最新话题
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https://www.bilibili.com/video/BV1GG4y1d7Bk/?spm_id_from333.788vd_source58fd1221f82d2634787ed94790e0...0499
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CREATE TABLE user_wallet (wallet_id INT AUTO_INCREMENT PRIMARY KEY,user_id INT NOT NULL,balance DECI...0631
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FOREIGN KEY 外键约束 在CREATE TABLE 时添加 主表和从表；父表和子表 1 先创建主表 CREATE TABLE dept1( dept_id INT, dept_nam...0495
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https://blog.csdn.net/hezuijiudexiaobai/article/details/1078227130549
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https://blog.csdn.net/weixin_44187116/article/details/1070734710526
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