IMPORTANT QUERIES

1.This script will spell out numbers to words

select decode( sign( &num ), -1, 'Negative ', 0, 'Zero', NULL ) ||
decode( sign( abs(&num) ), +1, to_char( to_date( abs(&num),'J'),'Jsp') )
from dual
/

2. Select the Nth highest value from a table

select level, max('col_name') from my_table
where level = '&n'
connect by prior ('col_name') > 'col_name')
group by level;

3. Example of a CROSS MATRIX report

SELECT job,
sum(decode(deptno,10,sal)) DEPT10,
sum(decode(deptno,20,sal)) DEPT20,
sum(decode(deptno,30,sal)) DEPT30,
sum(decode(deptno,40,sal)) DEPT40
FROM scott.emp
GROUP BY job
/

5.Select the Nth lowest value from a table

select level, min('col_name') from my_table
where level = '&n'
connect by prior ('col_name') < 'col_name')
group by level;

6. Handy for huge tables that cause rollback segment problems

declare
i number := 0;
cursor s1 is SELECT rowid, t.* FROM tab1 t WHERE col1 = 'value1';
begin
for c1 in s1 loop
update tab1 set col1 = 'value2'
where rowid = c1.rowid;

i := i + 1; -- Commit after every X records
if i > 10000 then
commit;
i := 0;
end if;

end loop;
commit;
end;
/

7.Simple password encryption package to demonstrate how

CREATE OR REPLACE PACKAGE PASSWORD AS
function encrypt(i_password varchar2) return varchar2;
function decrypt(i_password varchar2) return varchar2;
END PASSWORD;
/
show errors


CREATE OR REPLACE PACKAGE BODY PASSWORD AS

-- key must be exactly 8 bytes long
c_encrypt_key varchar2(8) := 'key45678';

function encrypt (i_password varchar2) return varchar2 is
v_encrypted_val varchar2(38);
v_data varchar2(38);
begin
-- Input data must have a length divisible by eight
v_data := RPAD(i_password,(TRUNC(LENGTH(i_password)/8)+1)*8,CHR(0));

DBMS_OBFUSCATION_TOOLKIT.DESENCRYPT(
input_string => v_data,
key_string => c_encrypt_key,
encrypted_string => v_encrypted_val);
return v_encrypted_val;
end encrypt;

function decrypt (i_password varchar2) return varchar2 is
v_decrypted_val varchar2(38);
begin
DBMS_OBFUSCATION_TOOLKIT.DESDECRYPT(
input_string => i_password,
key_string => c_encrypt_key,
decrypted_string => v_decrypted_val);
return v_decrypted_val;
end decrypt;


end PASSWORD;

8. Send e-mail messages from PL/SQL

CREATE OR REPLACE PROCEDURE SEND_MAIL (
msg_from varchar2 := 'oracle',
msg_to varchar2,
msg_subject varchar2 := 'E-Mail message from your database',
msg_text varchar2 := '' )
IS
c utl_tcp.connection;
rc integer;
BEGIN
c := utl_tcp.open_connection('127.0.0.1', 25); -- open the SMTP port 25 on local machine
dbms_output.put_line(utl_tcp.get_line(c, TRUE));
rc := utl_tcp.write_line(c, 'HELO localhost');
dbms_output.put_line(utl_tcp.get_line(c, TRUE));
rc := utl_tcp.write_line(c, 'MAIL FROM: '||msg_from);
dbms_output.put_line(utl_tcp.get_line(c, TRUE));
rc := utl_tcp.write_line(c, 'RCPT TO: '||msg_to);
dbms_output.put_line(utl_tcp.get_line(c, TRUE));
rc := utl_tcp.write_line(c, 'DATA'); -- Start message body
dbms_output.put_line(utl_tcp.get_line(c, TRUE));
rc := utl_tcp.write_line(c, 'Subject: '||msg_subject);
rc := utl_tcp.write_line(c, '');
rc := utl_tcp.write_line(c, msg_text);
rc := utl_tcp.write_line(c, '.'); -- End of message body
dbms_output.put_line(utl_tcp.get_line(c, TRUE));
rc := utl_tcp.write_line(c, 'QUIT');
dbms_output.put_line(utl_tcp.get_line(c, TRUE));
utl_tcp.close_connection(c); -- Close the connection
EXCEPTION
when others then
raise_application_error(
-20000, 'Unable to send e-mail message from pl/sql because of: '||
sqlerrm);
END;
/

8. Send e-mail messages and attachments from PL/SQL

CREATE OR REPLACE PROCEDURE SEND_MAIL (
msg_from varchar2 := 'EMAILADDRESS@DOMAIN.COM', ----- MAIL BOX SENDING THE EMAIL
msg_to varchar2 := 'EMAILADDRESS@DOMAIN.COM', ----- MAIL BOX RECIEVING THE EMAIL
msg_subject varchar2 := 'Output file TEST1', ----- EMAIL SUBJECT
msg_text varchar2 := 'THIS IS THE TEXT OF THE EMAIL MESSAGE.',
v_output1 varchar2 := 'THIS IS THE TEXT OF THE ATTACHMENT FILE. THIS TEXT SHOULD BE IN A TEXT FILE ATTACHED TO THE EMAIL.')
IS
c utl_tcp.connection;
rc integer;
crlf VARCHAR2(2):= CHR(13)||CHR(10);
mesg VARCHAR2( 32767 );
BEGIN
c := utl_tcp.open_connection('196.35.140.18', 25); ----- OPEN SMTP PORT CONNECTION
rc := utl_tcp.write_line(c, 'HELO 196.35.140.18'); ----- PERFORMS HANDSHAKING WITH SMTP SERVER
dbms_output.put_line(utl_tcp.get_line(c, TRUE));
rc := utl_tcp.write_line(c, 'EHLO 196.35.140.18'); ----- PERFORMS HANDSHAKING WITH SMTP SERVER, INCLUDING EXTRA INFORMATION
dbms_output.put_line(utl_tcp.get_line(c, TRUE));
rc := utl_tcp.write_line(c, 'MAIL FROM: '||msg_from); ----- MAIL BOX SENDING THE EMAIL
dbms_output.put_line(utl_tcp.get_line(c, TRUE));
rc := utl_tcp.write_line(c, 'RCPT TO: '||msg_to); ----- MAIL BOX RECIEVING THE EMAIL
dbms_output.put_line(utl_tcp.get_line(c, TRUE));
rc := utl_tcp.write_line(c, 'DATA'); ----- EMAIL MESSAGE BODY START
dbms_output.put_line(utl_tcp.get_line(c, TRUE));
rc := utl_tcp.write_line(c, 'Date: '||TO_CHAR( SYSDATE, 'dd Mon yy hh24:mi:ss' ));
rc := utl_tcp.write_line(c, 'From: '||msg_from||' <'||msg_from||'>');
rc := utl_tcp.write_line(c, 'MIME-Version: 1.0');
rc := utl_tcp.write_line(c, 'To: '||msg_to||' <'||msg_to||'>');
rc := utl_tcp.write_line(c, 'Subject: '||msg_subject);
rc := utl_tcp.write_line(c, 'Content-Type: multipart/mixed;'); ----- INDICATES THAT THE BODY CONSISTS OF MORE THAN ONE PART
rc := utl_tcp.write_line(c, ' boundary="-----SECBOUND"'); ----- SEPERATOR USED TO SEPERATE THE BODY PARTS
rc := utl_tcp.write_line(c, ''); ----- INSERTS A BLANK LINE. PART OF THE MIME FORMAT AND NONE OF THEM SHOULD BE REMOVED.
rc := utl_tcp.write_line(c, '-------SECBOUND');
rc := utl_tcp.write_line(c, 'Content-Type: text/plain'); ----- 1ST BODY PART. EMAIL TEXT MESSAGE
rc := utl_tcp.write_line(c, 'Content-Transfer-Encoding: 7bit');
rc := utl_tcp.write_line(c, '');
rc := utl_tcp.write_line(c, msg_text); ----- TEXT OF EMAIL MESSAGE
rc := utl_tcp.write_line(c, '');
rc := utl_tcp.write_line(c, '-------SECBOUND');
rc := utl_tcp.write_line(c, 'Content-Type: text/plain;'); ----- 2ND BODY PART.
rc := utl_tcp.write_line(c, ' name="Test.txt"');
rc := utl_tcp.write_line(c, 'Content-Transfer_Encoding: 8bit');
rc := utl_tcp.write_line(c, 'Content-Disposition: attachment;'); ----- INDICATES THAT THIS IS AN ATTACHMENT
rc := utl_tcp.write_line(c, ' filename="Test.txt"'); ----- SUGGESTED FILE NAME FOR ATTACHMENT
rc := utl_tcp.write_line(c, '');
rc := utl_tcp.write_line(c, v_output1);
rc := utl_tcp.write_line(c, '-------SECBOUND--');
rc := utl_tcp.write_line(c, '');
rc := utl_tcp.write_line(c, '.'); ----- EMAIL MESSAGE BODY END
dbms_output.put_line(utl_tcp.get_line(c, TRUE));
rc := utl_tcp.write_line(c, 'QUIT'); ----- ENDS EMAIL TRANSACTION
dbms_output.put_line(utl_tcp.get_line(c, TRUE));
utl_tcp.close_connection(c); ----- CLOSE SMTP PORT CONNECTION
EXCEPTION
when others then
raise_application_error(-20000, SQLERRM);
END;
/

9. Access Internet Web pages from SQL or PL/SQL

select utl_http.request('http://www.orafaq.net/') from dual


10. Script to create a new user (with privs) like an existing trem
database user. User data will not be copied.
set pages 0 feed off veri off lines 500

accept oldname prompt "Enter user to model new user to: "
accept newname prompt "Enter new user name: "
-- accept psw prompt "Enter new user's password: "

-- Create user...
select 'create user &&newname identified by values '''||password||''''||
-- select 'create user &&newname identified by &psw'||
' default tablespace '||default_tablespace||
' temporary tablespace '||temporary_tablespace||' profile '||
profile||';'
from sys.dba_users
where username = upper('&&oldname');

-- Grant Roles...
select 'grant '||granted_role||' to &&newname'||
decode(ADMIN_OPTION, 'YES', ' WITH ADMIN OPTION')||';'
from sys.dba_role_privs
where grantee = upper('&&oldname');

-- Grant System Privs...
select 'grant '||privilege||' to &&newname'||
decode(ADMIN_OPTION, 'YES', ' WITH ADMIN OPTION')||';'
from sys.dba_sys_privs
where grantee = upper('&&oldname');

-- Grant Table Privs...
select 'grant '||privilege||' on '||owner||'.'||table_name||' to &&newname;'
from sys.dba_tab_privs
where grantee = upper('&&oldname');

-- Grant Column Privs...
select 'grant '||privilege||' on '||owner||'.'||table_name||
'('||column_name||') to &&newname;'
from sys.dba_col_privs
where grantee = upper('&&oldname');

-- Tablespace Quotas...
select 'alter user '||username||' quota '||
    decode(max_bytes, -1, 'UNLIMITED', max_bytes)||
    ' on '||tablespace_name||';'
from  sys.dba_ts_quotas
where  username = upper('&&oldname');

-- Set Default Role...
set serveroutput on
declare
defroles varchar2(4000);
begin
for c1 in (select * from sys.dba_role_privs
where grantee = upper('&&oldname')
and default_role = 'YES'
) loop
if length(defroles) > 0 then
defroles := defroles||','||c1.granted_role;
else
defroles := defroles||c1.granted_role;
end if;
end loop;
dbms_output.put_line('alter user &&newname default role '||defroles||';');
end;
/

11. Tabular display of redo-log archiving history (logs/hour)

set pagesize 50000
set veri off
set colsep ""

set termout off
def time="time"
col time new_value time
select 'to_char(first_time,''DD/MM/YY HH24:MI:SS'')' time
from dual
where &&_O_RELEASE like '8%' -- Oracle8
/
set termout on

select substr(&&time, 1, 5) day,
to_char(sum(decode(substr(&&time,10,2),'00',1,0)),'99') "00",
to_char(sum(decode(substr(&&time,10,2),'01',1,0)),'99') "01",
to_char(sum(decode(substr(&&time,10,2),'02',1,0)),'99') "02",
to_char(sum(decode(substr(&&time,10,2),'03',1,0)),'99') "03",
to_char(sum(decode(substr(&&time,10,2),'04',1,0)),'99') "04",
to_char(sum(decode(substr(&&time,10,2),'05',1,0)),'99') "05",
to_char(sum(decode(substr(&&time,10,2),'06',1,0)),'99') "06",
to_char(sum(decode(substr(&&time,10,2),'07',1,0)),'99') "07",
to_char(sum(decode(substr(&&time,10,2),'08',1,0)),'99') "08",
to_char(sum(decode(substr(&&time,10,2),'09',1,0)),'99') "09",
to_char(sum(decode(substr(&&time,10,2),'10',1,0)),'99') "10",
to_char(sum(decode(substr(&&time,10,2),'11',1,0)),'99') "11",
to_char(sum(decode(substr(&&time,10,2),'12',1,0)),'99') "12",
to_char(sum(decode(substr(&&time,10,2),'13',1,0)),'99') "13",
to_char(sum(decode(substr(&&time,10,2),'14',1,0)),'99') "14",
to_char(sum(decode(substr(&&time,10,2),'15',1,0)),'99') "15",
to_char(sum(decode(substr(&&time,10,2),'16',1,0)),'99') "16",
to_char(sum(decode(substr(&&time,10,2),'17',1,0)),'99') "17",
to_char(sum(decode(substr(&&time,10,2),'18',1,0)),'99') "18",
to_char(sum(decode(substr(&&time,10,2),'19',1,0)),'99') "19",
to_char(sum(decode(substr(&&time,10,2),'20',1,0)),'99') "20",
to_char(sum(decode(substr(&&time,10,2),'21',1,0)),'99') "21",
to_char(sum(decode(substr(&&time,10,2),'22',1,0)),'99') "22",
to_char(sum(decode(substr(&&time,10,2),'23',1,0)),'99') "23"
from sys.v_$log_history
group by substr(&&time,1,5)
/

set colsep " "


12. Compare indexes on two databases and list the differences


col table_name format a30
col column_name format a30
col column_position format 990

accept DB1 prompt "Enter database name to compare from: "
accept DB2 prompt "Enter database name to compare to: "


13. Tables/ columns with indexes on &DB1 that's not on &DB2

select table_owner||'.'||table_name table_name, column_position, column_name
from dba_ind_columns@&DB1.
where table_owner not in ('SYS', 'SYSTEM')
minus
select table_owner||'.'||table_name table_name, column_position, column_name
from dba_ind_columns@&DB2.
where table_owner not in ('SYS', 'SYSTEM')
/

14. Tables/ columns with indexes on &DB2 that's not on &DB1

select table_owner||'.'||table_name table_name, column_position, column_name
from dba_ind_columns@&DB2.
where table_owner not in ('SYS', 'SYSTEM')
minus
select table_owner||'.'||table_name table_name, column_position, column_name
from dba_ind_columns@&DB1.
where table_owner not in ('SYS', 'SYSTEM')
/

spool off