PHP – usleep() Function
The PHP usleep() function delays execution of the current script for a specified number of microseconds (one millionth of a second).
PHP – usort() Function
The PHP usort() function sorts an array by values using a user-defined comparison function.
PHP – while Keyword
The PHP while keyword is used to create a while loop and is also used to set the looping condition of a do…while.
PHP – xor Keyword
The PHP xor keyword is a logical operator that’s return value will only be true if one of the statements is true and the other one is false.
PHP – yield Keyword
The PHP yield keyword is used to create a generator function which acts as iterators which can be looped through with a foreach loop.
PHP – yield from Keyword
The PHP yield from keyword is used to create a generator function which acts as iterators which can be looped through with a foreach loop.
SQL – ALTER Keyword
The ALTER keyword adds, deletes, or modifies columns in a table. It can also add and delete various constraints in a table.
SQL – AND Keyword
The AND keyword is used with the WHERE keyword to only include rows where both conditions is true.
SQL – AS Keyword
The AS keyword is used to output a column or table with a temporary alias for the duration of the query. Nothing in the database itself is altered.
SQL – BACKUP DATABASE Keywords
The BACKUP DATABASE keywords are used in SQL Server to create a full back up of an existing SQL database.
SQL – BETWEEN Keyword
The BETWEEN keyword is used to select values (numbers, text, or dates) within a given range (inclusively).
SQL – CASE Keyword
The CASE keyword is used is to create different output based on various conditions.
SQL – CHECK Keyword
The CHECK keyword is a constraint that limits the value that can be placed in a column.
SQL – COLUMN Keyword
The COLUMN keyword is used to change the data type of a column or delete a column in a table.