create table player_profile player_ID int PRIMARY KEY NOT NULL CONSTRAINT SevenDigitMax_Constraint CHECK (player_ID BETWEEN 0 AND 9999999), player_name VARCHAR(30) DEFAULT 'GUEST PLAYER', ...

Added when no foreign key constraint exists. Actual behavior. The "alter table xxx add constraint xxx foreign key xxx" command is executed each time. Reason analyze (If you can) For example, the ...