the Interesting Work in My Job Today I'd like to introduce what I have been doing in my job. For many people software development is an interesing job and the developers are a group of intelligent people. Actually, it is not as difficult as expected. It just need that you think normally and you don't need to be a talent. My work runs around a SQL (Structured Query Language) language parser, which accepts a string containing a SQL sentence and parses it into a tree with many grammar nodes. I need add processing logics on these nodes. For example, if the sentence is "I am a boy", it will be parsed as a tree with a tree like below: Root Node(Sentence) / | \ ( I) (am) (a boy) Subject node Action Node Object node / \ a boy (Artical Node) (Noun node) To generate such a parsing tree, you need a parser first. You don't need write a parser by yourself since there are many free and open sourced parser generators. The one that I use is Antler, which was invented by a computer professor in an US university. The Antler tool let you create your own language parser and you just provide your grammar file complying with the writing rules. For instance, you write the following grammar file. Sentence: Subject Action Object ; Subject: Noun ; Action: Verb ； Object： Article？ Noun ； Noun: 'I' | 'He' | 'She' | 'boy' ; Verb: 'am‘ ; Article: a | A | the | The ; ......... With above grammar file, Antler compiles it and generates a parser for this specific language. "I am a boy" will be a valid sentence and parsed successfully.