基本的数据库操作脚本

-- add column
IF NOT  EXISTS (SELECT * FROM sys.columns WHERE name='WOAServedStatus' AND object_id=OBJECT_ID('WOA'))
BEGIN
 ALTER table [WOA] add  WOAServedStatus INT NULL 
END

--增加一个约束
IF NOT EXISTS (SELECT * FROM dbo.sysobjects WHERE id = OBJECT_ID(N'[DF_WOA_WOAServedStatus]') AND type = 'D')
BEGIN
ALTER TABLE [dbo].[WOA] ADD  CONSTRAINT [DF_WOA_WOAServedStatus]  DEFAULT ((0)) FOR [WOAServedStatus]
END

	
--add foreign key
IF NOT  EXISTS (SELECT * FROM sys.foreign_keys WHERE object_id = OBJECT_ID(N'[dbo].[FK_WOA_WOAServedStatus]') AND parent_object_id = OBJECT_ID(N'[dbo].[WOA]'))
BEGIN
ALTER TABLE [dbo].[WOA]  WITH CHECK ADD  CONSTRAINT [FK_WOA_WOAServedStatus] FOREIGN KEY([WOAServedStatus])
REFERENCES [dbo].[WOAServedStatus] ([WSSIntNo])
ALTER TABLE [dbo].[WOA] CHECK CONSTRAINT [FK_WOA_WOAServedStatus]
END

--add index
IF NOT EXISTS (SELECT * FROM sys.indexes WHERE object_id = OBJECT_ID(N'[dbo].[WOA]') AND name = N'IX_WOA_WOAServedStatus')
BEGIN
CREATE NONCLUSTERED INDEX [IX_WOA_WOAServedStatus] ON [dbo].[WOA] 
(
	[WOAServedStatus] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, SORT_IN_TEMPDB = OFF, IGNORE_DUP_KEY = OFF, DROP_EXISTING = OFF, ONLINE = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON, FILLFACTOR = 90) ON [PRIMARY]
END