MySQL DECLARE HANDLER: SQLSTATE Value Starting with '01'

In MySQL's DECLARE HANDLER statement, the condition value 'SQLSTATE' is used to specify errors based on their SQLSTATE values. When a SQLSTATE value starts with '01', it indicates a 'warning' condition. So the correct answer is 'd. SQLSTATE'.

Here's a breakdown of the other options:

• 'a. SQLWARNING': This condition value catches general warnings, not specifically those with SQLSTATE values starting with '01'.
• 'b. NOT FOUND': This condition value catches errors where a record is not found, usually associated with a SQLSTATE value of '02000'.
• 'c. SQLEXCEPTION': This condition value catches all types of exceptions, including warnings, errors, and severe failures.