Any organization that will develop software is faced with a difficult choice of choosing the right software development method. Whereas the software development methods used, play a significant role in the overall software development process. Software development methods are needed so that the software development process can be systematic so that it is not only completed within the right time frame but also must have good quality. There are various methods of software development in System Development Lyfe Cycle (SDLC). Each SDLC method provides a general guiding line about different software development and has different characteristics. Each method of software development has its drawbacks and advantages so that the selection of software development methods should be compatible with the capacity of the software developed. This paper will compare three different software development methods: V-Shaped Model, Parallel Development Model, and Iterative Model with the aim of providing an understanding of software developers to choose the right method. General TermsSoftware Development Comparison, Software Engineering KeywordsIterative Model, Parallel Development Model, System Development Life Cycle, V-Shaped Model.

Optimization of a database query becomes one of the critical phases in data processing handling. Database optimization is needed to make a structured query language more concise and efficient. This study aims to conduct experiments with structured query language modifications compared to structured query language examples commonly used in the manufacture of software. This study uses a database with a record large enough to try to implement its SQL. The results of the experiments of all modified query writing are more efficient than the queries used by the information system in the database regarding data processing time.