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backend/script/sql/xg_reset_accommodation_and_apply_bed.sql

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+-- 用途：
+-- 1) 清空所有学生的住宿信息
+-- 2) 将学籍状态为“在读(student_status=1)”的学生统一标记为“申请床位(is_boarder=1)”
+--
+-- 依据代码：
+-- - 批量申请床位逻辑：xg_student_msg.is_boarder = 1
+-- - 学籍状态在读：xg_student_msg.student_status = '1'
+--
+-- 执行前建议：
+-- - 先在测试环境验证
+-- - 如需限制租户，可在每条SQL追加: AND tenant_id = 0
+
+START TRANSACTION;
+
+-- =========================
+-- Step 1: 删除/清空住宿信息
+-- =========================
+
+-- 1.1 清空学生表中的住宿字段，同时重置是否住校
+UPDATE xg_student_msg
+SET
+    dormitory_building = NULL,
+    dormitory_room = NULL,
+    ext_field1 = NULL,      -- 床位ID
+    is_boarder = 0,
+    update_time = NOW()
+WHERE deleted = 0;
+
+-- 1.2 逻辑删除床位-学生分配关系（相当于删除住宿分配记录）
+UPDATE xg_dorm_bed_student
+SET
+    deleted = '1',
+    update_time = NOW()
+WHERE deleted = '0';
+
+-- 1.3 重置床位状态为空闲
+UPDATE xg_dorm_bed
+SET
+    bed_status = '0',
+    update_time = NOW()
+WHERE deleted = '0';
+
+-- =========================
+-- Step 2: 在读学生统一申请床位
+-- =========================
+
+-- 系统“批量申请床位”对应逻辑：仅更新 is_boarder = 1
+UPDATE xg_student_msg
+SET
+    is_boarder = 1,
+    update_time = NOW()
+WHERE deleted = 0
+  AND student_status = '1';
+
+COMMIT;
+
+-- 可选核对SQL（执行后可单独运行）
+-- SELECT COUNT(1) AS boarding_apply_count FROM xg_student_msg WHERE deleted = 0 AND student_status = '1' AND is_boarder = 1;
+-- SELECT COUNT(1) AS active_bed_rel_count FROM xg_dorm_bed_student WHERE deleted = '0';
+-- SELECT COUNT(1) AS occupied_bed_count FROM xg_dorm_bed WHERE deleted = '0' AND bed_status = '1';