2017/09/25

- ROWNUM, JOIN, GROUP BY, SUB-QUERY

- LOWER, TO_CHAR(DATE_FORMAT, 'YYYY'), ||, JOIN ON, HAVING, CASE WHEN THEN WHEN THEN ... END

- IN, EXIST, ...  IN ( , ), SOME, ANY, ALL

 Today was very much like another. Arriving at SDS tower in the morning and I sat on the chair taking SQL class. It was quite interesthing class; it can improve querying skill through practicing writing SQL statement.

Plus, I noticed that there are a few SQL monster in this class. I personally thought that I can beat those people who don't consider self-management seriously.