SELECT unique SQL關於「MySQL UNIQUE key」標籤，搜尋引擎有相關的訊息討論：
24.6.1 Partitioning Keys, Primary Keys, and Unique Keysdev.mysql.com › doc › refman › partitioning-limitations-p...1.6.3.1 PRIMARY KEY and UNIQUE Index Constraintsdev.mysql.com › doc › refman › constraint-primary-keyHow do I specify unique constraint for multiple columns in MyS