Chapter 9 : SQL*PLUS REPORTS
Bordoloi and Bock
A SQL*Plus PROGRAM COMMAND File
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Interactive commands can be used to specify report
headings, report footers, report titles, page
numbers, and other common report features that
managers tend to request.
Unfortunately, if you exit SQL*Plus, all of the
information about a report's features is lost unless
you save your commands in a file.
For this reason, we will also focus on creating files
that will store SQL*Plus commands. We'll refer to
this type of file as a SQL*Plus program command
file, or simply a SQL program. The filename
extension used for these files is .sql.
Bordoloi and Bock
Example
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Following program gives a sample SQL*Plus
program command file.
This SQL program will produce the report shown in
Figures 9.1a and 9.1b. All of the data for the report
is selected from the assignment table of the
Company database.
The SQL program has numerous commands.
Bordoloi and Bock
Example
REM Program: ch9-1.sql
REM Programmer: dbock; 3-20-2003
REM Description: A program to list employee work
history
REM on projects.
TTITLE 'Project Information'
BTITLE SKIP 1 CENTER 'Not for external dissemination.'
REPHEADER 'Project Report #1 –- prepared by D. Bock'
SKIP 2
REPFOOTER SKIP 3 '-- Last Page of Report --'
SET LINESIZE 55
SET PAGESIZE 24
SET NEWPAGE 1
Bordoloi and Bock
Example Cont’d
COLUMN "Emp. Soc. Sec. #" FORMAT A16
COLUMN "Hours Worked" FORMAT 999.99
SELECT work_emp_ssn "Emp. Soc. Sec. #",
work_pro_number "Project #", work_hours "Hours
Worked"
FROM assignment
ORDER BY work_emp_ssn, work_pro_number;
•
The report produced is shown next.
Bordoloi and Bock
Sun Apr 14
page
Project Information
Project Report #1 - prepared by D. Bock
Emp. Soc. Sec. # Project # Hours Worked
---------------- ---------- -----------999111111
1
31.40
999111111
2
8.50
999222222
10
34.50
999222222
30
5.10
999333333
3
42.10
999444444
1
999444444
2
12.20
999444444
3
10.50
999444444
10
10.10
999444444
20
11.80
999555555
20
14.80
999555555
30
19.20
999666666
20
999887777
10
10.20
Not for external dissemination.
Bordoloi and Bock
1
Sun Apr 14
page
Project Information
Emp. Soc. Sec. # Project # Hours Worked
---------------- ---------- -----------999887777
30
30.80
999888888
1
21.00
999888888
2
22.00
-- Last Page of Report --
Not for external dissemination.
Bordoloi and Bock
2
Remarks
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Optional remarks are typically entered at the
beginning of a command file program that identify
the filename, programmer name, and date of
program creation.
A brief description of the program is also provided.
You may also list modifications made by
programmer name, date and description here.
Remarks and blank lines are used throughout a
program to enhance the understandability and
readability of programming code.
Bordoloi and Bock
Top and Bottom Titles
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1.
2.
3.
4.
Titles and footers on reports enhance the meaning
of reports for managerial system users.
Reports are rarely disseminated to managers
without appropriate title and footers.
SQL*Plus supports the programming of four types
of titles and footers:
Top title,
Bottom title,
Report header and
Report footer.
Bordoloi and Bock
Top and Bottom Titles
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The TTITLE command (short for top title) prints a
title on each page of a report.
When a simple TTITLE command like the one
shown below is used, the report will automatically
display the report date and page number.
TTITLE 'Project Information'
Bordoloi and Bock
Top and Bottom Titles
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You can also issue the TTITLE command
interactively at the SQL> prompt.
The first TTITLE command shown below will turn
the report title off.
The second one will change the report title
interactively when followed by a slash (/)
command.
TTITLE OFF
TTITLE 'Project and Employee
Information'
/
Bordoloi and Bock
Top and Bottom Titles
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The BTITLE command prints a bottom title with
the specified information at the bottom of each
page of a report.
For example, your organization may want each
page of a report marked as not for external
dissemination as is shown in the BTITLE command
here.
BTITLE SKIP 1 CENTER 'Not for external
dissemination.'
Bordoloi and Bock
Top and Bottom Titles
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The SKIP clause is optional.
SKIP 1 will insert one blank line into the report.
You can specify the number of lines to skip. If the
SKIP option is specified prior to the bottom title, as
is done above, then one line is skipped prior to
printing the bottom title.
The CENTER option centers the bottom title
output.
Bordoloi and Bock
Top and Bottom Titles
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In addition to CENTER, you can also use the
keywords RIGHT and LEFT within both the
TTITLE and BTITLE commands to control the
display of report information.
An example multi-lined TTITLE command is
shown below.
TTITLE LEFT date_var –
RIGHT 'Page: ' FORMAT 99 sql.pno SKIP 1 CENTER 'Project and Employee Information'
Bordoloi and Bock
Top and Bottom Titles
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A dash ( - ) at the end of a line continues the
TTITLE command.
The date_var entry is a variable name that stores
the date.
When a complex TTITLE command is used, Oracle
does not automatically print the date and page
number information as was done earlier .
Bordoloi and Bock
Report Headers and Footers
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A report header can be used to add meaningful
information to the top of the first page of a report.
You should use the REPHEADER command
whenever you want information to be displayed on
only the first page.
The REPHEADER command shown below uses
the SKIP 2 option to insert two blank lines
immediately after the report header is printed.
You'll also notice that the report header prints after
the top title line.
REPHEADER 'Project Report #1 -- prepared by
D. Bock' SKIP 2
Bordoloi and Bock
Report Headers and Footers
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Report footers add meaningful information to the
bottom of the last page of a report.
In the command shown here, the SKIP 3 option
provides for three skipped blank lines prior to
printing the report footer.
You will also note that the report footer prints prior
to the bottom title line.
REPFOOTER SKIP 3 '-- Last Page of Report --'
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The OFF option also applies to report headers and
footers, and will turn the report header and/or footer
off.
Bordoloi and Bock
Setting the Line and Page Size
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The SET LINESIZE command specifies the size of
an output line in characters.
The example report shown before has a line size of
55 characters.
SET LINESIZE 55
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Similarly, the SET PAGESIZE command specifies
the number of lines to be printed per page.
A typical setting is 50 to 55 lines of output per page
for 10-point or 12-point printer fonts.
The command shown below sets the page size to 50
lines.
SET PAGESIZE 50
Bordoloi and Bock
Setting the Line and Page Size
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The SET NEWPAGE command specifies the
number of blank lines to print before the top title
line of a report, that is, the line that displays the
report date and page number.
This is useful for aligning reports produced by
various types of printers.
The SET NEWPAGE command does not affect the
PAGESIZE value.
The command shown below specifies 6 blank lines
at the top of each page. If the page size is set to 55,
this will leave 49 lines for displaying output.
SET NEWPAGE 6
Bordoloi and Bock
Output to the Computer Monitor Screen
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When you are testing a SQL program that will be
produce a printed report, it is sometimes useful to
specify values for the LINESIZE, PAGESIZE, and
NEWPAGE values so that report output will fit on a
computer monitor screen.
Typical values for screen output are shown below.
SET LINESIZE 79
SET PAGESIZE 24
SET NEWPAGE 0
Bordoloi and Bock
Output to the Computer Monitor Screen
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You will probably want the computer monitor
screen output to pause between pages so that you
can review the report.
This can be accomplished by the SET PAUSE
commands shown below.
SET PAUSE 'More . . .'
SET PAUSE ON
SET PAUSE OFF
Bordoloi and Bock
CONTROL BREAK REPORTS
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A control break report organizes information into
meaningful groups.
We will organize the new report into groups
according to each employee's social security
number. The modified example program is listed
below.
The additional lines of code required to produce the
control break report are highlighted in bold text.
Additionally, the decision was made to remove the
report header and report footer.
Bordoloi and Bock
Example Modified
REM Program: ch9-2.sql
REM Programmer: dbock; 3-20-2003
REM Description: A sample program control break
report.
TTITLE 'Project Information'
BTITLE SKIP 1 CENTER 'Not for external dissemination.'
SET LINESIZE 55
SET PAGESIZE 24
SET NEWPAGE 1
COLUMN "Emp. Soc. Sec. #" FORMAT A16
COLUMN "Hours Worked" FORMAT 999.99
Bordoloi and Bock
Example Cont’d
CLEAR BREAKS
BREAK ON "Emp. Soc. Sec. #" SKIP 2 ON REPORT
COMPUTE SUM OF "Hours Worked" ON "Emp. Soc. Sec. #“
COMPUTE SUM OF "Hours Worked" ON REPORT SPOOL report92.lst
SELECT work_emp_ssn "Emp. Soc. Sec. #",
work_pro_number "Project #", work_hours "Hours
Worked"
FROM assignment
ORDER BY work_emp_ssn, work_pro_number;
SPOOL OFF
Bordoloi and Bock
Sun Apr 14
page
Project Information
Project Report #1 - prepared by D. Bock
Emp. Soc. Sec. # Project # Hours Worked
---------------- ---------- -----------999111111
1
31.40
2
8.50
****************
-----------sum
39.90
999222222
10
30
34.50
5.10
-----------39.60
3
42.10
------------
****************
sum
999333333
****************
Bordoloi and Bock
Not for external dissemination.
1
The BREAK Command
• The BREAK command groups data rows for a control
break report. The syntax of the BREAK command is:
BREAK ON (expression1, ON expression2, … \row\page\report) …
[SKIP n | [SKIP] PAGE]
[NODUPLICATES | DUPLICATES];
• The BREAK command can be used to break on an
expression, row, page, report, or more than one of
these at a time. The BREAK command used in
example program is shown below.
CLEAR BREAKS
BREAK ON "Emp. Soc. Sec. #" SKIP 2 ON REPORT
• The CLEAR BREAKS command clears any
previously established breaks.
Bordoloi and Bock
Output Style
• The style of output shown in the example report is called
NONDUPLICATES, or NODUP because each group
value (employee social security number) is shown only
once.
• This is the default BREAK output method so there is no
need to specify it. While this form of output diverges
from the relational, two-dimensional, matrix format, it is
much easier for managers to read.
• The NODUP default can be overwritten by specifying
the keyword DUP with the BREAK command as is
shown here. This will yield the purely relational, twodimensional, matrix format for output.
Bordoloi and Bock
BREAK
ON "Emp. Soc. Sec. #" DUP SKIP 2
SKIP and PAGE Keywords
• To enhance the readability of a report, one or more
blank rows can be inserted after each social
security number grouping. As we noted earlier, the
SKIP keyword inserts the blank rows. Our program
specified to skip two lines prior to beginning the
next report group.
• Replacing the keyword SKIP with PAGE will
cause a page eject to occur after each grouping.
• This will produce a report with each social security
number beginning on a new page. This will also
cause each group to be preceded by new column
headings.
Bordoloi and Bock
The COMPUTE Command
• In order for a COMPUTE command to compute
subtotals and totals properly it must be used in
conjunction with a BREAK command.
• If you have not specified a BREAK command,
then a COMPUTE command will not produce any
results!
• When used with BREAK, a COMPUTE command
displays values that are computed for the BREAK
expression. The syntax of the COMPUTE
command is shown here.
COMPUTE {group function} OF {column_name |
column_name_alias,. . .} ON {break_column_name | ROW | PAGE |
REPORT};
Bordoloi and Bock
The SPOOL Command
• The SPOOL command routes the output from a
SQL*Plus program to the specified filename.
• The SPOOL command shown below routes output
to a file named report9-2.lst.
• The "lst" filename extension is short for listing;
however, you can specify any filename extension
that you desire.
• The SPOOL OFF command terminates writing to
the output file.
SPOOL report9-2.lst
SPOOL OFF
Bordoloi and Bock
Additional BREAK Command Details
• The BREAK command in the example program specifies a
break on a column as well as on a report. You can also break
on any kind of expression, on rows, and on pages.
• The BREAK ON ROW command can be used to change report
spacing. The BREAK command shown below will insert a
blank line between each row of the assignment report.
BREAK ON ROW SKIP 1
• A column break and a row break can be used together. In
conjunction, these two breaks create a double-spaced report
that is still separated by column values. The command shown
here will produce a double-spaced report that also breaks at the
end of the report.
BREAK ON "Emp. Soc. Sec. #" SKIP 1 ON REPORT ON ROW SKIP 1
Bordoloi and Bock
Viewing Current BREAK and COMPUTE
Command Settings
• Only one BREAK command can be active at a time.
• You can interactively replace the current BREAK
command by typing a new command at the SQL> prompt.
• If you forget which BREAK command is active, simply
type the command BREAK on a line by itself and
SQL*Plus will display the break status.
• Note that the default for the BREAK command is no
duplicates (NODUP).
BREAK
break on report nodup
on Emp. Soc. Sec. # skip 2 nodup
Bordoloi and Bock
Viewing Current BREAK and COMPUTE
Command Settings
• Unlike BREAK, the COMPUTE command is cumulative.
• While you are testing a program, you may accumulate quite a
number of COMPUTE settings. You can display the current
settings by simply typing the COMPUTE command at the SQL>
prompt.
COMPUTE
COMPUTE sum LABEL 'sum' OF Hours Worked ON Emp. Soc. Sec. #
COMPUTE sum LABEL 'sum' OF Hours Worked ON REPORT
• You can clear COMPUTE settings by typing CLEAR COMPUTE
at the SQL> prompt or by placing the command within a
program.
• When the command is used interactively, Oracle will respond as
shown below.
CLEAR COMPUTE
computes cleared
Bordoloi and Bock
CREATING MASTER-DETAIL
REPORTS
• A master-detail report is a form of control break report
because the report presents information that is "grouped.“
• The report typically displays data rows from more than one
table.
• Consider the one-to-many relationship between the
department and project tables for the Company as
described in Appendix A.
• Each department controls numerous projects, and a project
belongs to a single department.
• In this situation, the rows in the department table are
"master" rows because the department table is on the "one"
side of the one-to-many relationship.
• The associated project table rows provide the "detail"
information.
Bordoloi and Bock
• Example
• Program ch9-3.sql will produce the master-detail report for the
department-project relationship.
REM Program: ch9-3.sql
REM Programmer: dbock; Date: 3-20-2003
REM Description: A sample Master-Detail report
REM set page size, line size, new page spacing for screen display.
SET LINESIZE 65
SET PAGESIZE 12
SET NEWPAGE 1
REM define department variable
COLUMN pro_dept_number NEW_VALUE dept_number_var NOPRINT
REM set column sizes based on alias column names
COLUMN dpt_name FORMAT A18
COLUMN pro_name FORMAT A15
COLUMN pro_location FORMAT A15
TTITLE CENTER 'Department Number:' dept_number_var SKIP 2
BTITLE SKIP 1 CENTER 'Not for external dissemination.'
Bordoloi and Bock
• Example cont’d
BREAK ON pro_dept_number SKIP PAGE
SELECT pro_dept_number, dpt_name, pro_name, pro_location
FROM department d, project p
WHERE d.dpt_no = p.pro_dept_number AND
pro_dept_number IN (3, 7)
ORDER BY pro_dept_number;
• The report produced is shown next.
Bordoloi and Bock
Department Number:
DPT_NAME
-----------------Admin and Records
Admin and Records
PRO_NAME
----------------Inventory
Pay Benefits
3
PRO_LOCATION
--------------Marina
Marina
Not for external dissemination.
More . . .
Department Number:
DPT_NAME
-----------------Production
Production
Production
PRO_NAME
--------------Order Entry
Payroll
Receivables
PRO_LOCATION
--------------St. Louis
Collinsville
Edwardsville
Not for external dissemination.
Bordoloi and Bock
7
MASTER-DETAIL REPORTS
• A typical master-detail report format includes information in the
top title report line that identifies the "master column" that
controls the page breaks.
• You can reference a column value in a top title by first storing
the column value to a program variable.
• You then specify the program variable name in the TTITLE
command.
• A special form of the COLUMN command is used to define a
program variable as shown below.
• The actual COLUMN command from program ch9-3.sql is also
shown below.
• The NEW_VALUE clause defines the variable name. You must
follow Oracle's naming rules when naming program variables.
COLUMN column_name NEW_VALUE variable_name
[options]
COLUMN pro_dept_number NEW_VALUE dept_number_var
NOPRINT
Bordoloi and Bock
Using Views in Master-Detail Reports
REM Program: ch9-4.sql
REM Programmer: dbock; 3-20-2003
REM Description: The revised Master-Detail program with a
View.
REM
SET
SET
SET
set page size, line size, new page for screen display.
LINESIZE 75;
PAGESIZE 12;
NEWPAGE 1;
REM Create a view to be used in the SELECT command later.
CREATE OR REPLACE VIEW project_department (project_no,
dept_name,
project_name, location) AS
SELECT pro_dept_number, dpt_name, pro_name, pro_location
FROM department d, project p
WHERE d.dpt_no = p.pro_dept_number AND
pro_dept_number IN (3, 7)
ORDER BY pro_dept_number;
Bordoloi and Bock
Using Views in Master-Detail Reports
COLUMN dept_name NEW_VALUE dpt_name_var NOPRINT
COLUMN dept_name FORMAT A18
COLUMN project_name FORMAT A15
COLUMN location FORMAT A15
TTITLE CENTER 'Department Name: ' dpt_name_var SKIP 2
BTITLE SKIP 1 CENTER 'Not for external dissemination.'
BREAK ON project_no SKIP PAGE;
SELECT project_no, dept_name, project_name, location
FROM project_department;
•
The program creates a view named project-department. This
view assigns meaningful names to the selected columns, joins
the department and project tables, and orders the output of
rows by department number of the department controlling
Bordoloi and Bock
each project.
Using Views in Master-Detail Reports
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The revised COLUMN command uses a NEW_VALUE
clause to store the value of the dept_name column of
the view to a variable named dpt_name_var.
This variable is used in the TTITLE command to
display the department name at the top of each page.
The BREAK command still breaks on the project_no
column as the master column.
Finally, the SELECT statement is greatly simplified
because the program is now selecting information from
the view.
If the view had been previously created, then the code
to create the view could be deleted from program
ch9-4.sql.
Bordoloi and Bock
Department Name: Admin and Records
PROJECT_NO PROJECT_NAME
---------- --------------3 Inventory
Pay Benefits
LOCATION
--------------Marina
Marina
Not for external dissemination.
More . . .
Department Name: Production
PROJECT_NO PROJECT_NAME
---------- --------------7 Order Entry
Payroll
Receivables
Bordoloi and Bock
LOCATION
--------------St. Louis
Collinsville
Edwardsville
Not for external dissemination.
USING VARIABLES FOR INTERACTIVE
REPORTING
REM Program: ch9-5.sql
REM Programmer: dbock; 3-20-2003
REM Description: Program with interactive variables.
SET LINESIZE 60;
SET PAGESIZE 12;
SET NEWPAGE 1;
COLUMN today NEW_VALUE date_var
SELECT TO_CHAR(SYSDATE, 'MM/DD/YY') today
FROM dual;
COLUMN pro_name NEW_VALUE pro_name_var NOPRINT
COLUMN pro_number NEW_VALUE pro_number_var NOPRINT
COLUMN "Department" FORMAT A18
Bordoloi and Bock
USING VARIABLES FOR INTERACTIVE
REPORTING
COLUMN "SSN" FORMAT A12
COLUMN "Employee Name" FORMAT A20
COLUMN "Hours" FORMAT 999.99
CLEAR BREAKS
CLEAR COMPUTES
BREAK ON "Department" ON REPORT
COMPUTE SUM OF "Hours" ON REPORT
ACCEPT project_no_var PROMPT 'Enter a project number: '
PAUSE Press the Enter Key to continue.
TTITLE LEFT date_var CENTER 'Project Name: ' pro_name_var RIGHT 'Page:' FORMAT 999 sql.pno SKIP 1 CENTER 'Project Number:' pro_number_var SKIP 2
Bordoloi and Bock
USING VARIABLES FOR INTERACTIVE
REPORTING
SPOOL project.lst
SELECT pro_number, pro_name, dpt_name "Department",
SUBSTR(work_emp_ssn,1,3)||'-'||SUBSTR(work_emp_ssn,4,2)||''||SUBSTR(work_emp_ssn,6,4) "SSN",
emp_last_name||', '||
emp_first_name "Employee Name",
work_hours "Hours"
FROM project p, assignment a, employee e, department d
WHERE p.pro_number = a.work_pro_number AND
a.work_emp_ssn = e.emp_ssn AND
d.dpt_no = p.pro_dept_number AND
p.pro_number = '&project_no_var‘
ORDER BY pro_number, emp_last_name, emp_first_name;
SPOOL OFF
Bordoloi and Bock
Executing Program Ch9-5.Sql
SQL> start ch9-5.sql
More . . .
TODAY
-------04/14/02
Enter a project number: 30
Press the Enter Key to continue.
old
9:
new
9:
More . . .
p.pro_number = '&project_no_var'
p.pro_number = '30'
04/14/02
Project Name: Pay Benefits
Project Number: 30
Department
SSN
------------------ -----------Admin and Records 999-22-2222
999-55-5555
999-88-7777
******************
Bordoloi and Bock
Page:
1
Employee Name
Hours
-------------------- ------Amin, Hyder
5.10
Joyner, Suzanne
19.20
Markis, Marcia
30.80
------55.10
Defining User Variables
• You can define variables with the SQL*Plus
DEFINE command.
• The command shown here defines a variable
name_var, and assigns it the value "Bordoloi."
DEFINE name_var = Bordoloi
• If you need to know what variables have been
defined for your working session, enter the DEFINE
command by itself at the SQL> prompt and all
current variable definitions will be displayed.
• You can also delete a variable with the UNDEFINE
<variable_name> command.
Bordoloi and Bock
Defining User Variables
DEFINE name_var = Bordoloi
SELECT emp_last_name, emp_first_name,
emp_date_of_birth
FROM employee
WHERE emp_last_name = '&name_var'
/
EMP_LAST_NAME EMP_FIRST_NAME EMP_DATE_
------------------------- -------------------------- ----------------Bordoloi
Bijoy
10-NOV-67
Bordoloi and Bock
Passing Parameter Values Through the
START Command
• You can pass a value to a program at run time as a
parameter of the START command.
• Use an ampersand (&) followed by a numeral in the
command file; for example, &1 in place of the
substitution variable.
• Each time you run the command file, the START
command replaces the &1 parameter in the file with
the first value (called an argument) listed after a
START filename command.
• You can use as many ampersand-parameter
variables as is needed in the program.
• The arguments of the START command are
separated by commas.
Bordoloi and Bock
Example
REM ch9-6.sql – Example passing arguments
SELECT emp_last_name, emp_ssn, emp_dpt_number
FROM employee
WHERE emp_last_name = '&1' OR emp_dpt_number = '&2';
REM end of program
SQL> start ch9-6.sql Bock 1
old
3: WHERE emp_last_name = '&1' OR emp_dpt_number = '&2'
new
3: WHERE emp_last_name = 'Bock' OR emp_dpt_number = '1'
More . . .
EMP_LAST_NAME
------------------------Bordoloi
Bock
Bordoloi and Bock
EMP_SSN
EMP_DPT_NUMBER
--------- -------------999666666
1
999111111
7
Clearing the Computer Monitor Screen
•
If you need to clear the computer monitor
screen before displaying a report (or at any
other time), include the CLEAR command
with its SCREEN clause at the appropriate
point in your command file, using the format
shown here.
CLEAR SCREEN
Bordoloi and Bock
Formatting Aggregate Function Titles
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The COMPUTE command produces a standard title of
'sum' as a label for the column that is aggregated.
This also applies to the other aggregate functions; each
function has its own standard title.
SQL*Plus allows you to change the aggregate function
title to a more meaningful title.
The COMPUTE commands shown below revise those
used earlier in program ch9-2.sql (run program ch92a.sql).
Each employee's sum of total hours worked is labeled
as 'Employee Hours,' and the report sum of total hours
is labeled as 'Total Hours.'
Bordoloi and Bock
COMPUTE SUM LABEL 'Employee Hours' OF
"Hours Worked" ON "Emp. Soc. Sec. #"
COMPUTE SUM LABEL 'Total Hours' OF "Hours Worked" ON
REPORT
Following Figure gives pages #1 and #4 of the report
Bordoloi and Bock
Sun Apr 14
page
Project Information
Emp. Soc. Sec. # Project # Hours Worked
---------------- ---------- -----------999111111
1
31.40
2
8.50
****************
-----------Employee Hours
39.90
999222222
10
30
34.50
5.10
-----------39.60
3
42.10
-----------42.10
****************
Employee Hours
999333333
****************
Employee Hours
Not for external dissemination.
Bordoloi and Bock
1
--------- pages 2 and 3 would be printed here --------Sun Apr 14
page
Project Information
Emp. Soc. Sec. # Project # Hours Worked
---------------- ---------- ----------------------284.20
Total Hours
Not for external dissemination.
Bordoloi and Bock
4
Changing Column Headings
• When displaying column headings, you can either use the
default heading which is the column name, or you can
change the heading with the COLUMN command.
• The COLUMN command's HEADING clause can be used
to assign meaningful column headings.
• If the new heading is a single word, the heading can be
typed as is done for the emp_ssn column heading of SSN.
• If the heading is more than one word, the heading must be
enclosed in single or double-quotes as is shown for the
emp_last_name heading of "Last Name."
• If you want to display a column heading on more than one
line, use a vertical bar (|) where you want to begin a new
line
as is done for the emp_first_name column.
Bordoloi and Bock
Example
COLUMN emp_ssn HEADING SSN;
COLUMN emp_last_name HEADING "Last Name";
COLUMN emp_first_name HEADING "First|Name";
•
The new headings will remain in effect until you enter
different headings, reset each column's format, or exit
SQL*Plus.
Bordoloi and Bock