This MySQL function reads the contents of a file and returns it as a string that may be used in MySQL statements and functions.
Below is the syntax for this command. Text within square brackets (i.e, [ and ] ) are optional. Choices are separated by bars (i.e, | ). Ellipses preceded by a comma indicates a repeating pattern. Ellipses before or after syntax are used to highlight a relevant except from the larger syntax. Text displayed in italic letters represent text that should be replaced with the specific names related to the database (e.g., column with the name of the column).
This function reads the contents of a file and returns it as a string that may be used in MySQL statements and functions. The user must have FILE privileges in MySQL, and the file must be readable by all users on the filesystem. It returns NULL if the file doesn't exist, if the user doesn't have proper permissions, or if the file is otherwise unreadable. The file size in bytes must be less than the amount specified in the system variable max_allowed_packet. Starting with version 5.1.6, the system variable character_set_filesystem is used to provide filenames in the character set recognized by the underlying filesystem.
UPDATE applications SET essay = LOAD_FILE('/tmp/applicant_7382.txt'), student_photo = LOAD_FILE('/tmp/applicant_7382.jpeg') WHERE applicant_id = '7382';
In this example, an essay written by someone who is applying for admission to the college is loaded into the essay column (which is a TEXT datatype) of the row for the applicant in the applications table. The entire contents of the file, including any binary data (e.g., hard returns and tabs), are loaded from the file into the table. Additionally, an image file containing the student's photograph is loaded into another column of the same table, but in a BLOB column.