working on SeqScan.java
Merge branch 'master' of https://github.com/simzou/cs143-simpledb
starting answers.txt
added more to answers.txt
Merge branch 'master' of https://github.com/simzou/cs143-simpledb
Merge branch 'master' of https://github.com/simzou/cs143-simpledb
Merge branch 'master' of https://github.com/simzou/cs143-simpledb