בשבוע הבא אני מעביר הרצאה בנושא פיצ'רים חדשים בבסיס הנתונים של אורקל 11 עם דגש על דברים שיכולים לעניין מפתחים של data warehouse. הפוסטים הקרובים יעסקו בנושאים שאני אציג בהרצאה.
עמודות וירטואליות הן עמודות מחושבות שמתנהגות כמו עמודות רגילות. הן אינן תופסות מקום בבסיס הנתונים ולכן ניתן להשתמש בכלי הזה בצורה נרחבת ביותר. מה שקורה בפועל כשמריצים שליפה עם עמודה וירטואלית הוא שהחישוב של תוכן העמודה מתבצע בזמן הריצה. יש לשים לב שמסיבה זו לא ניתן לערוך תוכן של עמודה וירטואלית.
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