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Key « Table « MySQL Tutorial
MySQL Tutorial
Table
Key
4.14.Key
4.14.1.
Multiple-Column Keys
4.14.2.
Partial Keys
4.14.3.
Choose partial key in table creation
4.14.4.
Composite Partial Keys
4.14.5.
SHOW KEYS FROM Employee Table
4.14.6.
ALTER TABLE Employee DROP KEY lastn_idx;