SQL脚本修改表结构

SQL脚本修改表结构 
新建表:
create table [表名]
(
[自动编号字段] int IDENTITY (1,1) PRIMARY KEY ,
[字段1] nVarChar(50) default '默认值' null ,
[字段2] ntext null ,
[字段3] datetime,
[字段4] money null ,
[字段5] int default 0,
[字段6] Decimal (12,4) default 0,
[字段7] image null ,
)

删除表:
Drop table [表名]

Truncate table [表名] --不写log 而且自增字段复位从1开始

插入数据:
INSERT INTO [表名] (字段1,字段2) VALUES (1,'ABC')

删除数据:
DELETE FROM [表名] WHERE [字段名]>100

更新数据:
UPDATE [表名] SET [字段1] = 1,[字段2] = 'ABC' WHERE [字段三] = 'what'

新增字段:
ALTER TABLE [表名] ADD [字段名] NVARCHAR (50) NULL

删除字段:
ALTER TABLE [表名] DROP COLUMN [字段名]

修改字段名称:

sp_rename   'IncidentReport.CompletedById ', 'CompletedBy', 'column '    

修改字段:
ALTER TABLE [表名] ALTER COLUMN [字段名] NVARCHAR (50) NULL

重命名表:(Access 重命名表,请参考文章:在Access数据库中重命名表)
sp_rename '表名', '新表名', 'OBJECT'

新建约束:
ALTER TABLE [表名] ADD CONSTRAINT 约束名 CHECK ([约束字段] <= '2010-12-1')

删除约束:
ALTER TABLE [表名] DROP CONSTRAINT 约束名

删除索引:

DROP INDEX [IX_afk_ProtectionRisk_ProtectionDepartment] ON [ProtectionRisk] ;
go

新建默认值
ALTER TABLE [表名] ADD CONSTRAINT 默认值名 DEFAULT 'ABC' FOR [字段名]

删除默认值
ALTER TABLE [表名] DROP CONSTRAINT 默认值名

 

新增主外键关系:

ALTER TABLE [dbo].[IncidentReport] WITH CHECK ADD CONSTRAINT [FK_IncidentReport_IncidentReportTemplate] FOREIGN KEY([IncidentReportTemplateId])
REFERENCES [dbo].[IncidentReportTemplate] ([Id])
GO

新增字段含默认值

ALTER TABLE incidenttemplate ADD IsShowHealthCheck bit NOT NULL default 1

 

添加一行新数据:

IF ((Select count(*) from [dbo].[DifficultyLevel]) = 0)

       BEGIN

              SET IDENTITY_INSERT [dbo].[DifficultyLevel] ON

             

              INSERT [dbo].[DifficultyLevel] ([Id]) VALUES (1)

              INSERT [dbo].[DifficultyLevelTranslation] ([Id], [Language], [TITLE], [IsSynchronized]) VALUES (1, 'xx-XX', 'Default',1)

 

              SET IDENTITY_INSERT [dbo].[DifficultyLevel] OFF

       END

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