ISQLTutorial2.sql | HP c-tree-SQL ISQL and Tools guide

ISQL and Tools

2.2RELATIONAL MODEL AND INDEXING TUTORIAL

iSQL_Tutorial2.sql

This intermediate tutorial will advance the concepts introduced in the first tutorial by expanding the number of tables and building a relational model. This tutorial will walk you through defining an index for each table, demonstrating the power of indexes in a rela- tional model using a few simple API calls.

This tutorial operates on the assumption that the database named 'myDatabase', already exists. Please refer to Section 3.6 “Introduction to the c-treeSQL ISQL Utility” in c-tree Plus Quick Start and Product Overview Guide for details on how to set up the environment for the tutorial.

This example, like all others in this set of documentation, will take the creation and use of a database and fit it into a simple four step flow of initialization, definition, management, and completion. (Init, define, manage, and you're done!)

Now let's break into the four areas.

2.2.1Init

The initialize step is as simple as launching the iSQL tool. The syntax for this is as follows:

isql [-u user_name] [-a password] [connect_string]

At the command line prompt type:

isql -u ADMIN -a ADMIN myDatabase

iSQL responds with the following prompt:

ISQL>

At this point, any valid SQL statement terminated with a semi-colon may be submitted.

2.2.2Define

In this case define consists of the CREATE TABLE statement. This is done in a single iSQL statement in which specific fields are defined. Upon successful creation of the table, the changes made to the database by this transaction are made permanent by executing the COMMIT WORK statement.

Relational Database

This process of defining tables and indices is in actuality creating

a relational database. For the sake of simplicity, we will not be enforcing constraints use in this tutorial. In this example there are 4 tables being defined as depicted in the drawing below. The fields that make up the index are shown in bold italics.

2-4	FairCom Corporation

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HP c-tree-SQL ISQL and Tools manual Relational Model and Indexing Tutorial, ISQLTutorial2.sql

Contents

Isql and Tools Reference Guide For use with c-treeSQL ServerPage Table of Contents Data Load Utility dbload Tutorial Source Code Iii FairCom Corporation Purpose of this Manual Syntax Diagram ConventionsDocumentation Overview Audience Related Documentation Isql and Tools Introduction Overview Isql and Tools FairCom Corporation Init Quick TourIntroductory Tutorial Isql Isql Create Table Custmast DefineManage Isql Commit Work Custmast Quick Tour DoneComplete Introductory Tutorial Code Relational Model and Indexing Tutorial ISQLTutorial2.sql Quick Tour Values Insert IntoValues Insert Into Commit Work QTY Price Complete Relational Model and Indexing Tutorial Source Code Locking Tutorial ISQLTutorial3.sql @ISQL @iSQLTutorial3.sql Isql Delete from Custmast Complete Locking Tutorial Source Code Transaction Processing Tutorial ISQLTutorial4.sql Transaction Rollback Work Complete Transaction Processing Tutorial Source Code Syntax Isql StatementsStarting Interactive SQL Arguments Username PasswordStatement History Support Connectstring Isql Statements for Statement History Support Formatting Output of Isql QueriesIsql Statements Statement Summary Isql Statements for Query Formatting Summary Display Example 3-1 Unformatted Query Display from Isql Customername Customercity Orderid Ordervalue Formatting Column Display with the Column Statement Example 3-2 Controlling Display Width of Character Columns Customername Customercity Example 3-3 Customizing Format of Numeric Column DisplaysOrdervalue Example 3-4 Specifying Column Breaks and Values with Display Numorders Customername Example 3-6 Specifying a Query Header and Footer with Title Help and Table Statements Transaction Support Description Isql Reference1 @ Execute Syntax Example Break Syntax Breakspec Customername ExamplesSkip n Clear Syntax History Option ArgumentColumn Syntax Break Column Compute Display Title Heading headingtext ColumnnameFormat formatstring Date-Time Format Strings for the Column Statement Character Description Char Null ? Type Length ColnameNot Null INT Sysdate OrderinfoAmount NEW Title FLDColumn Title Compute AVG MAX MIN SUM Count Variablename Define Syntax Value COL columnnumber ColpositionDisplayvalue @columnname Edit Syntax Exit Exit or Quit SyntaxRelated Statements 10 GET Syntax Isql GET query.sql Isql RUN History Syntax Help CommandsclausesHelp Syntax Orderstate Lotlocation Following example illustrates usage of the History statement From HostcommandHost or SH or Syntax List Syntax Quit Quit or Exit Syntax16 RUN Syntax Isql History Pagesize Save Syntax18 SET Syntax Linesize Pagesize numberlines Isql Break on Isql Select TBL from Systables TBL Connection databasename DefaultTransaction Isolation Level isolationlevel TBL Show Syntax Filename on Is Default ?Spool Syntax Database Connections Isql Spool STK on Start SyntaxArgument … Isql Spool OFF Null ? Type Length Colname Not Null INT Not Null Varchar Date TablenameType Length Colname Null ? Text Title SyntaxLeft Center Right COL n Double Isql Clear Title Isql and Tools FairCom Corporation Data Load Utility dbload Introduction Prerequisites for Dbload Dbload Command Line SyntaxCommandsfile Options Data File Formats Data Load Utility dbload Fixed Length Records Commands FileVariable Length Records Next Record Define Record Statement Char Short Long Float Double For Each Statement Null Example 4-1 Sample dbload commands files Examples Position not specified for fixed length record Compilation ErrorsRecord name redefined Fatal Errors Isql and Tools FairCom Corporation Data Unload Utility dbdump Prerequisites for Dbdump Dbdump Command Line Syntax Data Unload Utility dbdump Short Long Float Double For Record Statement Define Record custrec of Fixed Length 37 AS Isql and Tools FairCom Corporation Schema Export Utility dbschema Username.tablename Username.procedurenameOutfile Username.triggername Import Begin Schema Export Utility dbschemaDbschema END Isql and Tools FairCom Corporation Tutorial Source Code Commit Work Select * from Custmast Delete from Custmast VARCHAR6 IntegerMoney Tutorial Source Code Commit Work Delete from Custmast Imdesc VARCHAR48 Select * from orderlist Select * from orderitems Isql and Tools FairCom Corporation Symbols Index-i Isql Index-ii FairCom Corporation Index Index-iii FairCom Corporation