Question

Table t_customer_statistics
trx_date - transaction date
cuid - id person(divide prospect and client)
lifecycle_status - this column must be filled

我需要根据客户的情况给他状态

被收购 - 本月是第一笔交易
存在 - 上个月有一笔交易
重新激活 - 上个月没有交易
sleeping - 最近 90 天没有交易（自上次交易以来没有后续交易，超过 90 天）我粗略的做了一个这样的代码

UPDATE t_customer_statistics
SET Lifecycle_status =
case
when to_char (trunc (trx_date, 'mm'), 'mm.yyyy') = to_char (trunc (sysdate, 'mm'), 'mm.yyyy') then 'acquired'
when to_char (trunc (trx_date, 'mm'), 'mm.yyyy') = to_char (trunc (sysdate, 'mm') - 1, 'mm.yyyy') then 'existing'
when to_char (trunc (trx_date, 'mm'), 'mm.yyyy') = to_char (trunc (sysdate, 'mm') - 40, 'mm.yyyy') then 'reactivated'
when to_char (trunc (trx_date, 'mm'), 'mm.yyyy') <to_char (trunc (sysdate, 'mm') - 90, 'mm.yyyy') then 'sleeping'
end

但是当他们给我举个例子的时候，如果客户端做了第一笔交易然后睡着了，那么他最后有两种状态，而且睡着必须分开，这样才有单独的附注。必须从第一个和最后一个事务开始考虑

Answer 1

您可以像这样使用 MERGE 语句：

MERGE INTO clients dst
USING (
  SELECT rowid rid,
         LEAD(dt, 1) OVER (PARTITION BY id ORDER BY dt DESC) AS prev_dt,
         LAG(dt, 1) OVER (PARTITION BY id ORDER BY dt DESC) AS next_dt
  FROM   clients
) src
ON ( dst.ROWID = src.rid )
WHEN MATCHED THEN
  UPDATE
  SET status = CASE
               WHEN prev_dt IS NULL
               THEN 'acquired'
               WHEN MONTHS_BETWEEN(TRUNC(dst.dt, 'MM'), TRUNC(src.prev_dt)) <= 1
               THEN 'existing'
               ELSE 'reactivated'
               END
               ||
               CASE
               WHEN COALESCE(src.next_dt, SYSDATE) >= dst.dt + INTERVAL '90' DAY
               THEN ', sleeping'
               END;

对于样本数据：

CREATE TABLE clients (id, dt, status ) AS
SELECT 1, DATE '2020-01-01', CAST( NULL AS VARCHAR2(20) ) FROM DUAL UNION ALL
SELECT 1, DATE '2020-02-01', CAST( NULL AS VARCHAR2(20) ) FROM DUAL UNION ALL
SELECT 1, DATE '2020-03-01', CAST( NULL AS VARCHAR2(20) ) FROM DUAL UNION ALL
SELECT 1, DATE '2020-05-01', CAST( NULL AS VARCHAR2(20) ) FROM DUAL UNION ALL
SELECT 1, DATE '2020-09-01', CAST( NULL AS VARCHAR2(20) ) FROM DUAL UNION ALL
SELECT 1, DATE '2020-10-01', CAST( NULL AS VARCHAR2(20) ) FROM DUAL UNION ALL
SELECT 1, DATE '2020-10-01' + INTERVAL '91' DAY, CAST( NULL AS VARCHAR2(20) ) FROM DUAL;

那么MERGE的结果是：

<块引用>

<头>

ID	DT	状态
1	01-JAN-20	获得
1	01-FEB-20	现有
1	01-MAR-20	现有
1	01-MAY-20	重新激活，休眠
1	01-SEP-20	重新激活
1	01-OCT-20	存在，睡眠
1	20 年 12 月 31 日	重新激活，休眠

db<>fiddle here

如何按时间提供客户的状态

1 个答案: