SELECT AND CONSUME Example | SQL Statements | Teradata Vantage - 17.05 - Example: Returning the Row Having the Oldest QITS Value in a Queue Table - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - SQL Data Manipulation Language

Product
Advanced SQL Engine
Teradata Database
Release Number
17.05
Release Date
January 2021
Content Type
Programming Reference
Publication ID
B035-1146-175K
Language
English (United States)

This CREATE TABLE statement creates a queue table named shopping_cart:

     CREATE SET TABLE shopping_cart, QUEUE (
       cart_qits  TIMESTAMP(6) NOT NULL DEFAULT CURRENT_TIMESTAMP(6),
       product_id INTEGER,
       quantity   INTEGER )
   PRIMARY INDEX (product_id);

This SELECT AND CONSUME statement returns all the columns of the row with the oldest value in the cart_qits column of the shopping_cart table:

     SELECT AND CONSUME TOP 1 * FROM shopping_cart;