2019-05-20 Mon

I attended Effective SQL reading session.

You can use range conditions like: min <= value and value <= max in join clause.

It's seems to useful in case that you would like to put ranks in clear ranges.

In the case, you need to prepare a tally table that represents the ranges.

2019-05-12 Sun

I participated English chat sessions.

I had lunch with some members after the session.

After the lunch, I visited a coffee shop.

The customers of the coffee shop was distinct.

Some guys open their laptop, or some person crafts something.

Then I hopped to a comedy house in Asakusa.