Oracle of Nashville

To create an external table in Oracle, you need to perform the following steps: Connect to the Oracle database server as a user with the CREATE TABLE privilege. You can do this using SQL*Plus or any other Oracle client. Create a directory object that points to the location of the data file on the file system. You can do this using the following SQL statement: CREATE DIRECTORY my_dir AS '/path/to/data/files'; Grant read permission on the directory object to the user who will be querying the external table. You can do this using the following SQL statement: GRANT READ ON DIRECTORY my_dir TO my_user; Create the external table using the CREATE TABLE statement. The table definition should include the ORGANIZATION EXTERNAL clause and a LOCATION clause that specifies the directory object and file name. CREATE TABLE my_table (    col1 NUMBER,     col2 VARCHAR2(20),     col3 DATE ) ORGANIZATION EXTERNAL (  TYPE ORACLE_LOADER ...

Shell scripting can be an effective tool for monitoring Oracle databases because it allows you to automate tasks and perform checks on a regular basis. Here is a Bourne shell script that you can use to monitor Oracle database sessions and send an email alert to admin@domain.com when the number of sessions is greater than 100: #!/bin/sh # Query to count the number of Oracle database sessions SESSION_COUNT=`sqlplus -S << EOF SELECT COUNT(*) FROM v\\$session WHERE type = 'USER'; EOF` # Check if the number of sessions is greater than 100 if [ $SESSION_COUNT -gt 100 ] then # Send an email alert to admin@domain.com mail -s "Oracle Session Alert" admin@domain.com << EOF The number of Oracle database sessions is currently $SESSION_COUNT, which is greater than the threshold of 100. Please check the database and take necessary action. EOF fi This script uses the sqlplus command to execute a SQL query that counts the number of user sessions in ...

Here is a SQL script that you can use to monitor Oracle database sessions: -- Query to monitor Oracle database sessions SELECT s.sid, s.serial#, s.username, s.status, s.machine, s.program, s.osuser, s.process, s.logon_time FROM v$session s WHERE s.type = 'USER' ORDER BY s.logon_time ASC; This script queries the v$session view, which contains information about all the sessions currently connected to the database. The WHERE clause filters the rows to show only user sessions, and the ORDER BY clause sorts the results by logon time in ascending order. The columns in the v$session view include: sid : the session ID of the session serial# : the serial number of the session username : the username of the user connected to the session status : the status of the session (e.g. ACTIVE, INACTIVE) machine : the name of the machine from which the session is connected program : the name of the program connected to the session osuser : the operating system user associated with the ses...