Quick Answer

Handle column value truncation.

Understanding the Issue

Occurs when inserting data that exceeds a column's defined size or type constraints.

The Problem

This code demonstrates the issue:

Sql Error 
INSERT INTO users (name) VALUES ('Very long name exceeding column definition');

The Solution

Here's the corrected code:

Sql Fixed 
-- Solution 1: Modify column size
ALTER TABLE users MODIFY name VARCHAR(255);

-- Solution 2: Validate data before insert
SET @name = 'Very long name...';
INSERT INTO users (name) 
VALUES (CASE WHEN LENGTH(@name) <= 50 THEN @name ELSE LEFT(@name, 50) END);

-- Solution 3: Use strict mode to prevent silent truncation
SET sql_mode = 'STRICT_TRANS_TABLES';

-- Solution 4: Check column definitions
SHOW COLUMNS FROM users;

Key Takeaways

Ensure column definitions match expected data requirements.