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Explain how a database is modified in SQL. OR Explain database modification.

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By Dipali Umre

1. Delete:

  • Purpose: To remove rows from a table based on specified conditions.
  • Key Points:
    • Deletes entire rows, not just specific attribute values.
    • Works only on a table.
    • Syntax:

2. Insert:

  • Purpose: To add new data into a table.
  • Key Points:
    • Values must match the order of attributes and their specified domains.
  • Syntax:

3. Update:

  • Purpose: To modify existing data in a table.
  • Key Points:
    • Changes the value of a specific column in a tuple.
  • Syntax:
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