what is truncate in sql

1TRUNCATE TABLE  table_name;
2

1TRUNCATE TABLE table;

1DELETE -
2-DML COMMAND
3-Delete Rows from the table one by one
4-We can use where clause with Delete to delete single row
5-Delete is slower than truncate
6-ROLLBACK is possible with DELETE
7
8DROP-
9-DDL COMMAND
10-Delete the entire structure or schema
11-We can't use where clause with drop
12-Drop is slower than DELETE & TRUNCATE
13-ROLLBACK IS NOT POSSIBLE WITH DROP
14
15TRUNCATE-
16-DDL COMMAND
17-Truncate deletes rows at a one goal
18-We can't use where clause with Truncate
19-Truncate faster than both DELETE & DROP
20-Rollback is not possible with Truncate

1-- Truncate number with cast
2UPDATE my_table
3SET my_column = CAST(my_column AS INT)
4WHERE ...;
5-- or convert
6UPDATE my_table
7SET my_column = CONVERT(INT, my_column)
8WHERE ...;