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2024-12-09 表连接(2)渣男去过我对象没去过,那就用LeftJoin 
select a.mch_nm as asshole_tried,a.trx_cnt, b.mch_nm as darling_tried from 
(select mch_nm, count(1) trx_cnt
from cmb_usr_trx_rcd
where year(trx_time) in (2023,2024) and usr_id='5201314520'
group by mch_nm
having count(1) >=20)a
left join
(select distinct mch_nm
from cmb_usr_trx_rcd
where year(trx_time) in (2023,2024) and usr_id='5211314521')b
on a.mch_nm = b.mch_nm order by 2 desc
2024-12-09 表连接(2)渣男去过我对象没去过,那就用LeftJoin 
select * from cmb_usr_trx_rcd limit 5
2024-11-02 招建银行信用卡中心客户挽留-电商平台分类 
SELECT 
merchant_name,
CASE 
WHEN merchant_name LIKE '%小红书%' OR merchant_name LIKE '%行吟信息科技' THEN '小红书'
WHEN merchant_name LIKE '%拼多多%' OR merchant_name LIKE '%上海寻梦信息技术%'THEN '拼多多'
WHEN merchant_name LIKE '%京东%' OR merchant_name LIKE '%网银在线%' OR merchant_name LIKE '%京东平台商户%' THEN '京东'
WHEN merchant_name LIKE '%抖音生活服务商家%' OR merchant_name LIKE '%合众易宝%' OR merchant_name LIKE '%格物致品网络科技%' OR merchant_name LIKE '%成都所见所得科技%' OR merchant_name LIKE '%北京空间变换科技%' THEN '抖音'
WHEN merchant_name LIKE '%淘宝%' OR merchant_name LIKE '%天猫%' OR merchant_name LIKE '%杭州今日卖场%' THEN '淘系'
ELSE '其他'
END AS platform
FROM 
(select distinct mch_nm as merchant_name from ccb_trx_rcd)t
2024-11-02 招建银行信用卡中心客户挽留-电商平台分类 
SELECT 
merchant_name,
CASE 
WHEN merchant_name LIKE '%小红书%' OR merchant_name LIKE '%行吟信息科技' THEN '小红书'
WHEN merchant_name LIKE '%拼多多%' OR merchant_name LIKE '%上海寻梦信息技术%'THEN '拼多多'
WHEN merchant_name LIKE '%京东%' OR merchant_name LIKE '%网银在线%' OR merchant_name LIKE '%京东平台商户%' THEN '京东'
WHEN merchant_name LIKE '%抖音生活服务商家%'OR merchant_name LIKE '%成都所见所得科技%'THEN '抖音'
WHEN merchant_name LIKE '%淘宝%' OR merchant_name LIKE '%天猫%' OR merchant_name LIKE '%杭州今日卖场%' THEN '淘系'
ELSE '其他'
END AS platform
FROM 
(select distinct mch_nm as merchant_name from ccb_trx_rcd)t