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What is different purpose of drop and delete table

DROP TABLE

  1. Purpose: Permanently removes the entire table from the database, including its structure (columns, data types, constraints, indexes, etc.).
  2. Impact:Irreversible: Once dropped, the table and all its data are gone.
  3. Cannot be rolled back (in most cases).
  4. Syntax: SQL

DROP TABLE table_name;

DELETE FROM

  1. Purpose: Removes specific rows or all rows from a table while preserving the table's structure (columns, data types, constraints, indexes).
  2. Impact:Reversible: Changes made with DELETE can usually be rolled back using transactions.
  3. Syntax: SQL

DELETE FROM table_name
[WHERE condition];
  1. WHERE clause is optional. If omitted, all rows in the table are deleted.

Here's a table summarizing the key differences:

Feature DROP TABLE DELETE FROM
ActionRemoves the entire table and its structureRemoves specific rows or all rows from a table
ReversibilityGenerally irreversibleUsually reversible (using transactions)
SpeedUsually faster than DELETECan be slower for large tables (especially without WHERE clause)
Data RecoveryNot possible (unless backed up)Possible through rollback or backups

In summary:

  1. DROP TABLE is used when you want to completely remove a table from the database.6
  2. DELETE FROM is used when you want to remove specific rows from a table while keeping its structure intact.7

Choose the appropriate command based on your specific needs and the desired outcome.