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  • Truncate and drop difference

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    Truncate and drop both are similar to each other as they are used to delete the complete data of a table.

    The difference between them is this truncate only delete the data of the table where as the table structure is there but when we drop the table the table data is deleted and also the table structure.

     

    truncate

     

    TRUNCATE TABLE  table_name;

    ex

    +----+----------+-----+-----------+----------+
    | 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 |
    +----+----------+-----+-----------+----------+
    TRUNCATE TABLE CUSTOMERS;

    now select the data

    SELECT * FROM CUSTOMERS;

    The result

    Empty set (0.00 sec)

     

    drop

     

    +---------+---------------+------+-----+---------+-------+
    | Field   | Type          | Null | Key | Default | Extra |
    +---------+---------------+------+-----+---------+-------+
    | ID      | int(11)       | NO   | PRI |         |       |
    | NAME    | varchar(20)   | NO   |     |         |       |
    | AGE     | int(11)       | NO   |     |         |       |
    | ADDRESS | char(25)      | YES  |     | NULL    |       |
    | SALARY  | decimal(18,2) | YES  |     | NULL    |       |
    +---------+---------------+------+-----+---------+-------+

    drop table

    DROP TABLE CUSTOMERS;
    select table
    
    DESC CUSTOMERS;

    The result

    ERROR 1146 (42S02): Table 'TEST.CUSTOMERS' doesn't exist

     

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