How to Resolve the \'Field \'id\' Doesn\'t Have a Default Value\' Error in MySQL?

Troubleshooting "Field 'id' Doesn't Have a Default Value" in MySQL

When encountering the error "Field 'id' doesn't have a default value," it often pertains to the definition of the primary key column within a table. The id field, a common choice for a primary key, ensures unique identification of each row. However, when left undefined, MySQL throws this error upon encountering an INSERT statement.

Solution:

1. Auto Incrementation: To address this issue, the id field can be defined with the AUTO_INCREMENT attribute. This allows MySQL to automatically generate sequential values for new rows, eliminating the need to specify them explicitly.

CREATE TABLE card_games (
  id INT(11) NOT NULL AUTO_INCREMENT,
  ...
  PRIMARY KEY (id)
);

2. Manual Assignment: Alternatively, you can manually specify a unique value for the id field in each INSERT statement. However, it is crucial to ensure uniqueness to maintain data integrity and prevent duplicate rows.

INSERT INTO card_games (
  id,
  nafnleiks,
  ...
)
VALUES
  (1, 'Svartipétur', ...);

By implementing either method and defining the id field appropriately, you can resolve the error and establish a properly defined table with a unique identifier for each record.

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