Duplicateli Rows

The default display of queries is all rows, including duplicate rows.

SQL> SELECT deptno 2 FROM emp;

DEPTNO

---------

10

30

10

20

...

14 rows selected.

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Eliminatingli i i Duplicateli Rows

Eliminate duplicate rows by using the DISTINCT keyword in the SELECT clause.

SQL> SELECT DISTINCT deptno 2 FROM emp;

DEPTNO

---------

10

20

30

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SQL and SQL*Plusl InteractionI i

Formatted Report

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SQL Statements Versus

SQL*Plusl Commands

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Overviewie of SQL*Plusl

•• Log inin toto SQL*Plus* l ..

•• Describeri thet tablet le structuretr t re..

•• Editit yourr SQL statementt t t..

•• Executete SQL fromfr SQL*Plus* l ..

•• Save SQL statementst t ts toto filesfil and append SQL statementst t ts toto filesfil ..

•• Executete saved filesfil ..

•• Load commands fromfr filefile toto bufferff r toto editit..

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Loggingi InIn to SQL*Plusl

•From Windows environment:

•From command line:

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Displayingi l i Tablele Structure

Use the SQL*Plus DESCRIBE command to display the structure of a table.

DESC[RIBE] tablename

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Displayingi l i Tablele Structure

SQL> DESCRIBE dept

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SQL*Plusl Editingi i Commands

•• A[PPEND][ ] textt t

•• C[HANGE][ ] // oldld // new

•• C[HANGE][ ] // textt t //

•• CL[EAR][ ] BUFF[ER][ ]

•• DEL

•• DEL n

•• DEL m n

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SQL*Plusl Editingi i Commands

•• I[NPUT]I[ ]

•• I[NPUT]I[ ] textt t

•• L[IST][I ]

•• L[IST][I ] n

•• L[IST][I ] m n

•• R[UN][ ]

•• n

•• n textt t

•• 0 textt t

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