How to Fix \'Data Truncated for Column\' Error in MySQL When Increasing Column Length?

Data Truncation Issue in MySQL

When modifying a MySQL column to accommodate extended data, you may encounter a "Data truncated for column" error. This response addresses such an issue, specifically regarding a call ID column with 34-character strings.

The error occurs because the column's data type is not properly configured to store the intended data. In this case, the incoming_Cid column is defined as CHAR(1) while it should be CHAR(34).

To resolve this:

1. Check the current length of the incoming_Cid column:

ALTER TABLE calls SHOW COLUMNS LIKE 'incoming_Cid';

2. Issue the following command to change the column's length:

ALTER TABLE calls CHANGE incoming_Cid incoming_Cid CHAR(34);

This will update the column's data type to accommodate the desired 34-character string.

Once the column's data type is correctly defined, you should be able to successfully update the data without encountering the truncation error.

The above is the detailed content of How to Fix \'Data Truncated for Column\' Error in MySQL When Increasing Column Length?. For more information, please follow other related articles on the PHP Chinese website!