我的为啥会是这样啊
CREATE TABLE tb2(
-> username VARCHAR(20) NOT NULL,
-> age TINYINT UNSIGNED NULL
-> );
ERROR 1050 (42S01): Table 'tb1' already exists
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CREATE TABLE tb2(
-> username VARCHAR(20) NOT NULL,
-> age TINYINT UNSIGNED NULL
-> );
ERROR 1050 (42S01): Table 'tb1' already exists
2019-09-09
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