dianshang-houduan/2026-07-05-userinfo-teacher-admin-nullable.sql at main - dianshang-houduan - 深圳天择教育科技有限公司

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 -- 允许 userinfo.teacher_admin 为空
 -- 背景：新增学生/普通用户时 teacher_admin 不是必填业务字段，旧库 NOT NULL 约束会导致插入失败。
 ALTER TABLE userinfo
   MODIFY COLUMN teacher_admin TINYINT(1) NULL DEFAULT 0 COMMENT '是否管理型老师：0-否 1-是';