Delta encoding - Amazon RedshiftDelta encodings are very useful for date time columns. Delta encoding compresses data by recording the difference between values that follow each other in the column. This difference is recorded in a separate dictionary for each block of column values on disk. (An Amazon Redshift disk block occupies 1 MB.) For example, suppose that the column contains 10 integers in sequence from 1 to 10. The firs
JAWS UG中央線 LT Redshift Compression Encodings（圧縮アルゴリズム）
