Quick Answer: Which One Will Delete The Table Data As Well As Table Structure?

Why truncate is DDL?

TRUNCATE resets the high water mark of the table, effectively eliminating all the previously existing rows.

Treating it as a DDL statement allows it to be super-fast, as it allows it to function without retaining undo (rollback) information like DML statements..

What is the difference between drop table and truncate table?

The DROP command is used to remove table definition and its contents. Whereas the TRUNCATE command is used to delete all the rows from the table. … DROP is a DDL(Data Definition Language) command. Whereas the TRUNCATE is also a DDL(Data Definition Language) command.

What’s difference between truncate and delete?

Everyone should know that DELETE is DML command and TRUNCATE is DDL command. DELETE deletes records one by one and makes an entry for each and every deletion in the transaction log, whereas TRUNCATE de-allocates pages and makes an entry for de-allocation of pages in the transaction log.

Which one will delete the table data as well as table structure Examveda?

The SQL DELETE statement is used to delete both the table structure and table data.

Which command deletes a table and all its data?

drop table commandThe drop table command is used to delete a table and all rows in the table. To delete an entire table including all of its rows, issue the drop table command followed by the tablename.

Is truncate faster than delete?

TRUNCATE removes all rows from a table. The operation cannot be rolled back and no triggers will be fired. As such, TRUNCATE is faster and doesn’t use as much undo space as a DELETE.

How can I delete all rows in a table without removing the table structure attributes and indexes?

DELETE statement Syntax DELETE FROM table_name WHERE Condition; To remove all the rows from the table: DELETE FROM table_name; This statement removes all the records from table but the table itself is not deleted, thus table structure, attributes and indexes remains intact.

Why use truncate instead of delete?

TRUNCATE is faster than DELETE , as it doesn’t scan every record before removing it. TRUNCATE TABLE locks the whole table to remove data from a table; thus, this command also uses less transaction space than DELETE . Unlike DELETE , TRUNCATE does not return the number of rows deleted from the table.

Which on will delete the table data as well as table structure?

Answer. Delete and Truncate commands used to delete table data and structure of the table. Explanation: To delete some of the data or rows from the table we use DELETE command it only deletes selected data or rows and it can roll back the data.

How will you delete the data of a table?

You can delete data from a table by deleting one or more rows from the table, by deleting all rows from the table, or by dropping columns from the table….To delete every row in a table:Use the DELETE statement without specifying a WHERE clause. … Use the TRUNCATE statement. … Use the DROP TABLE statement.

Which one is faster to completely delete data from a table?

TRUNCATE TABLE is functionally identical to DELETE statement with no WHERE clause: both remove all rows in the table. But TRUNCATE TABLE is faster and uses fewer system and transaction log resources than DELETE.

What is the difference between drop table and delete table in SQL?

Delete statement performs conditional based deletion, whereas Drop command deletes entire records in the table. Delete statement removes only the rows in the table and it preserves the table structure as same, and Drop command removes all the data in the table and the table structure.