Question

我正在寻找从头开始创建给定表所需的'create table'语句。我对主键约束，唯一约束，外键约束和列名称特别感兴趣。

我如何在Oracle和/或SQL Server中执行此操作？

奇怪的是，我对数据库的唯一连接是来自Linux机器的ODBC连接。虽然对于Oracle我几乎可以肯定地启动并运行SQL * Plus。

Answer 1

在Oracle中使用

select dbms_metadata.get_ddl('TABLE','DEMO_ORDERS') from dual;

它将返回类似

的内容

  CREATE TABLE "OWNER"."DEMO_ORDERS" 
   (    "ORDER_ID" NUMBER NOT NULL ENABLE, 
    "CUSTOMER_ID" NUMBER NOT NULL ENABLE, 
    "ORDER_TOTAL" NUMBER(8,2), 
    "ORDER_TIMESTAMP" DATE, 
    "USER_ID" NUMBER, 
     CONSTRAINT "DEMO_ORDER_TOTAL_MIN" CHECK (order_total >= 0) ENABLE, 
     CONSTRAINT "DEMO_ORDER_PK" PRIMARY KEY ("ORDER_ID")
  USING INDEX PCTFREE 10 INITRANS 2 MAXTRANS 255 COMPUTE STATISTICS 
  STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
  PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)
  TABLESPACE "USERS"  ENABLE, 
     CONSTRAINT "DEMO_ORDERS_CUSTOMER_ID_FK" FOREIGN KEY ("CUSTOMER_ID")
      REFERENCES "OWNER"."DEMO_CUSTOMERS" ("CUSTOMER_ID") ENABLE, 
     CONSTRAINT "DEMO_ORDERS_USER_ID_FK" FOREIGN KEY ("USER_ID")
      REFERENCES "OWNER"."DEMO_USERS" ("USER_ID") ENABLE
   ) PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255 NOCOMPRESS LOGGING
  STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645
  PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1 BUFFER_POOL DEFAULT)
  TABLESPACE "USERS"

您可以使用各种设置来过滤或排除您不想要的位。

begin
 DBMS_METADATA.SET_TRANSFORM_PARAM(DBMS_METADATA.SESSION_TRANSFORM,'STORAGE',false);
 DBMS_METADATA.SET_TRANSFORM_PARAM(DBMS_METADATA.SESSION_TRANSFORM,'PRETTY',true);
 DBMS_METADATA.SET_TRANSFORM_PARAM(DBMS_METADATA.SESSION_TRANSFORM,
       'SQLTERMINATOR',true);
 DBMS_METADATA.SET_TRANSFORM_PARAM(DBMS_METADATA.SESSION_TRANSFORM, 
       'SEGMENT_ATTRIBUTES',false);
end;

将给出

  CREATE TABLE "OWNER"."DEMO_ORDERS" 
   (    "ORDER_ID" NUMBER NOT NULL ENABLE, 
    "CUSTOMER_ID" NUMBER NOT NULL ENABLE, 
    "ORDER_TOTAL" NUMBER(8,2), 
    "ORDER_TIMESTAMP" DATE, 
    "USER_ID" NUMBER, 
     CONSTRAINT "DEMO_ORDER_TOTAL_MIN" CHECK (order_total >= 0) ENABLE, 
     CONSTRAINT "DEMO_ORDER_PK" PRIMARY KEY ("ORDER_ID") ENABLE, 
     CONSTRAINT "DEMO_ORDERS_CUSTOMER_ID_FK" FOREIGN KEY ("CUSTOMER_ID")
      REFERENCES "OWNER"."DEMO_CUSTOMERS" ("CUSTOMER_ID") ENABLE, 
     CONSTRAINT "DEMO_ORDERS_USER_ID_FK" FOREIGN KEY ("USER_ID")
      REFERENCES "OWNER"."DEMO_USERS" ("USER_ID") ENABLE
   ) ;

Answer 2

在SQL Server中，最简单的方法是右键单击表格 - ＆gt;脚本表格为 - ＆gt;创建 - ＆gt;新的查询窗口。它将创建这样的东西，我在AdventureWorks数据库中选择了HumanResources.EmployeeAddress表

USE [AdventureWorks]
GO

/****** Object:  Table [HumanResources].[EmployeeAddress]    Script Date: 09/01/2010 20:05:14 ******/
SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO

CREATE TABLE [HumanResources].[EmployeeAddress](
    [EmployeeID] [int] NOT NULL,
    [AddressID] [int] NOT NULL,
    [rowguid] [uniqueidentifier] ROWGUIDCOL  NOT NULL,
    [ModifiedDate] [datetime] NOT NULL,
 CONSTRAINT [PK_EmployeeAddress_EmployeeID_AddressID] PRIMARY KEY CLUSTERED 
(
    [EmployeeID] ASC,
    [AddressID] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY]

GO

EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'Primary key. Foreign key to Employee.EmployeeID.' , @level0type=N'SCHEMA',@level0name=N'HumanResources', @level1type=N'TABLE',@level1name=N'EmployeeAddress', @level2type=N'COLUMN',@level2name=N'EmployeeID'
GO

EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'Primary key. Foreign key to Address.AddressID.' , @level0type=N'SCHEMA',@level0name=N'HumanResources', @level1type=N'TABLE',@level1name=N'EmployeeAddress', @level2type=N'COLUMN',@level2name=N'AddressID'
GO

EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'ROWGUIDCOL number uniquely identifying the record. Used to support a merge replication sample.' , @level0type=N'SCHEMA',@level0name=N'HumanResources', @level1type=N'TABLE',@level1name=N'EmployeeAddress', @level2type=N'COLUMN',@level2name=N'rowguid'
GO

EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'Date and time the record was last updated.' , @level0type=N'SCHEMA',@level0name=N'HumanResources', @level1type=N'TABLE',@level1name=N'EmployeeAddress', @level2type=N'COLUMN',@level2name=N'ModifiedDate'
GO

EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'Cross-reference table mapping employees to their address(es).' , @level0type=N'SCHEMA',@level0name=N'HumanResources', @level1type=N'TABLE',@level1name=N'EmployeeAddress'
GO

EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'Primary key (clustered) constraint' , @level0type=N'SCHEMA',@level0name=N'HumanResources', @level1type=N'TABLE',@level1name=N'EmployeeAddress', @level2type=N'CONSTRAINT',@level2name=N'PK_EmployeeAddress_EmployeeID_AddressID'
GO

ALTER TABLE [HumanResources].[EmployeeAddress]  WITH CHECK ADD  CONSTRAINT [FK_EmployeeAddress_Address_AddressID] FOREIGN KEY([AddressID])
REFERENCES [Person].[Address] ([AddressID])
GO

ALTER TABLE [HumanResources].[EmployeeAddress] CHECK CONSTRAINT [FK_EmployeeAddress_Address_AddressID]
GO

EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'Foreign key constraint referencing Address.AddressID.' , @level0type=N'SCHEMA',@level0name=N'HumanResources', @level1type=N'TABLE',@level1name=N'EmployeeAddress', @level2type=N'CONSTRAINT',@level2name=N'FK_EmployeeAddress_Address_AddressID'
GO

ALTER TABLE [HumanResources].[EmployeeAddress]  WITH CHECK ADD  CONSTRAINT [FK_EmployeeAddress_Employee_EmployeeID] FOREIGN KEY([EmployeeID])
REFERENCES [HumanResources].[Employee] ([EmployeeID])
GO

ALTER TABLE [HumanResources].[EmployeeAddress] CHECK CONSTRAINT [FK_EmployeeAddress_Employee_EmployeeID]
GO

EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'Foreign key constraint referencing Employee.EmployeeID.' , @level0type=N'SCHEMA',@level0name=N'HumanResources', @level1type=N'TABLE',@level1name=N'EmployeeAddress', @level2type=N'CONSTRAINT',@level2name=N'FK_EmployeeAddress_Employee_EmployeeID'
GO

ALTER TABLE [HumanResources].[EmployeeAddress] ADD  CONSTRAINT [DF_EmployeeAddress_rowguid]  DEFAULT (newid()) FOR [rowguid]
GO

EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'Default constraint value of NEWID()' , @level0type=N'SCHEMA',@level0name=N'HumanResources', @level1type=N'TABLE',@level1name=N'EmployeeAddress', @level2type=N'CONSTRAINT',@level2name=N'DF_EmployeeAddress_rowguid'
GO

ALTER TABLE [HumanResources].[EmployeeAddress] ADD  CONSTRAINT [DF_EmployeeAddress_ModifiedDate]  DEFAULT (getdate()) FOR [ModifiedDate]
GO

EXEC sys.sp_addextendedproperty @name=N'MS_Description', @value=N'Default constraint value of GETDATE()' , @level0type=N'SCHEMA',@level0name=N'HumanResources', @level1type=N'TABLE',@level1name=N'EmployeeAddress', @level2type=N'CONSTRAINT',@level2name=N'DF_EmployeeAddress_ModifiedDate'
GO

还有sp_help，但它没有给你一个脚本

sp_help 'HumanResources.EmployeeAddress'

以编程方式，您可以使用.NET或SSIS中的SQL Server Management Objects (SMO)

Answer 3

好的 - 我有点困惑。你的头衔说了一件事，你的问题又说了另一件事。

标题中的问题：

Oracle：使用“describe table”

SQL Server sp_columns表或sp_help表以获取更多信息。

对于您的书面问题：

Oracle：http://www.adp-gmbh.ch/ora/sql/create_table.html

SQL Server：http://msdn.microsoft.com/en-us/library/aa258255(SQL.80).aspx

Oracle和/或SQL Server相当于MySQL的DESCRIBE [表]？

3 个答案: