Mega Code Archive
Using systimestamp to do benchmark
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SQL>
SQL>CREATE TABLE project (
2 pro_id NUMBER(4),
3 pro_name VARCHAR2(40),
4 budget NUMBER(9,2),
5 CONSTRAINT project_pk PRIMARY KEY (pro_id)
6 );
Table created.
SQL>
SQL>
SQL>INSERT INTO project(pro_id, pro_name, budget)VALUES (1001, 'A',12345);
1 row created.
SQL>INSERT INTO project(pro_id, pro_name, budget)VALUES (1002, 'ERP',23456);
1 row created.
SQL>INSERT INTO project(pro_id, pro_name, budget)VALUES (1003, 'SQL',34567);
1 row created.
SQL>INSERT INTO project(pro_id, pro_name, budget)VALUES (1004, 'CRM',45678);
1 row created.
SQL>INSERT INTO project(pro_id, pro_name, budget)VALUES (1005, 'VPN',56789);
1 row created.
SQL>
SQL>
SQL>CREATE TABLE server_usage (
2 pro_id NUMBER(4),
3 emp_id NUMBER,
4 time_log_date DATE,
5 hours_logged NUMBER(8,2),
6 dollars_charged NUMBER(8,2),
7 CONSTRAINT server_usage_pk PRIMARY KEY (pro_id, emp_id, time_log_date)
8 );
Table created.
SQL>INSERT INTO server_usage(pro_id, emp_id, time_log_date, hours_logged, dollars_charged)
2 VALUES (1001,101,to_date('4-Apr-2004','dd-mon-yyyy'),1123,222);
1 row created.
SQL>INSERT INTO server_usage(pro_id, emp_id, time_log_date, hours_logged, dollars_charged)
2 VALUES (1002,102,to_date('4-Apr-2005','dd-mon-yyyy'),1124,223);
1 row created.
SQL>INSERT INTO server_usage(pro_id, emp_id, time_log_date, hours_logged, dollars_charged)
2 VALUES (1003,103,to_date('4-Apr-2006','dd-mon-yyyy'),1125,224);
1 row created.
SQL>INSERT INTO server_usage(pro_id, emp_id, time_log_date, hours_logged, dollars_charged)
2 VALUES (1004,104,to_date('4-Apr-2007','dd-mon-yyyy'),1126,225);
1 row created.
SQL>INSERT INTO server_usage(pro_id, emp_id, time_log_date, hours_logged, dollars_charged)
2 VALUES (1005,105,to_date('4-Apr-2008','dd-mon-yyyy'),1127,226);
1 row created.
SQL>INSERT INTO server_usage(pro_id, emp_id, time_log_date, hours_logged, dollars_charged)
2 VALUES (1001,106,to_date('4-Apr-2009','dd-mon-yyyy'),1128,227);
1 row created.
SQL>INSERT INTO server_usage(pro_id, emp_id, time_log_date, hours_logged, dollars_charged)
2 VALUES (1002,107,to_date('4-Apr-2010','dd-mon-yyyy'),1129,228);
1 row created.
SQL>
SQL>CREATE TABLE emp (
2 emp_id NUMBER,
3 ename VARCHAR2(40),
4 hire_date DATE DEFAULT sysdate,
5 end_date DATE,
6 rate NUMBER(5,2),
7 CONSTRAINT emp_pk PRIMARY KEY (emp_id)
8 );
Table created.
SQL>INSERT INTO emp(emp_id, ename, hire_date,end_date, rate)VALUES (101, 'Mary', to_date('15-Nov-1961','dd-mon-yyyy'),null,169);
1 row created.
SQL>INSERT INTO emp(emp_id, ename, hire_date,end_date, rate)VALUES (102, 'Tom', to_date('16-Sep-1964','dd-mon-yyyy'),to_date('5-May-2004','dd-mon-yyyy'),135);
1 row created.
SQL>INSERT INTO emp(emp_id, ename, hire_date,end_date, rate)VALUES (104, 'Peter', to_date('29-Dec-1987','dd-mon-yyyy'),to_date('1-Apr-2004','dd-mon-yyyy'),99);
1 row created.
SQL>INSERT INTO emp(emp_id, ename, hire_date,end_date, rate)VALUES (105, 'Mike', to_date('15-Jun-2004','dd-mon-yyyy'),null,121);
1 row created.
SQL>INSERT INTO emp(emp_id, ename, hire_date,end_date, rate)VALUES (107, 'Less', to_date('2-Jan-2004','dd-mon-yyyy'),null,45);
1 row created.
SQL>INSERT INTO emp(emp_id, ename, hire_date,end_date, rate)VALUES (108, 'Park', to_date('1-Mar-1994','dd-mon-yyyy'),to_date('15-Nov-2004','dd-mon-yyyy'),220);
1 row created.
SQL>INSERT INTO emp(emp_id, ename, hire_date,end_date, rate)VALUES (110, 'Ink', to_date('4-Apr-2004','dd-mon-yyyy'),to_date('30-Sep-2004','dd-mon-yyyy'),84);
1 row created.
SQL>INSERT INTO emp(emp_id, ename, hire_date,end_date, rate)VALUES (111, 'Tike', to_date('23-Aug-1976','dd-mon-yyyy'),null,100);
1 row created.
SQL>INSERT INTO emp(emp_id, ename, hire_date,end_date, rate)VALUES (112, 'Inn', to_date('15-Nov-1961','dd-mon-yyyy'),to_date('4-Apr-2004','dd-mon-yyyy'),70);
1 row created.
SQL>INSERT INTO emp(emp_id, ename, hire_date,end_date, rate)VALUES (113, 'Kate', to_date('3-Mar-2004','dd-mon-yyyy'),to_date('31-Oct-2004','dd-mon-yyyy'),300);
1 row created.
SQL>
SQL>
SQL>--Obtain the starting time
SQL>COLUMN start_time NEW_VALUE start
SQL>SELECT systimestamp(9) start_time FROM dual;
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START_TIME
---------------------------------------------------------------------------
26-OCT-09 11.02.43.953000000 AM -08:00
1 row selected.
SQL>
SQL>--Do some work that you want to measure
SQL>SELECT COUNT(*) FROM emp;
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COUNT(*)
----------
10
1 row selected.
SQL>SELECT COUNT(*) FROM project;
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COUNT(*)
----------
5
1 row selected.
SQL>SELECT COUNT(*) FROM server_usage;
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COUNT(*)
----------
7
1 row selected.
SQL>
SQL>--Grab the ending time
SQL>COLUMN end_time NEW_VALUE end
SQL>SELECT systimestamp(9) end_time FROM dual;
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END_TIME
---------------------------------------------------------------------------
26-OCT-09 11.02.44.313000000 AM -08:00
1 row selected.
SQL>
SQL>--Compute the elapsed time
SQL>COLUMN elapsed_time NEW_VALUE elapsed
SQL>SELECT TO_TIMESTAMP_TZ('&end')
2 - TO_TIMESTAMP_TZ('&start') elapsed_time
3 FROM dual;
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ELAPSED_TIME
---------------------------------------------------------------------------
+000000000 00:00:00.360000000
1 row selected.
SQL>
SQL>--Display the elapsed time
SQL>PROMPT The elapsed time for the SELECTs was: &elapsed
The elapsed time for the SELECTs was: +000000000 00:00:00.360000000
SQL>
SQL>
SQL>drop table emp;
Table dropped.
SQL>drop table project;
Table dropped.
SQL>drop table server_usage;
Table dropped.
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