Example: Collecting Multi-Column PARTITION Statistics - Analytics Database - Teradata Vantage

SQL Data Manipulation Language

Deployment
VantageCloud
VantageCore
Edition
Enterprise
IntelliFlex
VMware
Product
Analytics Database
Teradata Vantage
Release Number
17.20
Published
June 2022
Language
English (United States)
Last Update
2024-10-04
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lifecycle
latest
Product Category
Teradata Vantageā„¢

This example collects multi-column sampled statistics on the following column set for the row-partitioned orders table and writes them to a user-defined QCD called myqcd:

  • System-derived PARTITION column
  • quant_ord
  • quant_shpd

Because you are requesting multicolumn statistics, the system honors the specified sampling percentage of 20 percent, unlike the case for single-column PARTITION statistics. See Collecting QCD Statistics on the PARTITION Column of a Table and Example: Collect Statistics on a Single-Column NUSI.

     COLLECT STATISTICS FOR SAMPLE 20 PERCENT
     ON orders COLUMN (quant_ord, PARTITION, quant_shpd)
     INTO myqcd;