HP c-tree-SQL ISQL and Tools manual @ISQL @iSQLTutorial3.sql

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ISQL and Tools

2.3.2Define

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. The following SQL syntax provides the functionality for the define phase:

CREATE TABLE - Create a table.

COMMIT WORK - Make changes permanent. Below is the interactive SQL for DEFINE:

ISQL> CREATE TABLE CUSTMAST (

cm_custnum VARCHAR(5),

cm_custzip VARCHAR(10), cm_custstate VARCHAR(3), cm_custrating VARCHAR(2), cm_custname VARCHAR(48), cm_custaddrs VARCHAR(48), cm_custcity VARCHAR(48) );

ISQL> COMMIT WORK CUSTMAST;

2.3.3Manage

This step provides data management functionality for the applica- tion. In this example we will operate on the customer master table by first deleting all records, then adding, updating, and finally dis- playing the contents of the table. Deleting all records will ensure a clean starting point. Adding records will populate the table allowing subsequent record manipulation.

INSERT INTO - This will add a record by inserting it into the table

SELECT - Fetch records according to select criteria

DELETE FROM - Delete records from a table.

COMMIT WORK - Make changes permanent.

In order to run this tutorial you should execute:

@ISQL> @iSQL_Tutorial3.sql

in the first ISQL instance. When the script is finished, start the same tutorial in a second instance of ISQL.

The first execution will finish without committing the update. When the second process is launched, it will encounter a lock on a record it is trying to delete and will block.

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FairCom Corporation

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Contents Isql and Tools Reference Guide For use with c-treeSQL ServerPage Table of Contents Data Load Utility dbload Tutorial Source Code IiiFairCom Corporation Syntax Diagram Conventions Documentation OverviewPurpose of this Manual AudienceRelated Documentation Isql and ToolsIntroduction OverviewIsql and Tools FairCom Corporation Quick Tour Introductory TutorialInit IsqlDefine ManageIsql Create Table Custmast Isql Commit Work CustmastQuick Tour DoneComplete Introductory Tutorial Code Relational Model and Indexing Tutorial ISQLTutorial2.sqlQuick Tour Values Insert IntoValues Insert Into Commit Work QTY PriceComplete 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.sqlTransaction Rollback Work Complete Transaction Processing Tutorial Source Code Isql Statements Starting Interactive SQLSyntax ArgumentsPassword Statement History SupportUsername ConnectstringFormatting Output of Isql Queries Isql StatementsIsql Statements for Statement History Support Statement SummaryIsql Statements for Query Formatting Summary DisplayExample 3-1 Unformatted Query Display from Isql Customername Customercity Orderid OrdervalueFormatting Column Display with the Column Statement Example 3-2 Controlling Display Width of Character ColumnsCustomername 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 SupportIsql Reference 1 @ Execute SyntaxDescription ExampleBreak Syntax BreakspecCustomername ExamplesSkip n Clear Syntax HistoryArgument Column SyntaxOption Break Column Compute Display TitleHeading headingtext ColumnnameFormat formatstring Date-Time Format Strings for the Column Statement Character DescriptionChar Null ? Type Length ColnameNot Null INT Sysdate OrderinfoAmount FLD Column TitleNEW Title ComputeAVG MAX MIN SUM Count VariablenameDefine Syntax ValueColposition DisplayvalueCOL columnnumber @columnnameEdit Syntax Exit Exit or Quit SyntaxRelated Statements 10 GET Syntax Isql GET query.sqlIsql RUN Help Commandsclauses Help SyntaxHistory Syntax Orderstate LotlocationFollowing example illustrates usage of the History statement From HostcommandHost or SH or Syntax List Syntax Quit or Exit Syntax 16 RUN SyntaxQuit Isql HistorySave Syntax 18 SET SyntaxPagesize LinesizePagesize numberlines Connection databasename Default Transaction Isolation Level isolationlevelIsql Break on Isql Select TBL from Systables TBL TBLShow Syntax Is Default ? Spool SyntaxFilename on Database ConnectionsStart Syntax Argument …Isql Spool STK on Isql Spool OFFNull ? Type Length Colname Not Null INT Not Null VarcharDate TablenameType Length Colname Null ? Title Syntax Left Center Right COL nText DoubleIsql Clear Title Isql and Tools FairCom Corporation Data Load Utility dbload IntroductionDbload Command Line Syntax CommandsfilePrerequisites for Dbload OptionsData File Formats Data Load Utility dbloadCommands File Variable Length RecordsFixed Length Records Next RecordDefine Record Statement Char Short Long Float DoubleFor Each Statement NullExample 4-1 Sample dbload commands files ExamplesPosition not specified for fixed length record Compilation ErrorsRecord name redefined Fatal Errors Isql and Tools FairCom Corporation Data Unload Utility dbdump Prerequisites for DbdumpDbdump Command Line Syntax Data Unload Utility dbdump Short Long Float DoubleFor Record Statement Define Record custrec of Fixed Length 37 AS Isql and Tools FairCom Corporation Schema Export Utility dbschema Username.procedurename OutfileUsername.tablename Username.triggernameSchema Export Utility dbschema DbschemaImport Begin ENDIsql and Tools FairCom Corporation Tutorial Source Code Commit Work Select * from Custmast Delete from CustmastVARCHAR6 IntegerMoney Tutorial Source Code Commit Work Delete from CustmastImdesc VARCHAR48 Select * from orderlist Select * from orderitems Isql and Tools FairCom Corporation Symbols Index-iIsql Index-ii FairCom CorporationIndex Index-iii FairCom Corporation