Which SQL command delete all the records and remove the structure of table?

Which SQL command delete all the records and does not remove the structure?

The TRUNCATE TABLE statement removes all the rows from a table, but the table structure and its columns, constraints, indexes, and so on remain intact. To remove the table definition in addition to its data, you can use the DROP TABLE statement.

Which command will delete both data and structure of a table?

The SQL DROP command is used to remove an object from the database. If you drop a table, all the rows in the table is deleted and the table structure is removed from the database.

Which SQL statement will permanently remove all the data and structure of the table?

The SQL TRUNCATE TABLE command is used to delete complete data from an existing table.

Why use truncate instead of delete?

Truncate removes all records and doesn’t fire triggers. Truncate is faster compared to delete as it makes less use of the transaction log. Truncate is not possible when a table is referenced by a Foreign Key or tables are used in replication or with indexed views.

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What is delete command in SQL?

In the database structured query language (SQL), the DELETE statement removes one or more records from a table. A subset may be defined for deletion using a condition, otherwise all records are removed.

Is truncate faster than 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 .

Which SQL keyword is used to delete a table structure?

The SQL DROP TABLE statement is used to remove a table definition and all the data, indexes, triggers, constraints and permission specifications for that table.

Which command should you use to remove a table from a database?

We use the SQL DROP Table command to drop a table from the database. It completely removes the table structure and associated indexes, statistics, permissions, triggers and constraints.

How many tables can be join in SQL query?

Theoretically, there is no upper limit on the number of tables that can be joined using a SELECT statement. (One join condition always combines two tables!) However, the Database Engine has an implementation restriction: the maximum number of tables that can be joined in a SELECT statement is 64.

How do you clear a table in SQL?

To delete every row in a table:

  1. Use the DELETE statement without specifying a WHERE clause. With segmented table spaces, deleting all rows of a table is very fast. …
  2. Use the TRUNCATE statement. The TRUNCATE statement can provide the following advantages over a DELETE statement: …
  3. Use the DROP TABLE statement.
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