SQL tutorials for Business Analyst – SQL | TRUNCATE TABLE

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(SQL tutorials for Business Analyst & Beginners)

In this end-to-end example, you will learn – SQL Tutorials for Business Analyst: SQL | TRUNCATE TABLE.

 

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

You can also use DROP TABLE command to delete complete table but it would remove complete table structure form the database and you would need to re-create this table once again if you wish you store some data.

Syntax

The basic syntax of a TRUNCATE TABLE command is as follows.

TRUNCATE TABLE  table_name;

Example

Consider a CUSTOMERS table having the following records −

+----+----------+-----+-----------+----------+
| ID | NAME     | AGE | ADDRESS   | SALARY   |
+----+----------+-----+-----------+----------+
|  1 | Ramesh   |  32 | Ahmedabad |  2000.00 |
|  2 | Khilan   |  25 | Delhi     |  1500.00 |
|  3 | kaushik  |  23 | Kota      |  2000.00 |
|  4 | Chaitali |  25 | Mumbai    |  6500.00 |
|  5 | Hardik   |  27 | Bhopal    |  8500.00 |
|  6 | Komal    |  22 | MP        |  4500.00 |
|  7 | Muffy    |  24 | Indore    | 10000.00 |
+----+----------+-----+-----------+----------+

Following is the example of a Truncate command.

SQL > TRUNCATE TABLE CUSTOMERS;

Now, the CUSTOMERS table is truncated and the output from SELECT statement will be as shown in the code block below −

SQL> SELECT * FROM CUSTOMERS;
Empty set (0.00 sec)

 

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