Teradata Study Guide

JDBC: Java Database Connectivity (JDBC) provides Java developers with a standard API (application Programming Interfaces) that is used to access databases regardless of the driver and database product. To use JDBC you'll need at least JDK 1.1 a database and a JDBC driver. There are several characteristics of JDBC:ODBC : ODBC is the acronym for Open DataBase Connectivity a Microsoft Universal Data Access standard that started life as the Windows implementation of the X/Open SQL Call Level Interface specification. ODBC Driver Manager - an application binds to this generic library which is responsible for loading the requested ODBC Driver. ODBC Driver - dynamically loaded by the ODBC Driver manager for making connection to target Database. Difference b/w them is 1.ODBC is for Microsoft and JDBC is for java applications. 2.ODBC can't be directly used with Java because it uses a C interface. 3.ODBC makes use of pointers which have been removed totally from java.

Table Type Specifications of SET VS MULTISET There are two different table type philosophies so there are two different type tables. They are SET and MULTISET. It has been said, “A man with one watch knows the time, but a man with two watches is never sure”. When Teradata was originally designed it did not allow duplicate rows in a table. If any row in the same table had the same values in every column Teradata would throw one of the rows out. They believed a second row was a mistake. Why would someone need two watches and why would someone need two rows exactly the same? This is SET theory and a SET table kicks out duplicate rows. The ANSI standard believed in a different philosophy. If two rows are entered into a table that are exact duplicates then this is acceptable. If a person wants to wear two watches then they probably have a good reason. This is a MULTISET table and duplicate rows are allowed. If you do not specify SET or MULTISET, one is used as a default. Here is the issue:

Definition: Teradata SQL Assistant (TSA), as part of Teradata Tools and Utilities (TTU), is an ODBC-based client utility used to access and manipulate data on ODBC-compliant database servers. It has two editions: 1) Teradata SQL Assistant for Microsoft Windows 2) Teradata SQL Assistant/Web Edition Teradata SQL Assistant is an information discovery tool designed for Windows XP and Windows 2000. Teradata SQL Assistant retrieves data from any ODBC-compliant database server. The data can then be manipulated and stored on the desktop PC. Teradata SQL Assistant/Web Edition is a web-based query tool that allows you to compose queries, submit them to the Teradata Database, and then view the results in a web browser. Overview : Teradata SQL Assistant for Microsoft Windows, originally called "Queryman" (before V. 6.0)or "QueryMan" (V. 6.0 and up), is also known as "SQLA" among programmers. It supports import / export tasks, but not the serious ones. Wit