How do you sort data in descending order in SQL?

The SQL ORDER BY Keyword The ORDER BY keyword is used to sort the result-set in ascending or descending order. The ORDER BY keyword sorts the records in ascending order by default. To sort the records in descending order, use the DESC keyword.

How do I sort alphabetically in SQL?

If you want to sort based on two columns, separate them by commas. For example, ORDER BY LAST_NAME ASC, FIRST_NAME DESC; would display results sorted alphabetically by last name. If the same LAST_NAME matches multiple FIRST_NAME entries, the results of FIRST_NAME will also display in descending order.

Which function sort associative array in descending order according to the value?

arsort() – sort associative arrays in descending order, according to the value. krsort() – sort associative arrays in descending order, according to the key.

How do I scan a directory in PHP?

To check if a folder or a file is in use, the function is_dir() or is_file() can be used. The scandir function is an inbuilt function that returns an array of files and directories of a specific directory. It lists the files and directories present inside the path specified by the user.

What is DESC command in SQL?

So desc or describe command shows the structure of table which include name of the column, data-type of column and the nullability which means, that column can contain null values or not.

How do I order alphanumeric in SQL Server?

To do this, we’ll use two string functions:

LEN(expression) – Returns the number of characters found in an expression. LEN(‘MICHIGAN’) returns 8 .
LEFT(expression, length) – Starting from the left, position 1 , this function returns the length amount of characters. LEFT(‘Airplane’,3) returns ‘ Air ‘.

What is ASC in SQL?

The SQL ASC keyword specifies an ascending sort order for a column within in the ORDER BY clause. This means the values are sorted in A to Z order.

Which function sort associative array in ascending order according to the key?

The ksort() function sorts an associative array in ascending order, according to the key. Tip: Use the krsort() function to sort an associative array in descending order, according to the key. Tip: Use the asort() function to sort an associative array in ascending order, according to the value.

Which of the following functions sorts an array in descending order?

Answer: C. sort() function is used to sort in ascending order where as rsort() meaning reverse sort is used for sorting in descending order.

What is Instanceof PHP?

The instanceof keyword is used to check if an object belongs to a class. The comparison returns true if the object is an instance of the class, it returns false if it is not.

How do you iterate through an array in PHP?

To iterate over all elements of an indexed array, you use the following syntax:

php foreach ($array_name as $element) { // process element here }
php $colors = [‘red’, ‘green’, ‘blue’]; foreach ($colors as $color) { echo $color . ‘<
php foreach ($array_name as $key => $value) { //process element here; }

Which is the default sorting order in scandir?

Specifies the sorting order. Default sort order is alphabetical in ascending order (0). Set to SCANDIR_SORT_DESCENDING or 1 to sort in alphabetical descending order, or SCANDIR_SORT_NONE to return the result unsorted Optional. Specifies the context of the directory handle.

How to use scandir function to list files?

As scandir output is an array, we can apply all array function to this output. $ar=scandir (‘.’); $ar=scandir (‘..’); We can develop a small script which will first list file and directory of current directory.

What is the default order of sort in PHP?

If used then sort order is alphabetical in descending order. The default is alphabetical ascending order. Context is a set of parameters and wrapper specific option which modifies or enhance the behavior of a string. An array of filenames on success, or FALSE on failure.

When was the last update of PHP scandir function?

PHP: scandir() function. Last update on September 19 2019 10:39:04 (UTC/GMT +8 hours) The scandir() function generates a list of file and directory inside a given path.