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CREATE TABLE USER
(
NAME VARCHAR(20) NOT NULL,---ÐÕÃû
BIRTHDAY DATE---ÉúÈÕ
); 
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ALTER TABLE ±í {ADD ADD{COLUMN ×Ö¶ÎÀàÐÍ [ (×Ö³¤)] [NOT NULL]     [CONSTRAINT Ë÷Òý ] |
     ALTER COLUMN ×Ö¶ÎÀàÐÍ [(×Ö³¤)] |
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