What are the differences between drop a table and truncate
a table?
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Answer Posted / soumik
1.DELETE table will result into deletion of data from the
table without affecting the table structure. But since
delete statement is a DML(Data Manipulation Language)
statement, it directly dosnt reflect the database. In other
words, the deleted data will be stored in a separate
tablespace called UNDO tablespace(which takes up memory)
that can be retrieved by using a ROLLBACK statement.
2. DROP table results into loss of data and structure both
which cannot be retrieved. Drop statement is DDL(Data
Definition Language) which is AUTO-COMMIT.
3. TRUNCATE table will clear the data from the table only
without affecting the table structure. Data cannot be
retrieved after executing this statement as well, since it
an AUTO-COMMIT statement. Truncate is also a DDL statement.
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