Create README

ParquetExamples/README.md

@@ -0,0 +1,25 @@
+# Parquet Example Data
+
+Parquet data can be stored in many different ways - with or without metadata, in key-value partitioned directories, or in flat partitioned directories. This directory contains a simple dataset stored in all of these different formats. These are used to demonstrate Deephaven's ability to read various kinds of Parquet data.
+
+
+## The `grades` dataset
+
+The `grades` dataset is a simple synthetic dataset used to demonstrate the various ways to store Parquet data. It looks like this:
+
+| Name | Class | Test1 | Test2 |
+| ---- | ----- | ----- | ----- |
+| Ashley | Math | 92 | 94 |
+| Jeff | Math | 78 | 88 |
+| Rita | Math | 87 | 81 |
+| Zach | Math | 74 | 70 |
+| Ashley | Science | 87 | 91 |
+| Jeff | Science | 90 | 83 |
+| Rita | Science | 99 | 95 |
+| Zach | Science | 80 | 78 |
+| Ashley | History | 82 | 88 |
+| Jeff | History | 87 | 92 |
+| Rita | History | 84 | 85 |
+| Zach | History | 76 | 78 |
+
+This dataset can be partitioned by `Name` or `Class` to demonstrate the different ways to store Parquet data.