chapter twenty one producing readable output
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Chapter Twenty One Producing Readable Output. Objectives: Writing reports Page set up Page layout Queries with input. Producing Readable Output. Summary of Formatting Output Commands. COLUMN TTITLE BTITLE BREAK COMPUTE. COLUMN:. COLumnname | expression CLE ar FOR matformat - PowerPoint PPT PresentationTRANSCRIPT
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Chapter 21: Report writing 1
Chapter Twenty One Producing Readable Output
Objectives: Writing reports Page set up Page layout Queries with input
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Producing Readable Output
Your Name January 7,2001
List of courses
Department Course No.
Course Name
Credit Date Started
Max enrollment
COSC 100 Intro 3 2-10-92 30
110 Intro II 3 2-11-98 15
200 Programming
3 14-2-93 20
220 Application 3 10-10-01
20
Total 12
MATH 100 Algebra 4 1-9-91 45
Grand Total
Report1.sql
110
Page 1
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Chapter 21: Report writing 3
Summary of FormattingOutput Commands
COLUMN TTITLE BTITLE BREAK COMPUTE
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Chapter 21: Report writing 4
COLUMN:COLumn name | expression
CLEar FORmat formatHEAding TextJUStify LE | CE | RNEWLineNEW_VALUE
continue
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Chapter 21: Report writing 5
COLUMN:(continued)
NULl textNOPRInt PRInt
WRApped TRUncated
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Formatting Option:COLUMN Name FORMAT A10COLUMN id FORMAT 9999COLUMN cr FORMAT 9COLUMN Gpa FORMAT 9.99
FORMAT:$9999909999909,999.99DATEA10L999
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Chapter 21: Report writing 7
Formatting Option:COLUMN Name FORMAT A10COLUMN id FORMAT 9999COLUMN cr FORMAT 9COLUMN GPA FORMAT 9.99SELECT Name, id, cr, GPAFROM studentWHERE Major=‘COSC’ORDER BY GPA;
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Heading Option:COLUMN Name HEADING ‘Student’’s
Name’COLUMN id HEADING ‘Student’’s ID’COLUMN cr*grade HEADING ‘Score’
COLUMN name HEADING ‘Student’’s Name’ JUSTIFY LE
COLumn Name HEAding ‘Name’ FORmat A10COLumn Major FORmat A7 NULL ‘NO Major’COL address HEADING ‘Addr’ FORMAT A7 TRUNC
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Chapter 21: Report writing 9
Column Example:
COLUMN id HEADING ‘Stud ID’ FORMAT 9999TRUNCATED
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Chapter 21: Report writing 10
Clear Setting
COLumn Major
CLEar COLumn
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Chapter 21: Report writing 11
Break onBREAK ON id SKIP 2BREAK ON id DUPLICATE SKIP 2BREAK ON id NODUPLICATEBREAK ON Major ON ID
BREAK ON REPORT PAGE ON dept PAGE
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Break onFormat:
BREAK ON column BREAK ON row BREAK ON page BREAK ON report
SKIP nSKIP page
CLEAR BREAK
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Chapter 21: Report writing 13
ComputeCOMPUTE SUM OF gpa ON idCOMPUTE SUM LABEL ‘Total’ OF gpa ON idCOMPUTE AVG OF a, b, c, d ON e COMPUTE SUM AVG COUNT OF gpa ON id
AVGCOUNTMAXMINSTDVAR
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Chapter 21: Report writing 14
Check the Setting:
COLUMNBREAKSHOWDEFINE
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Chapter 21: Report writing 15
Page SetupLine size:
SET LINESIZE 75
Page size:SET PAGESIZE 60
Blank lines at the top:SET NEWPAGE 3
Writing into a file:SPOOL filename.lisSPOOL Gstudent.lisSPOOL OFF
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Page SetupDisplay:
SET TERMOUT ONSPOOL filename.lis
SET TERMOUT OFF
Heading separator:SET HEADSEP charSET HEADSEP !
Underlining:SET UNDERLINE OFF
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Page SetupTitle:
TTITLE text | variableTTITLE ‘Information ‘BTITLE ‘Confidential‘
TTITLE Left ‘Page: ’ SQL.PNO – Right ‘Date: ‘ SYSDATE Skip 1 – Center ‘ My Report ‘ Skip 3;
SQL.LNOSQL.PNOSQL.RELEASESQL.SQLCODESQL.USER
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Page Setup
Host:HOST myeditfilename.SQL
HOST list 2
Start:START filename.SQL
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Page SetupSummary:COLUMNCOLUMN colname
TTITLEBTITLE
BREAK
COMPUTE
DEFINE
SHOW HEADSEPSHOW LINESIZESHOW PAGESIZESHOW NEWPAGE
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Set Commands
COLSEP [ |Text]FEEDBACK [OFF| ON| n]HEADING [OFF| ON]LINESIZE [n]PAGESIZE [n]PAUSE [OFF| ON| Text]TERMOUT[OFF| ON]
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Chapter 21: Report writing 21
Report Writing Example:Your Name January 7,2001
List of courses
Department Course No.
Course Name
Credit Date Started
Max enrollment
COSC 100 Intro 3 2-10-92 30
110 Intro II 3 2-11-98 15
200 Programming
3 14-2-93 20
220 Application 3 10-10-01
20
Total 12
MATH 100 Algebra 4 1-9-91 45
Grand Total
Report1.sql
110
Page 1
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Chapter 21: Report writing 22
Report Writing Example:CLEAR BREAKCLEAR COMPUTECOLUMN dept HEADING ‘Department’ FORMAT A12COLUMN c_num HEADING ‘Course|No.’ FORMAT 999COLUMN title HEADING ‘Course|Name’ FORMAT A13COLUMN cr HEADING ‘Credit’ FORMAT 99COLUMN D_start HEADING ‘Date|Started’ FORMAT
DATECOLumn m_enrol HEAding ‘Max|Enrollment’ FORMAT
999
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Report Writing Example:COL SYSDATE NEW_VALUE xdate NOPRINT
FORMAT A1 TRUNCBREAK ON dept SKIP 2COMPUTE SUM OF cr ON dept--COMPUTE SUM OF cr ON dept REPORTTTITLE LEFT ‘Your Name:’SKIP 2 -
RIGHT xdate SKIP 1 -CENTER ‘List of Cources’ SKIP 1
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Report Writing Example:
BTITLE LEFT ‘Report1.sql’ -RIGHT ‘Page No: ’ SQL.PNO
SELECT dept, c_num, title, cr, d_start.m_enroll
FROM departmentWHERE dept IN (‘COSC’, ‘MATH’)ORDER BY dept;
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Login FileLogin.sql
prompt login.sql loadedset feedback offset sqlprompt ‘ ‘set sqlnumber offset numwidth 5set pagesize 24set linesize 79
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Substitution Variables Substitution variables to
temporarily store values- &- & &- DEFINE and ACCEPT
Pass variable values between SQL statements
Dynamically alter headers and footers
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USING & VARIABLE:
SELECT name, id, addressFROM student WHERE id=&student_id;
Enter value for student_id:
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& Substitution Variables User provides the input to the query
SELECT Name, GPA, IDFROM StudentWHERE UPPER(Major) = &Major_Input;
Enter Value for Major_Input: ‘COSC’
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& Substitution VariablesSELECT Name, ID, &Column_nameFROM StudentWHERE &conditionORDER BY ℴ
Enter Value for Column_name:Enter Value for Condition:Enter Value for Order:
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&& Substitution Variables
Use a value of a variable more than one time
SELECT Name, ID, &&Column_nameFROM StudentWHERE
&Column_name=&NewName;
Enter value for Column_name:
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SET VERIFY ON:SQL> SET VERIFY ONSQL> SELECT name, id, address
2 FROM student 3 WHERE id=&student_id;
Enter value for student_id: 1111Old 3: where id=&student_id;New 3: where id= 1111
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Character and Date Values
With Substitution Variables:
SELECT name, id, b_dateFROM student WHERE b_date =
'&new_birthdate';
Enter value for new_birthdate:
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Specifying Column Names, Expressions, and Text at Run Time
WHERE condition ORDER BY clause COLUMN expression TABLE name Entire SELECT statement
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Chapter 21: Report writing 34
ExampleSELECT name, id, rank, &column_nameFROM faculty WHERE &condition ORDER BY &order_column;
Enter value for column_name:Enter value for condition:Enter value for order_column:
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Chapter 21: Report writing 35
Defining User Variables You can pre-define variables using:
DEFINE: Create a user variable of CHAR data type
ACCEPT: Read user input and store it in a variable
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Chapter 21: Report writing 36
Defining User Variables If you need to predefine a variable that
includes spaces, you need to enclose the value within single quotation marks, when using the DEFINE command.
DEFINE variable=CAR DEFINE variable DEFINE ACCEPT
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ACCEPT Command: Create a customized prompt when
accepting user input
Explicitly defines a NUMBER or DATE datatype variable
Hides user input for security
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ACCEPT Command:ACCEPT variable [ datatype] [FORMAT
format][prompt text ] [HIDE]
ACCEPT field PROMPT 'Input your Major:‘SELECT * FROM student WHERE major=UPPER ('&field')
Input your major:
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DEFINE and UNDEFINE Use the UNDEFINE command to
clear Exit SQL*plus
To define variables for every session, modify your login.sql file
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Create a VariableDEFINE dept_name=COSCDEFINE dept_name
SELECT *FROM facultyWHERE dept=UPPER
('&dept_name');
UNDEFINE dept_name