SQL Statements and SQL Requests | SQL Fundamentals | Teradata Vantage - 17.10 - SQL Statements and SQL Requests - Advanced SQL Engine - Teradata Database

Teradata Vantageā„¢ - SQL Fundamentals

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Release Date
July 2021
Content Type
Programming Reference
Publication ID
B035-1141-171K
Language
English (United States)
In Teradata SQL, a statement, a syntactic concept, has three components:
  • A statement keyword, such as SELECT, CREATE TABLE, or ALTER PROCEDURE
  • Zero or more expressions, functions, keywords, clauses, or phrases, such as WHERE, PRIMARY KEY, or UNIQUE PRIMARY INDEX
  • A semicolon
In Teradata SQL, a request defines a unit of work that is transmitted from a client application to the database in a single message. A request is a semantic concept that has several components, including:
  • One or more SQL statements
  • Request-level CLIv2 options parcel
  • Metadata about the request data

All individual SQL statements, called single statement requests, are also individual SQL requests, but not all SQL requests are also SQL statements because one request can contain an unlimited number of SQL statements. This special case is called a multistatement request, and it is the primary superficial characteristic that distinguishes a statement from a request in the Teradata world.

Related Information

For more information about multistatement requests, see Multistatement Requests.