Loading Data Froma A Text File To SQL Data Base

Hello!! searching information about how to migrate some date from an old data base (any tipe) from SQL I´v found this:
LOAD DATA [LOW_PRIORITY | CONCURRENT] [LOCAL] INFILE 'file_name.txt'
[REPLACE | IGNORE]
INTO TABLE tbl_name
[FIELDS
[TERMINATED BY 'string']
[[OPTIONALLY] ENCLOSED BY 'char']
[ESCAPED BY 'char' ]
]
[LINES
[STARTING BY 'string']
[TERMINATED BY 'string']
]
[IGNORE number LINES]
[(col_name_or_user_var,...)]
[SET col_name = expr,...)]
Does anybody know how does it works and how to use it????I´d like to know because I have to load data from a text file to a SQL Data Base and this seems to be te fastest an easiest way to do it...Thanks!!!!bye!