生成db_user数据库的3条测试数据的sql，字段有uid,name,age,sex

INSERT INTO db_user (uid, name, age, sex) VALUES (1, 'John Smith', 30, 'male'); INSERT INTO db_user (uid, name, age, sex) VALUES (2, 'Jane Doe', 25, 'female'); INSERT INTO db_user (uid, name, age, sex) VALUES (3, 'Bob Johnson', 40, 'male');