create table store ( storeID char(3)primary key, address char(20)not null default'下沉花园' for '地址', )修改这段代码

可以考虑修改以下几点：

1. 将类型为 char 的字段改为 varchar，因为 char 类型会占用定长存储空间，而 varchar 类型是变长的，可以更节省存储空间。

2. 去掉字段地址的默认值，因为默认值为下沉花园可能不适用于所有的店铺，最好由用户自己输入。

3. 将字段名 storeID 改为 store_id，更符合命名规范。

修改后的代码如下：

CREATE TABLE store (
  store_id varchar(3) PRIMARY KEY,
  address varchar(20) NOT NULL
);

相关问题

Create table user ( userID char(10) primary key, name varchar(6) not null, sex char(2) not null, ) create table clothes ( barcode char (20)primary key, brand varchar(20)not null, price float not null, introduction varchar(40)not null, type varchar(40)not null, date datetime ) create table customer ( customerID char(10)primary key, customername varchar(6)not null, phone char(11)not null, address varchar(40)not null, code char(6)not null check(Czip like ‘[0-9][0-9][0-9][0-9][0-9][0-9]’) ) create table supplier ( factoryID char(4)primary key, factoryname varchar(40)not null, contact varchar(6)not null, phone char(11)not null, address char(40)not null ) create table supply ( barcode char(20)references clothes(barcode), factoryID char(4)references supplier(factoryID), price float, amount int check(amount>0), date datetime, primary key(barcode ,factoryID,price,amount,date) ) create table store ( storeID char(3)primary key, address char(20)not null default’下沉花园’for地址, ) create table inventory ( storeID char(3)references store(storeID), barcode char(20)references clothes(barcode), amount int not null, primary key(storeID,barcode) ) create table order ( orderID char(6)primary key, transaction char(10)not null, date datetime not null, pricesum float not null check(pricesum>0), amount int not null, customerID char(10)references customer(customerID), barcode char(20)references clothes(barcode), userID char(10)references user(userID), ) create table shoppingcart ( shoppingcartID char(10)primary key, customerID char(10)not null, clothesID char(10)not null, amount int not null, ) create table logistics ( logisticsID char(20)primary key, company char(10)not null, customerID varchar(6)not null, phone char(11)not null, address varchar(40)not null, )

请问你想询问什么？以上是一段 SQL 语句，它创建了十个表格，分别是 user、clothes、customer、supplier、supply、store、inventory、order、shoppingcart、logistics，每个表格都有不同的属性和关系。你是否对这些表格和属性有什么疑问或需要更深入的了解？

CREATE TABLE CUSTOMER ( CustomerID NUMBER PRIMARY KEY, Name VARCHAR2(20), Address VARCHAR2(20), PhoneNumber VARCHAR2(20), Email VARCHAR2(30), LoyaltyStatus VARCHAR2(20) ); CREATE TABLE ORDERS ( OrderID NUMBER PRIMARY KEY, OrderDate DATE, OrderStatus VARCHAR2(20), TotalCost NUMBER, CustomerID NUMBER, CONSTRAINT FK_ORDER_CUSTOMER FOREIGN KEY (CustomerID) REFERENCES CUSTOMER(CustomerID) ); CREATE TABLE PRODUCT ( ProductID NUMBER PRIMARY KEY, ProductName VARCHAR2(20), Description VARCHAR2(20), Price NUMBER, Category VARCHAR2(20) ); CREATE TABLE ORDERS_DETAILS ( OrderDetailID NUMBER PRIMARY KEY, OrderID NUMBER, ProductID NUMBER, ProductName VARCHAR2(20), Price NUMBER, Quantity NUMBER, Subtotal NUMBER, CONSTRAINT FK_ORDER_DETAILS_ORDER FOREIGN KEY (OrderID) REFERENCES ORDERS(OrderID), CONSTRAINT FK_ORDER_DETAILS_PRODUCT FOREIGN KEY (ProductID) REFERENCES PRODUCT(ProductID) ); CREATE TABLE STORE ( StoreID NUMBER PRIMARY KEY, StoreName VARCHAR2(20), Location VARCHAR2(20), HoursOfOperation VARCHAR2(20) ); CREATE TABLE INVENTORY ( ProductID NUMBER, StoreID NUMBER, QuantityOnHand NUMBER, ReorderPoint NUMBER, PRIMARY KEY (ProductID, StoreID), CONSTRAINT FK_INVENTORY_PRODUCT FOREIGN KEY (ProductID) REFERENCES PRODUCT(ProductID), CONSTRAINT FK_INVENTORY_STORE FOREIGN KEY (StoreID) REFERENCES STORE(StoreID) ); CREATE TABLE "TRANSACTION" ( TransactionID NUMBER PRIMARY KEY, TransactionDate DATE, TransactionType VARCHAR2(20), TotalAmount NUMBER, CustomerID NUMBER, CONSTRAINT FK_TRANSACTION_CUSTOMER FOREIGN KEY (CustomerID) REFERENCES CUSTOMER(CustomerID) ); CREATE TABLE TRANSACTION_DETAILS ( TransactionDetailID NUMBER PRIMARY KEY, TransactionID NUMBER, ProductID NUMBER, ProductName VARCHAR2(20), Price NUMBER, Quantity NUMBER, Subtotal NUMBER, CONSTRAINT FK_TRANSACTION_DETAILS_TRANSACTION FOREIGN KEY (TransactionID) REFERENCES "TRANSACTION"(TransactionID), CONSTRAINT FK_TRANSACTION_DETAILS_PRODUCT FOREIGN KEY (ProductID) REFERENCES PRODUCT(ProductID) ); CREATE TABLE EMPLOYEE ( EmployeeID NUMBER PRIMARY KEY, Name VARCHAR2(20), Address VARCHAR2(20), PhoneNumber VARCHAR2(20), Email VARCHAR2(30), Position VARCHAR2(20) ); CREATE TABLE SALARY ( EmployeeID NUMBER, StartDate DATE, SalaryAmount NUMBER, EndDate DATE, PRIMARY KEY (EmployeeID, StartDate), CONSTRAINT FK_SALARY_EMPLOYEE FOREIGN KEY (EmployeeID) REFERENCES EMPLOYEE(EmployeeID) ); CREATE TABLE SHIFT ( ShiftID NUMBER PRIMARY KEY, StartTime TIMESTAMP, EndTime TIMESTAMP, StoreID NUMBER, EmployeeID NUMBER, CONSTRAINT FK_SHIFT_EMPLOYEE FOREIGN KEY (EmployeeID) REFERENCES EMPLOYEE(EmployeeID), CONSTRAINT FK_SHIFT_STORE FOREIGN KEY (StoreID) REFERENCES STORE(StoreID) )； 用BLOB的数据加密Price和PhoneNumber给出代码

可以使用DBMS_CRYPTO包中的加密函数来对表中的Price和PhoneNumber进行加密，加密后的数据可以存储在BLOB类型的列中。

以下是对Price和PhoneNumber进行加密的示例代码：

-- 创建表时添加BLOB类型的加密列
CREATE TABLE CUSTOMER (
   CustomerID NUMBER PRIMARY KEY,
   Name VARCHAR2(20),
   Address VARCHAR2(20),
   EncryptedPhoneNumber BLOB, -- 添加加密后的PhoneNumber列
   Email VARCHAR2(30),
   EncryptedPrice BLOB, -- 添加加密后的Price列
   LoyaltyStatus VARCHAR2(20)
);

-- 对PhoneNumber进行加密并存储到EncryptedPhoneNumber列中
DECLARE
   l_phone_number VARCHAR2(20) := '123-456-7890'; -- 原始的PhoneNumber数据
   l_key RAW(128) := UTL_RAW.CAST_TO_RAW('my_secret_key'); -- 密钥
   l_encrypted_data BLOB;
BEGIN
   l_encrypted_data := DBMS_CRYPTO.ENCRYPT(
      UTL_RAW.CAST_TO_RAW(l_phone_number),
      DBMS_CRYPTO.DES_CBC_PKCS5,
      l_key
   );
   UPDATE CUSTOMER SET EncryptedPhoneNumber = l_encrypted_data WHERE CustomerID = 1;
END;
/

-- 对Price进行加密并存储到EncryptedPrice列中
DECLARE
   l_price NUMBER := 100.0; -- 原始的Price数据
   l_key RAW(128) := UTL_RAW.CAST_TO_RAW('my_secret_key'); -- 密钥
   l_encrypted_data BLOB;
BEGIN
   l_encrypted_data := DBMS_CRYPTO.ENCRYPT(
      UTL_RAW.CAST_TO_RAW(TO_CHAR(l_price)),
      DBMS_CRYPTO.DES_CBC_PKCS5,
      l_key
   );
   UPDATE PRODUCT SET EncryptedPrice = l_encrypted_data WHERE ProductID = 1;
END;
/

需要注意的是，解密数据时需要使用相应的密钥和解密函数，否则无法获取原始数据。