A method of multithreading extraction of data from a database is provided. The method comprises: acquiring a set of primary key character strings, the primary key character strings being uniquely associated with the data to be extracted from the database; extracting, from the primary key character strings, a first character string and a second character string; generating a first integer and a second integer based on: a preset base number, positions of characters included in the first and second character strings; determining a node segment based on the first and second integers, the node segment being associated with a node segment integer; converting the node segment integer to a node segment character; and generating an extraction statement associated with a thread for the node segment character converted from the node segment integer. The extraction statement can then be transmitted to a database when the thread is executed.