SQL Server: SUBSTRING Function. This SQL Server tutorial explains how to use the SUBSTRING function in SQL Server (Transact-SQL) with syntax and examples. In SQL Server (Transact-SQL), the SUBSTRING functions allows you to extract a substring from a string.
Observational Research Methods. Observational research is a group of different research methods where researchers try to observe a phenomenon without interfering too much. Observational research methods, such as the case study, are probably the furthest removed from the established scientific method.This type is looked down upon, by many scientists, as â quasi-experimental â research, although this is usually an unfair criticism.xperimental Research Methods. The first method is the straightforward experiment, involving the standard practice of manipulating quantitative, independent variables to generate statistically analyzable data. Generally, the system of scientific measurements is interval or ratio based.
Statistics: Scientific method Â· Research methods Â· Experimental design Â· Undergraduate statistics courses Â· Statistical tests Â· Game theory Â· Decision theory. Unobtrusive research (or unobtrusive measures) is a method of data collection used primarily in the social sciences.The term unobtrusive measures was first coined by Webb, Campbell, Schwartz, & Sechrest in a 1966 book titled Unobtrusive methods: Nonreactive research in the social science.They described methodologies which do not involve direct elicitation of data from the research subjects.nobtrusive measures are contrasted with interviews and questionnaires, in that they try to find indirect ways to obtain the necessary data. The unobtrusive approach often seeks unusual data sources, such as garbage, graffiti and obituaries, as well as more conventional ones such as published statistics.