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WRITING AND AUTOMATING SQL*PLUS SCRIPTS
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Table 11-5. SQL*Plus COMPUTE Functions
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AVG COUNT MAX MIN NUMBER STD SUM VAR
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Description
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The average The number of NOT NULL column values The maximum The minimum The number of rows The standard deviation The sum The variance
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Listing 11-33. Using COMPUTE for Aggregation SQL> set pause off SQL> break on deptno skip page on job SQL> compute sum label total of msal on deptno SQL> compute count number of comm on deptno SQL> / DEPTNO JOB EMPNO ENAME MSAL COMM -------- -------- -------- -------- -------- -------10 ADMIN 7934 MILLER 1300 DIRECTOR 7839 KING 5000 MANAGER 7782 CLARK 2450 ******** ******** -------- -------count 0 number 3 total 8750 DEPTNO JOB EMPNO ENAME MSAL COMM -------- -------- -------- -------- -------- -------20 MANAGER 7566 JONES 2975 TRAINER 7369 SMITH 800 7902 FORD 3000 7788 SCOTT 3000 7876 ADAMS 1100 ******** ******** -------- -------count 0 number 5 total 10875
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WRITING AND AUTOMATING SQL*PLUS SCRIPTS
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DEPTNO JOB EMPNO ENAME MSAL COMM -------- -------- -------- -------- -------- -------30 ADMIN 7900 JONES 800 MANAGER 7698 BLAKE 2850 SALESREP 7499 ALLEN 1600 300 7654 MARTIN 1250 1400 7844 TURNER 1500 0 7521 WARD 1250 500 ******** ******** -------- -------count 4 number 6 total 9250 14 rows selected. SQL> compute COMPUTE sum LABEL 'total' OF msal ON deptno COMPUTE count LABEL 'count' number LABEL 'number' OF comm ON deptno SQL> clear computes SQL> clear breaks SQL> As Listing 11-33 shows, you can issue multiple COMPUTE commands, and you can have multiple COMPUTE definitions active at the same time. The CLEAR COMPUTES command erases all compute definitions, and the CLEAR BREAKS command clears the current break definition. If you are happy with the final report results on screen, you can store all SQL and SQL*Plus commands in a script, and add commands to spool the output to a text file, as described in the next section.
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The Finishing Touch: SPOOL
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If you look at the results in Listing 11-33, you see that this mixture of SQL and SQL*Plus commands produces a rather complete report. Now you can use the SQL*Plus SPOOL command to save the report into a file; for example, to allow for printing. The syntax is as follows: SQL> spool [<file-name>[.<ext>] [CREATE|REPLACE|APPEND] | OFF | OUT] If you specify no arguments, the SPOOL command reports its current status. The default file name extension <ext> is LST or LIS on most platforms. SPOOL OFF stops the spooling. SPOOL OUT stops the spooling and sends the result to your default printer. Suppose you have saved the example of Listing 11-33 in a script, containing all SQL*Plus commands and the SQL query. You can turn this script into a complete report by changing the contents as indicated in Listing 11-34. For readability, the three lines to be added are highlighted. The TRIMSPOOL setting suppresses trailing spaces in the result, and the REPLACE option of the SPOOL command ensures that an existing file (if any) will be overwritten.
WRITING AND AUTOMATING SQL*PLUS SCRIPTS
Listing 11-34. Using the SPOOL Command to Generate SQL*Plus Reports set pause off break on deptno skip page on job compute sum label total of msal on deptno compute count number of comm on deptno >>> set trimspool on >>> spool report.txt replace -- The query select deptno, job, empno, ename, msal, comm from employees order by deptno, job; >>> spool off -- Cleanup section undefine dept clear computes clear breaks set pause on
<<< added line <<< added line
<<< added line
If you execute this script, it generates a text file named report.txt in the current folder/directory.
11.5 HTML in SQL*Plus
SQL*Plus supports the ability to generate reports in HTML format, allowing you to display the report results in a browser environment. SQL Developer has more features than SQL*Plus in this area, because it runs in a browser environment itself. Let s look at SQL*Plus first.
HTML in SQL*Plus
The SQL*Plus MARKUP setting is very important if you want to work with HTML. Listing 11-35 shows why this is so. Listing 11-35. The SQL*Plus MARKUP Setting SQL> show markup markup HTML OFF HEAD "<style type='text/css'> body {font:10pt Arial,Helvetica,sans-serif; color:black; background:White;} p {font:1F SQL> set markup SP2-0281: markup missing set option Usage: SET MARKUP HTML [ON|OFF] [HEAD text] [BODY text] [TABLE text] [ENTMAP {ON|OFF}] [SPOOL {ON|OFF}] [PRE[FORMAT] {ON|OFF}] SQL>
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