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We developed a free compression tool, which you can download from our website (the documentation, 15 pages, is included)

Hi All,
I would like to know If there would be any impact of I/O if we perform any join operations or filter operations on the compressed column considering compression property is majorly a space saving technique.
Hope I made myself clear.

Besides collecting statistics on your columns on your Teradata database, the compressing of the data to save disk space is a very important maintaining task. So why not connect these two tasks? The idea is to extract the values for the multi value compression of the columns out of the collected statistics.

The "SHOW STATISTICS VALUES COLUMN col ON db.tab; " shows the Biased values of the statistics. In my opinion this is exactly a very good list for multi value compression.

[Teradata 13.1] Why? (CREATE TABLE or ALTER TABLE)



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