Sql 在具有匹配id的另一个表的查询中的列中插入值'；s

我有两张桌子：

Cust360：

Customer_id int primary key,
Gender nvarchar(50),
Basket_count int null,

Cust_id int,
Transaction_id int,
tran_date datetime,
total_amt int

交易：

Customer_id int primary key,
Gender nvarchar(50),
Basket_count int null,

Cust_id int,
Transaction_id int,
tran_date datetime,
total_amt int

我必须使用 一天内多次购买等于一篮子的不同购买计数

SELECT COUNT(tran_date)
FROM Transactions
GROUP BY tran_date, cust_id
HAVING COUNT(tran_date) > 1

我想在cust360的

Basket\u count

列中插入这些值，其中

---

cust\u id

from

transactions

与cust360的匹配。

您需要在

UPDATE

语句中对

Customer\u id

和

cust\u id

执行

内部联接。您已经将问题标记为
MySQL
和
sqlserver
RDBMS，因此结构略有不同

MySQL示例：

UPDATE Cust360 c
INNER JOIN (
    SELECT Cust_id, COUNT(t.tran_date) cnt
    FROM Transactions t
    GROUP BY t.tran_date, t.cust_id
    HAVING COUNT(tran_date) > 1) t2 ON c.Customer_id = t2.Cust_id
SET c.Basket_count = t2.cnt;

UPDATE c
SET c.Basket_count = t2.cnt
FROM Cust360 c
INNER JOIN (
    SELECT Cust_id, COUNT(t.tran_date) cnt
    FROM Transactions t
    GROUP BY t.tran_date, t.cust_id
    HAVING COUNT(tran_date) > 1) t2 ON c.Customer_id = t2.Cust_id

UPDATE Cust360 c
INNER JOIN (
    SELECT Cust_id, COUNT(t.tran_date) cnt, SUM(t.total_amt) total
    FROM Transactions t
    GROUP BY t.tran_date, t.cust_id
    HAVING COUNT(tran_date) > 1) t2 ON c.Customer_id = t2.Cust_id
SET c.Basket_count = t2.cnt,
    c.TotalAmount = t2.total;

UPDATE c
SET c.Basket_count = t2.cnt
    , c.TotalAmount = t2.total
FROM Cust360 c
INNER JOIN (
    SELECT Cust_id, COUNT(t.tran_date) cnt, SUM(t.total_amt) total
    FROM Transactions t
    GROUP BY t.tran_date, t.cust_id
    HAVING COUNT(tran_date) > 1) t2 ON c.Customer_id = t2.Cust_id

SQL Server（Transact/T-SQL）示例：

UPDATE Cust360 c
INNER JOIN (
    SELECT Cust_id, COUNT(t.tran_date) cnt
    FROM Transactions t
    GROUP BY t.tran_date, t.cust_id
    HAVING COUNT(tran_date) > 1) t2 ON c.Customer_id = t2.Cust_id
SET c.Basket_count = t2.cnt;

UPDATE c
SET c.Basket_count = t2.cnt
FROM Cust360 c
INNER JOIN (
    SELECT Cust_id, COUNT(t.tran_date) cnt
    FROM Transactions t
    GROUP BY t.tran_date, t.cust_id
    HAVING COUNT(tran_date) > 1) t2 ON c.Customer_id = t2.Cust_id

UPDATE Cust360 c
INNER JOIN (
    SELECT Cust_id, COUNT(t.tran_date) cnt, SUM(t.total_amt) total
    FROM Transactions t
    GROUP BY t.tran_date, t.cust_id
    HAVING COUNT(tran_date) > 1) t2 ON c.Customer_id = t2.Cust_id
SET c.Basket_count = t2.cnt,
    c.TotalAmount = t2.total;

UPDATE c
SET c.Basket_count = t2.cnt
    , c.TotalAmount = t2.total
FROM Cust360 c
INNER JOIN (
    SELECT Cust_id, COUNT(t.tran_date) cnt, SUM(t.total_amt) total
    FROM Transactions t
    GROUP BY t.tran_date, t.cust_id
    HAVING COUNT(tran_date) > 1) t2 ON c.Customer_id = t2.Cust_id






此外，假设您现在想要收集
总金额
的
SUM（）
，您可以在Cust360表中添加一个名为
TotalAmount
的列，然后：

MySQL示例：

UPDATE Cust360 c
INNER JOIN (
    SELECT Cust_id, COUNT(t.tran_date) cnt
    FROM Transactions t
    GROUP BY t.tran_date, t.cust_id
    HAVING COUNT(tran_date) > 1) t2 ON c.Customer_id = t2.Cust_id
SET c.Basket_count = t2.cnt;

UPDATE c
SET c.Basket_count = t2.cnt
FROM Cust360 c
INNER JOIN (
    SELECT Cust_id, COUNT(t.tran_date) cnt
    FROM Transactions t
    GROUP BY t.tran_date, t.cust_id
    HAVING COUNT(tran_date) > 1) t2 ON c.Customer_id = t2.Cust_id

UPDATE Cust360 c
INNER JOIN (
    SELECT Cust_id, COUNT(t.tran_date) cnt, SUM(t.total_amt) total
    FROM Transactions t
    GROUP BY t.tran_date, t.cust_id
    HAVING COUNT(tran_date) > 1) t2 ON c.Customer_id = t2.Cust_id
SET c.Basket_count = t2.cnt,
    c.TotalAmount = t2.total;

UPDATE c
SET c.Basket_count = t2.cnt
    , c.TotalAmount = t2.total
FROM Cust360 c
INNER JOIN (
    SELECT Cust_id, COUNT(t.tran_date) cnt, SUM(t.total_amt) total
    FROM Transactions t
    GROUP BY t.tran_date, t.cust_id
    HAVING COUNT(tran_date) > 1) t2 ON c.Customer_id = t2.Cust_id

SQL Server（Transact/T-SQL）示例：

UPDATE Cust360 c
INNER JOIN (
    SELECT Cust_id, COUNT(t.tran_date) cnt
    FROM Transactions t
    GROUP BY t.tran_date, t.cust_id
    HAVING COUNT(tran_date) > 1) t2 ON c.Customer_id = t2.Cust_id
SET c.Basket_count = t2.cnt;

UPDATE c
SET c.Basket_count = t2.cnt
FROM Cust360 c
INNER JOIN (
    SELECT Cust_id, COUNT(t.tran_date) cnt
    FROM Transactions t
    GROUP BY t.tran_date, t.cust_id
    HAVING COUNT(tran_date) > 1) t2 ON c.Customer_id = t2.Cust_id

UPDATE Cust360 c
INNER JOIN (
    SELECT Cust_id, COUNT(t.tran_date) cnt, SUM(t.total_amt) total
    FROM Transactions t
    GROUP BY t.tran_date, t.cust_id
    HAVING COUNT(tran_date) > 1) t2 ON c.Customer_id = t2.Cust_id
SET c.Basket_count = t2.cnt,
    c.TotalAmount = t2.total;

UPDATE c
SET c.Basket_count = t2.cnt
    , c.TotalAmount = t2.total
FROM Cust360 c
INNER JOIN (
    SELECT Cust_id, COUNT(t.tran_date) cnt, SUM(t.total_amt) total
    FROM Transactions t
    GROUP BY t.tran_date, t.cust_id
    HAVING COUNT(tran_date) > 1) t2 ON c.Customer_id = t2.Cust_id

您按交易日期、客户id分组，这意味着同一客户id将有多个结果。但您的客户id是cust36中的主键？您面临哪些问题？两个RDBMS中提到的是哪一个？它是MS SQL SERVER。根据上面的查询，我在更新篮子计数值时遇到了问题。我想设置与客户id匹配的篮子计数行值自从OP确认SQL Server以来我已经更新了我的答案。您能在SQL Server脚本中重新编写一个吗