15.10 - Example: Changing the Value Compression for a Compressed Column - Teradata Database

Teradata Database SQL Data Definition Language Syntax and Examples

Product
Teradata Database
Release Number
15.10
Published
December 2015
Language
English (United States)
Last Update
2018-06-05
dita:mapPath
SQL_DDL_15_10.ditamap
dita:ditavalPath
ft:empty

Suppose a company that does business only in Santa Monica decides to expand. Previously, the city name Santa Monica was value-compressed. Now, the city name Los Angeles is to be value-compressed. The following example changes the single value-compressed city name value from Santa Monica to Los Angeles, which means that it should also be value-compressed:

     ALTER TABLE customer ADD city_name COMPRESS 'Los Angeles';

If city_name had not been multivalue-compressed previously, this request would multivalue-compress all occurrences of Los Angeles. Note that this is just an example, because Santa Monica and Los Angeles can be multivalue-compressed.