Question

INSERT INTO OrderNew (
SalesOrderID,
OrderDate,
DueDate,
ShipDate,
OnlineOrderFlag,
CustomerID,
CreditCardID,
SubTotal,
TaxAmt,
Freight,
TotalDue,
OrderInfo.salesorderdetail,
OrderInfo.orderqty ,
OrderInfo.productid, 
OrderInfo.unitprice,
OrderInfo.unitpricediscount,
OrderInfo.linetotal
)
SELECT h."SalesOrderID" , h."OrderDate", h."DueDate", h."ShipDate", h."OnlineOrderFlag", h."CustomerID", h."CreditCardID", h."SubTotal", h."TaxAmt", h."Freight", h."TotalDue", d."SalesOrderDetailID", d."OrderQty", d."ProductID", d."UnitPrice", d."UnitPriceDiscount", d."LineTotal"
FROM "SalesOrderHeader" h
INNER JOIN "SalesOrderDetail" d ON  d."SalesOrderID" = h."SalesOrderID"
WHERE d."SalesOrderID" = h."SalesOrderID" ;

这是我用来从其他一些表导入数据的代码。但是，我希望最后一列像嵌套表。这些是我想成为一个的表。因此，对于表格中的一个销售订单ID＆＃34; SalesOrderHeader＆＃34;表格上有几个或多个具有相同销售订单ID的记录＆＃34; SalesOrderDetail＆＃34;。那么，我该怎么做呢？使用函数？

我不知道我是否可以理解。但我可以提供更多信息。

Answer 1

您可以创建两种类型，以便将新表缩小，该表将是SalesOrderHeader和SalesOrderDetail的组合。

CREATE TYPE Shipping AS(OrderDate Date,DueDate Date,ShipDate Date);

CREATE TYPE ordersdetails AS (details text);

然后你创建表。

CREATE TABLE ordernew ( salesorderid serial NOT NULL, shippinginfo shipping, onlineorderflag integer, customerid serial NOT NULL, creditcardid integer, subtotal real, taxamt real, freight real, totaldue real, orderinfo ordersdetails[]);

对于数据，您只需复制其他两个表中的数据，但编写正确的查询以便不创建重复记录。所以，代码如下。

INSERT INTO OrderNew (
SalesOrderID,
OrderDate,
DueDate,
ShipDate,
OnlineOrderFlag,
CustomerID,CreditCardID,
SubTotal,
TaxAmt,
Freight,
TotalDue,
OrderInfo.salesorderdetail,
OrderInfo.orderqty ,
OrderInfo.productid,
OrderInfo.unitprice,
OrderInfo.unitpricediscount,
OrderInfo.linetotal
)
SELECT h."SalesOrderID" , h."OrderDate", h."DueDate", h."ShipDate", h."OnlineOrderFlag",
h."CustomerID", h."CreditCardID", h."SubTotal", h."TaxAmt", h."Freight", h."TotalDue",
d."SalesOrderDetailID", d."OrderQty", d."ProductID", d."UnitPrice", d."UnitPriceDiscount", d."LineTotal"
FROM "SalesOrderHeader" h
INNER JOIN "SalesOrderDetail" d ON d."SalesOrderID" = h."SalesOrderID"
WHERE d."SalesOrderID" = h."SalesOrderID" ;

要简单地查看最近插入的数据，请运行以下查询：

SELECT orderinfo FROM ordernew;

将数据导入到其中包含嵌套表的新表

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