12.21 Compressed tables

Organization of this section
12.21.1 Data compression facility
12.21.2 How data is compressed
12.21.3 How to define a compressed table
12.21.4 How to convert an existing table to a compressed table
12.21.5 How to change the definition of a compressed column (removing the compression specification for a column)
12.21.6 Notes about using compressed tables
12.21.7 How to measure the data compression rate