds the tabular data returned by the methods that execute the statements which quires the database (executeQuery() method of the Statement interface in ... Read More

The getColumnDisplaySize() method of the ResultSetMetaData (interface) retrieves the display size of a particular column.This method returns an integer value representing the display size of the column.To get the ResultSetMetaData object, you need to −Register the Driver: Select the required database register the Driver class of the particular database using ... Read More