SQL脚本不创建表

Question

我目前正在尝试做一个简单的数据库，但每次运行脚本时，它都会创建数据库，但不会创建任何表，任何创意？

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

摆脱你降表，并确保使用USE关键字和数据库名称更改数据库环境。如果您想要像查询数据库一样检查表的存在，则查询是否存在于sys.tables中。

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) 
 
);

Answer 2

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 
); 

- 丢失; ？

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 3

1. 你有use master所以你的表可能去那里。
2. 在创建它之前，您将放弃Users表。 （由于你删除了数据库，所有的表都被隐式删除）。
3. 您在某些行末尾丢失了一些分号。

Answer 4

我同意stazima，你设置数据库为主，所以你的表可能在那里。

设置脚本来使用新的数据库将有助于：

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) 
);