16.20 - Example: Collecting Multicolumn PARTITION Statistics - Teradata Database - Teradata Vantage NewSQL Engine

Teradata Vantage™ SQL Data Definition Language Syntax and Examples

Product
Teradata Database
Teradata Vantage NewSQL Engine
Release Number
16.20
Published
March 2019
Language
English (United States)
Last Update
2019-05-24
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This example collects multicolumn statistics on the following column set for the orders table.

  • System-derived PARTITION column
  • quant_ord
  • quant_shpd
         COLLECT STATISTICS ON orders 
         COLUMN (quant_ord, PARTITION, quant_shpd);

Teradata Database honors the column ordering that you specify. The recommended best practice is to specify the PARTITION as the first column for multicolumn PARTITION statistics. Collecting single-column PARTITION statistics is recommended for partitioned and nonpartitioned tables. However, multicolumn PARTITION statistics are only potentially useful for row partitioned tables.