Why Am I Getting a 'Truncated incorrect DOUBLE value' Error in My MySQL UPDATE Statement?

MySQL "Truncated incorrect DOUBLE value" Error

When attempting to execute an UPDATE statement in MySQL, an error message of "1292 - Truncated incorrect DOUBLE value" may arise. This error indicates that the value provided for the specified column in the SET clause is not of the expected data type.

In the given example, the error occurs when attempting to update the "name" column of the "shop_category" table with the value "Secolul XVI - XVIII." The error suggests that the value is being truncated because it contains non-numeric characters.

Explanation:

The "shop_category" table structure indicates that the "name" column is defined as a VARCHAR(250) data type, which is designed to store character strings. However, in the UPDATE statement, the value being assigned to the "name" column includes non-numeric characters (- and space). MySQL interprets this value as a DOUBLE data type, which is not compatible with the VARCHAR data type of the "name" column.

Solution:

To fix the error, remove the non-numeric characters from the value being assigned to the "name" column. The corrected UPDATE statement should be as follows:

<code class="sql">UPDATE shop_category
SET name = 'Secolul XVI - XVIII', name_eng = '16th to 18th centuries'
WHERE category_id = 4768;</code>

With this correction, the UPDATE statement will successfully update the specified rows in the "shop_category" table, without encountering the "Truncated incorrect DOUBLE value" error.

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