“MySQL Drop -Primärschlüssel” Code-Antworten

MySQL ändern Primärschlüssel

ALTER TABLE tableName MODIFY COLUMN id INT; /* First you should drop auto increment */
ALTER TABLE tableName DROP PRIMARY KEY; /* Dop primary key */
ALTER TABLE tableName ADD PRIMARY KEY (new_id); /* Set primary key to the new column */
ALTER TABLE tableName MODIFY COLUMN new_id INT AUTO_INCREMENT; /* Set auto increment to the new primary key */
Cute Crayfish

MySQL Drop -Primärschlüssel

ALTER TABLE user_customer_permission MODIFY id INT NOT NULL;
ALTER TABLE user_customer_permission DROP PRIMARY KEY;
Real Rat

MySQL Drop -Schlüssel

ALTER TABLE tbl_quiz_attempt_master
  DROP INDEX `PRIMARY`;
Sal-versij

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