diff between DELETE and TRUNCATE?.
Answers were Sorted based on User's Feedback
Answer / sandeep desai
Some more additions
With Truncate command Oracle sets the High Water Mark to
Zero
whereas
With Delete command this doesn't happen since data is not
released from the memory
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / chaitanyabilla
delete-low water mark level
truncate-high water level
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / sahaja mallarapu
Delete is a DML command.
Truncate is a DDL command.
Using delete we can delete specific rows by applying some
condition.
using truncate all rows are deleted. we cant apply any
condition here.
deleted rows can be rollbacked.
truncated rows cant be rollbacked.
memory occupied by deleted rows cant be reused.
memory occupied by truncated rows can be reused.
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / padma
delete comd is used to delete not a specific record rather
all records without affecting the structure of the records
truncate comd is used to delete all the records from
existing table,retaining the structure o that table.
by using delete comd v can rollback all the delete
records .it is record level cmd
wherease truncate cmd v cannot rollback. it is table
level cmd
Is This Answer Correct ? | 1 Yes | 3 No |
From the following identify the non schema object: packages, triggers, public synonyms, tables and indexes.
What are inner join and outer join?
Tab A A B ------ 1 A 2 B 3 C Tab B A B ----- 4 D 5 E 6 F Generate the value into B table from A table. Only table A has the value. Write the SQL query to get B table value.
What is oracle used for?
What is the difference between Delete, Truncate and Drop in Oracle?
What is a Shared SQL pool ?
what are the advantages of running a database in NO archive log mode?
How to check the oracle tns settings?
can you write commit in triggers?
Explain index?
How to drop an index in oracle?
does the query needs a hint to access a materialized view?