The main difference between deletion and truncation is that delete deletes one, several or all records from the table, while truncation deletes all records as well as the table structure from the database yes
- What is delete
- What is truncation
- Difference between delete and truncate
The main difference between delete and truncation is that delete deletes one, some or all of the records from the table, while truncation deletes all records as well as the table structure from the database.
A database is a collection of related data. A database management system (DBMS) allows you to create and manage data in databases. In addition, the DBMS that follows the relational model is a relational database management system (RDBMS). It stores data in tables, and the tables are related to each other. Structured Query Language (SQL) allows the user to write queries to manipulate data in tables. There are various SQL commands, and two of them are delete and truncate.
Key areas covered
1. What is delete
- definition, functionality
2. What is truncation
- definition, functionality
3. What is the difference between deletion and truncation
- Comparison of the main differences
DBMS, delete, DBMS, truncation
What is delete
The delete command helps you delete records from a table in a database. Refer to the table below titled Student.
The SQL statement, like all records from the student table, should be deleted.
remove from student;
You can also delete a specific record from the table.
remove from student, where id = 2;
Here, this SQL statement will delete the record with ID 2. After executing this statement, there will be two records in the table: records with IDs 1 and 3.
What is truncation
The truncate command helps to remove all records from a table. It also removes the table structure from the database. Therefore, when the truncate command is executed for a specific table, the primary key is also initialized.
The following SQL command deletes all records from the student table. In addition, it removes the table structure from the database.
truncated student table;
Difference between delete and truncate
delete is a DML command that deletes one or more records from a table in the database, whereas truncate is a DDL command that marks the extents of a table to be freed. So this is the fundamental difference between deleting and truncating.
The main difference between delete and truncate is that while the delete command deletes one, some, or all of the records from the table according to the specified SQL statement, the truncate command removes all records and table structure from the database.
Also, another difference between delete and truncate is that the delete command does not affect the table structure, while the truncate command removes the table structure from the database.
Command type is also the difference between delete and truncate. Although delete is a Data Manipulation Language (DML) command, truncate is a Data Definition Language (DDL) command.
where is the point
Alternatively, you can use the where clause with the delete command to filter and delete records. However, you cannot use a where clause with the truncate command.
Execution speed is another difference between delete and truncate. Since the delete command maintains a log, this is slow. However, because the truncate command maintains minimal transaction log logging, it runs faster.
Association with index views
In addition, you can use the delete command with indexed views, but you cannot use the truncate command with indexed views.
Required transaction space
In addition, the delete command uses more transaction space than the truncate command. Hence, this is another difference between delete and truncate.
In short, delete and truncate are two SQL commands. But the main difference between deletion and truncation is that deleting removes one, some, or all of the records from the table, while truncation removes all records as well as the table structure from the database.