Unix commands to get the count of files

 ls -l *.rdf | wc -l

SQL Query to find spaces in a data column

select *from (select 'testname@email.com ,noname@gmail.com  ' email from dual) where regexp_like(email,'(^ | $)')

How to search for a text from files in a directory on Linux

 find -type f -name "*.xml" -exec grep -l 'searchtext' {} +

Use the above command to find all files (in this case xnl) containing specific text 'searchtext' on Linux

How to test read/write permissions on UTL directory (in UNIX) from database or backend

Below is the sample script which can be run from TOAD/SQL*PLUS to test the read write permissions on UTL directory from database or backend

DECLARE
  l_file utl_file.file_type;
BEGIN
  l_file := utl_file.fopen( 'DBA_UTL_DIR_NAME', 'test_file_name.txt', 'W' );
  utl_file.put_line( l_file, 'Here is sample text' );
  utl_file.fclose( l_file );
END;

Direcory name (DBA_UTL_DIR_NAME) should exists in DBA_DIRECTORIES table  
Make sure that the UTL_FILE directory path exists in UNIX

select * from DBA_DIRECTORIES where directory_name = 'DBA_UTL_DIR_NAME'

About this Page Personalization Profile Option Values

Set the values of following profiles to enable Personalization Page link in OAF Pages

• FND: Personalization Region Link Enabled    Yes
• Personalize Self-Service Defn                    Yes
• Disable Self-Service Personal                    No

Set FORMS_PATH in Oracle R12

When you face below errors while compiling the custom form:
identifier 'APP_WINDOW.CLOSE_FIRST_WINDOW' must be declared
Bad bind variable parameter.G_query_find

Run the below command to set the FORMS_PATH:
export FORMS_PATH=$AU_TOP/resource:$AU_TOP/forms/US:$AU_TOP/resource/US

Compile the form using the below command:
frmcmp_batch userid=apps/pwd module=$XX_TOP/forms/US/XXFORMfmb output_file=$XX_TOP/forms/US/XXFORM.fmx module_type=form batch=no compile_all=special

Employee Supervisor Hierarchy Query Oracle R12

SELECT   e.*
      FROM (SELECT DISTINCT
      papf.employee_number,
                            papf.full_name "EMPLOYEE_FULL_NAME",
                            papf1.employee_number "SUPERVISOR_EMP_NUMBER",
                            papf1.full_name "SUPERVISOR_FULL_NAME",
       papf.person_id,
                            paaf.supervisor_id
                       FROM apps.per_all_people_f papf,
                            apps.per_all_assignments_f paaf,
                            apps.per_all_people_f papf1,
                            apps.per_person_types ppt
                      WHERE papf.person_id = paaf.person_id
                        AND papf1.person_id = paaf.supervisor_id
                        AND papf.business_group_id = paaf.business_group_id
                        AND TRUNC (SYSDATE) BETWEEN papf.effective_start_date
                                                AND papf.effective_end_date
                            AND TRUNC (SYSDATE) BETWEEN papf1.effective_start_date
                                                AND papf1.effective_end_date                     
                        AND TRUNC (SYSDATE) BETWEEN paaf.effective_start_date
                                                AND paaf.effective_end_date
                        AND ppt.person_type_id = papf.person_type_id
                        AND ppt.user_person_type <> 'Ex-employee') e
CONNECT BY PRIOR person_id = supervisor_id
START WITH person_id = :Person_id ; -- List the person id to know who all report under him like Manager id or person id of VP