Question

我正在尝试使用存储过程创建一个表。我将表编写为CREATE语句并将文件内容复制到我的过程中，这非常有用。除了设置默认值时，它将第一列默认设置为整个第二行。

这是程序：

CREATE PROCEDURE [dbo].[spCreatetblLocation]
AS
EXEC 
('
 SET ANSI_NULLS ON
 SET QUOTED_IDENTIFIER ON

 CREATE TABLE [dbo].[tblLocation](
  [pkLocationID] [int] IDENTITY(1,1) NOT NULL,
  [fldName] [nvarchar](100) NOT NULL,
  [fldPath] [nvarchar](1000) NOT NULL,
  [fkYearID] [int] NOT NULL,
  CONSTRAINT [PK_LocationID] PRIMARY KEY CLUSTERED 
  (
   [pkLocationID] ASC
  )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
  ) ON [PRIMARY]

 ALTER TABLE [dbo].[tblLocation] ADD  DEFAULT N'' FOR [fldName]

 ALTER TABLE [dbo].[tblLocation] ADD  DEFAULT N'' FOR [fldPath]
 ')

执行后，列[fldName]的默认值为FOR [fldName] ALTER TABLE [dbo].[tblLocation] ADD DEFAULT N'' FOR [fldPath]

有意义的是，它不会识别（N＆＃39;＆＃39;）中的第二个引号，但为什么不呢？我该如何解决？

更新

我了解到创建表的正确方法是通过读取和执行sql脚本文件。这使数据操作和数据库操作分离，并且更易于管理。

Answer 1

如果SQL中的字符串中有撇号，则需要使用附加的撇号来转义它。尝试：

CREATE PROCEDURE [dbo].[spCreatetblLocation]
AS
EXEC 
('
 SET ANSI_NULLS ON
 SET QUOTED_IDENTIFIER ON

 CREATE TABLE [dbo].[tblLocation](
  [pkLocationID] [int] IDENTITY(1,1) NOT NULL,
  [fldName] [nvarchar](100) NOT NULL,
  [fldPath] [nvarchar](1000) NOT NULL,
  [fkYearID] [int] NOT NULL,
  CONSTRAINT [PK_LocationID] PRIMARY KEY CLUSTERED 
  (
   [pkLocationID] ASC
  )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
  ) ON [PRIMARY]

 ALTER TABLE [dbo].[tblLocation] ADD  DEFAULT N'''' FOR [fldName]

 ALTER TABLE [dbo].[tblLocation] ADD  DEFAULT N'''' FOR [fldPath]
 ')

我不清楚（至少对我来说）为什么你这样做，而不仅仅是：

CREATE PROCEDURE [dbo].[spCreatetblLocation]
AS
 SET ANSI_NULLS ON
 SET QUOTED_IDENTIFIER ON

 CREATE TABLE [dbo].[tblLocation](
  [pkLocationID] [int] IDENTITY(1,1) NOT NULL,
  [fldName] [nvarchar](100) NOT NULL,
  [fldPath] [nvarchar](1000) NOT NULL,
  [fkYearID] [int] NOT NULL,
  CONSTRAINT [PK_LocationID] PRIMARY KEY CLUSTERED 
  (
   [pkLocationID] ASC
  )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
  ) ON [PRIMARY]

 ALTER TABLE [dbo].[tblLocation] ADD  DEFAULT N'' FOR [fldName]

 ALTER TABLE [dbo].[tblLocation] ADD  DEFAULT N'' FOR [fldPath]

还不清楚为什么要在程序中创建一个表，特别是不检查它是否已经存在 - 你能保证每次运行程序时该表都不存在吗？

Answer 2

在字符串中必须加倍引号：

CREATE PROCEDURE [dbo].[spCreatetblLocation]
AS
EXEC ('
   SET ANSI_NULLS ON
 SET QUOTED_IDENTIFIER ON

 CREATE TABLE [dbo].[tblLocation](
  [pkLocationID] [int] IDENTITY(1,1) NOT NULL,
  [fldName] [nvarchar](100) NOT NULL,
  [fldPath] [nvarchar](1000) NOT NULL,
  [fkYearID] [int] NOT NULL,
  CONSTRAINT [PK_LocationID] PRIMARY KEY CLUSTERED 
  (
   [pkLocationID] ASC
  )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
  ) ON [PRIMARY]

 ALTER TABLE [dbo].[tblLocation] ADD  DEFAULT N'''' FOR [fldName]

 ALTER TABLE [dbo].[tblLocation] ADD  DEFAULT N'''' FOR [fldPath]
 ')`

Answer 3

不是说通过存储过程创建表是正确的，但是......你需要转义引号：

CREATE PROCEDURE [dbo].[spCreatetblLocation]
AS
EXEC 
('
 SET ANSI_NULLS ON
 SET QUOTED_IDENTIFIER ON

 CREATE TABLE [dbo].[tblLocation](
  [pkLocationID] [int] IDENTITY(1,1) NOT NULL,
  [fldName] [nvarchar](100) NOT NULL,
  [fldPath] [nvarchar](1000) NOT NULL,
  [fkYearID] [int] NOT NULL,
  CONSTRAINT [PK_LocationID] PRIMARY KEY CLUSTERED 
  (
   [pkLocationID] ASC
  )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
  ) ON [PRIMARY]

 ALTER TABLE [dbo].[tblLocation] ADD  DEFAULT N'''' FOR [fldName]

 ALTER TABLE [dbo].[tblLocation] ADD  DEFAULT N'''' FOR [fldPath]
 ')

SQL create table存储过程未正确设置默认值

3 个答案: