SQL更改创建以更改语法错误

我收到了一个sql代码：

create table dbo.Dokumendid(
  id               int identity not Null primary key,
  idPersonal       int not Null references dbo.Personal on delete cascade,
  Liik             char(1) Not Null,                        -- Liik: L - lepingud, K - koolitused, T - tervisetõendid    
  FailiNimetus     nvarchar(200) not null,                  -- faili nimetus
  LaadimiseKpv     smalldatetime null,                      -- laadimise kpv
  Fail             varbinary(max) null,                     -- fail
  Markus           nvarchar(max) Null,                      -- märkus
  dtCreated        datetime default GetDate() Null,
  UserNameCreated  nvarchar(50) null,
  dtUpdated        datetime  null,
  UserNameUpdated  nvarchar(50) null
)
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create index IX_Personal on dbo.Dokumendid(idPersonal) on INDEXES
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但是我们已经有了表dbo.Dokumendid，所以当我将create更改为alter时，会出现错误：

Msg 102, Level 15, State 1, Line 1
Incorrect syntax near '('.
Msg 102, Level 15, State 1, Line 15
Incorrect syntax near '('.

我将其更改为：alter table dbo.dokumenid alter列 错误：

---

如果要内联添加外键，请执行以下操作：

create table dbo.Dokumendid(
  id               int identity not Null primary key,
  idPersonal       int not Null, --references dbo.Personal on delete cascade,
  Liik             char(1) Not Null,                        -- Liik: L - lepingud, K - koolitused, T - tervisetõendid    
  FailiNimetus     nvarchar(200) not null,                  -- faili nimetus
  LaadimiseKpv     smalldatetime null,                      -- laadimise kpv
  Fail             varbinary(max) null,                     -- fail
  Markus           nvarchar(max) Null,                      -- märkus
  dtCreated        datetime default GetDate() Null,
  UserNameCreated  nvarchar(50) null,
  dtUpdated        datetime  null,
  UserNameUpdated  nvarchar(50) null,
  CONSTRAINT FK_Dokumendid_idPersonal FOREIGN KEY (idPersonal) REFERENCES dbo.Personal (idPersonal) on delete cascade
)
Go

此外，您还可以在线添加索引创建（从SQL Server 2014）：

---

您可以在CREATETABLE语句上面使用以下代码：DROP table IF EXISTS dbo.Dokumendid Go我认为您正在尝试向现有表添加其他列，否则您可以使用alter table add Column语句将列添加到现有表中。

create table dbo.Dokumendid(
  id               int identity not Null primary key,
  idPersonal       int not Null, --references dbo.Personal on delete cascade,
  Liik             char(1) Not Null,                        -- Liik: L - lepingud, K - koolitused, T - tervisetõendid    
  FailiNimetus     nvarchar(200) not null,                  -- faili nimetus
  LaadimiseKpv     smalldatetime null,                      -- laadimise kpv
  Fail             varbinary(max) null,                     -- fail
  Markus           nvarchar(max) Null,                      -- märkus
  dtCreated        datetime default GetDate() Null,
  UserNameCreated  nvarchar(50) null,
  dtUpdated        datetime  null,
  UserNameUpdated  nvarchar(50) null,
  CONSTRAINT FK_Dokumendid_idPersonal FOREIGN KEY (idPersonal) REFERENCES dbo.Personal (idPersonal) on delete cascade
)
Go

create table dbo.Dokumendid(
  id               int identity not Null primary key,
  ...
  CONSTRAINT FK_Dokumendid_idPersonal FOREIGN KEY (idPersonal) REFERENCES dbo.Personal (idPersonal) on delete cascade,
  index IX_Personal(idPersonal)
)
Go