Dave Costa questions

Dave Costa answers

• psutil.Process and lsof command discrepancy
• Does Oracle (RDB in general?) take a snapshot of the table affected by DML?
• Is my lecturers definition of the Liskov Substitution Principle incorrect, or am I misunderstanding?
• What's happening to values in list?
• Extracting BLOB files from Oracle table with UTL_FILE en masse, some compressed some not
• How to add cascade delete in oracle when the foreign key is on the same table
• SQLPLUS output to shell script not returning value
• Is there any reason to FK a PK column to itself
• How does the PL/SQL context work?
• How to rotate table in Oracle?