明天要到一个学校面试一个researcher职位，duty主要是
1 Developing and maintaining SAS and SQL programs to utilize longitudinal,
relational databases for research purposes.
2 Run record-linkage software to match large datasets at the individual-level.
3 Creating and maintaining programs that "normalize" legacy systems data into
research-ready relational database form.
针对这3个怎么准备比较好，会被问什么样的问题呢？
