Question

我目前正在尝试创建一个简单的数据库，但每次运行脚本时，它都会创建数据库，但不会创建任何表，任何想法？

use master
IF EXISTS(select * from sys.databases where name = 'MyWebDB')
DROP DATABASE MyWebDB

CREATE DATABASE MyWebDB
DROP TABLE Users
CREATE TABLE Users
(
UserID int IDENTITY PRIMARY KEY,
EmailAddress varchar(100) NOT NULL,
FirstName varchar(50) NOT NULL,
LastName varchar(50) NOT NULL,
);
CREATE TABLE Products(
ProductID int IDENTITY PRIMARY KEY,
ProductName varchar(100) NOT NULL
);
DROP TABLE Downloads
CREATE TABLE Downloads(
DownloadID int IDENTITY PRIMARY KEY,
UserID int FOREIGN KEY REFERENCES Users(UserID),
DownloadDate datetime NOT NULL,
FileName varchar(100) NOT NULL,
ProductID int FOREIGN KEY REFERENCES Products(ProductID)
);

Answer 1

你有use master所以你的桌子可能会去那里。
您甚至在创建之前删除了Users表。（由于您删除了数据库，所有表都被隐式删除）。
你在某些行的末尾错过了一些分号。

Answer 2

删除drop table并确保使用USE关键字和数据库名称更改数据库上下文。如果要像检查数据库一样检查表是否存在，请查询是否存在于sys.tables中。

＆＃13;

USE master
GO
IF EXISTS(select * from sys.databases where name = 'MyWebDB')
DROP DATABASE MyWebDB

CREATE DATABASE MyWebDB
USE MyWebDB
GO
CREATE TABLE Users
(
UserID int IDENTITY PRIMARY KEY,
EmailAddress varchar(100) NOT NULL,
FirstName varchar(50) NOT NULL,
LastName varchar(50) NOT NULL,
);
CREATE TABLE Products(
ProductID int IDENTITY PRIMARY KEY,
ProductName varchar(100) NOT NULL
);
CREATE TABLE Downloads(
DownloadID int IDENTITY PRIMARY KEY,
UserID int FOREIGN KEY REFERENCES Users(UserID),
DownloadDate datetime NOT NULL,
FileName varchar(100) NOT NULL,
ProductID int FOREIGN KEY REFERENCES Products(ProductID)
);

＆＃13;

Answer 3

use master;
IF EXISTS(select * from sys.databases where name = 'MyWebDB')
DROP DATABASE MyWebDB;

CREATE DATABASE MyWebDB;

-- added line
USE MyWebDB;

DROP TABLE Users;
CREATE TABLE Users
(
UserID int IDENTITY PRIMARY KEY,
EmailAddress varchar(100) NOT NULL,
FirstName varchar(50) NOT NULL,
LastName varchar(50) NOT NULL,
);
CREATE TABLE Products(
ProductID int IDENTITY PRIMARY KEY,
ProductName varchar(100) NOT NULL
);

- 失踪; ？

DROP TABLE Downloads;
CREATE TABLE Downloads(
DownloadID int IDENTITY PRIMARY KEY,
UserID int FOREIGN KEY REFERENCES Users(UserID),
DownloadDate datetime NOT NULL,
FileName varchar(100) NOT NULL,
ProductID int FOREIGN KEY REFERENCES Products(ProductID)
);

Answer 4

我同意stazima，你正在设置数据库以掌握，所以你的表可能就在那里。

设置脚本以使用新数据库将有所帮助：

use master
IF EXISTS(select * from sys.databases where name = 'MyWebDB')
DROP DATABASE MyWebDB

CREATE DATABASE MyWebDB;
USE MyWebDB;
GO

DROP TABLE Users;
CREATE TABLE Users
(
UserID int IDENTITY PRIMARY KEY,
EmailAddress varchar(100) NOT NULL,
FirstName varchar(50) NOT NULL,
LastName varchar(50) NOT NULL,
);
CREATE TABLE Products(
ProductID int IDENTITY PRIMARY KEY,
ProductName varchar(100) NOT NULL
);
DROP TABLE Downloads;
CREATE TABLE Downloads(
DownloadID int IDENTITY PRIMARY KEY,
UserID int FOREIGN KEY REFERENCES Users(UserID),
DownloadDate datetime NOT NULL,
FileName varchar(100) NOT NULL,
ProductID int FOREIGN KEY REFERENCES Products(ProductID)
);

SQL脚本没有创建表

4 个答案: