-- 查询挂号记录表主键的SQL语句
-- 表名：adm_encounter
-- 主键字段：id (bigint，雪花算法生成)

-- ========================================
-- 1. 查询所有挂号记录的主键（简单查询）
-- ========================================
SELECT id
FROM adm_encounter
WHERE delete_flag = '0'
ORDER BY id DESC;

-- ========================================
-- 2. 查询最近N条挂号记录的主键
-- ========================================
SELECT id
FROM adm_encounter
WHERE delete_flag = '0'
ORDER BY start_time DESC
LIMIT 10;

-- ========================================
-- 3. 查询指定日期范围内的挂号记录主键
-- ========================================
SELECT id
FROM adm_encounter
WHERE delete_flag = '0'
  AND DATE(start_time) >= '2026-01-01'
  AND DATE(start_time) <= '2026-01-31'
ORDER BY start_time DESC;

-- ========================================
-- 4. 查询指定科室的挂号记录主键
-- ========================================
SELECT id
FROM adm_encounter
WHERE delete_flag = '0'
  AND organization_id = 123  -- 替换为实际的科室ID
ORDER BY start_time DESC;

-- ========================================
-- 5. 查询指定患者的挂号记录主键
-- ========================================
SELECT id
FROM adm_encounter
WHERE delete_flag = '0'
  AND patient_id = 456  -- 替换为实际的患者ID
ORDER BY start_time DESC;

-- ========================================
-- 6. 查询主键及基本信息（常用）
-- ========================================
SELECT 
    id AS 主键ID,
    bus_no AS 就诊编码,
    patient_id AS 患者ID,
    organization_id AS 科室ID,
    registrar_id AS 医生ID,
    display_order AS 流水号序号,
    start_time AS 挂号时间,
    status_enum AS 状态
FROM adm_encounter
WHERE delete_flag = '0'
ORDER BY start_time DESC
LIMIT 20;

-- ========================================
-- 7. 统计主键数量（按日期分组）
-- ========================================
SELECT 
    DATE(start_time) AS 日期,
    COUNT(id) AS 挂号记录数,
    MIN(id) AS 最小主键ID,
    MAX(id) AS 最大主键ID
FROM adm_encounter
WHERE delete_flag = '0'
GROUP BY DATE(start_time)
ORDER BY 日期 DESC
LIMIT 30;

-- ========================================
-- 8. 查询主键的最大值、最小值、总数
-- ========================================
SELECT 
    COUNT(*) AS 总记录数,
    MIN(id) AS 最小主键ID,
    MAX(id) AS 最大主键ID,
    MAX(id) - MIN(id) AS 主键ID范围
FROM adm_encounter
WHERE delete_flag = '0';

-- ========================================
-- 9. 根据主键查询单条记录（精确查询）
-- ========================================
SELECT *
FROM adm_encounter
WHERE id = 1996923066055286785  -- 替换为实际的主键ID
  AND delete_flag = '0';

-- ========================================
-- 10. 查询主键及关联的患者信息
-- ========================================
SELECT 
    e.id AS 挂号记录主键ID,
    e.bus_no AS 就诊编码,
    e.display_order AS 流水号序号,
    e.start_time AS 挂号时间,
    p.id AS 患者ID,
    p.name AS 患者姓名,
    p.bus_no AS 患者业务号
FROM adm_encounter e
INNER JOIN adm_patient p ON e.patient_id = p.id AND p.delete_flag = '0'
WHERE e.delete_flag = '0'
ORDER BY e.start_time DESC
LIMIT 20;