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MySQL: PRIMARY KEYS are easy
#MySQL #tutorial #course 00:00:00 introduction 00:00:46 PRIMARY KEY with a new table 00:01:34 PRIMARY KEY with an existing table 00:02:11 examples 00:04:56 conclusion – EXAMPLE 1 -- CREATE TABLE transactions ( transaction_id INT PRIMARY KEY, amount DECIMAL(5, 2) ); – EXAMPLE 2 -- ALTER TABLE transactions ADD CONSTRAINT PRIMARY KEY ...
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