The embodiment of the invention discloses an SQL (Structured Query Language) resolver and method. The device comprises an input interface module, an SQL parsing engine and an output interface module,wherein the input interface module, the SQL paring engine and the output interface module are in communication connection in sequence; the above input interface module is used for mapping received multiple types of data into a data stream of a preset form according to a preset conversion rule, and sending to the SQL parsing engine; the SQL parsing engine is used for processing the data stream of the above preset format into a grapheme stream, a format file and an abstract syntax tree object in sequence, and sending to the output interface module; and the output interface module is used for mapping the abstract syntax tree object into a required type of data stream to be output. The method is realized on the basis of the above device. The resolver and the method can be in loose coupling connection with other large-scale projects, and SQL can be independently operated for parsing. In addition, the resolver and the method can be integrated to an API (Application Program Interface) so as to bring convenience for the SQL resolver to be subjected to seamless connection with other applications, and a parsing result is quickly shown.