Continuing to fill the literature gap, this research replicated and expands a prior study of student performance in database normalization in an introductory database course. The data was collected from four different universities, each having different prerequisite courses for their database course. Student performance on a database normalization exam was compared between students who took the various studied prerequisite courses (CS1 procedural programming, CS2 object-oriented programming, and discrete mathematics) and those who did not. These comparisons were conducted using quantitative methods and produced non-significant results, different from those results of the prior study. With the current research design and sample size, the researchers are confident in their results that suggest these prerequisite courses do not impact student performance.