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]插入数据:
INSERT INTO [表名] (字段1,字段2) VALUES (100,\'51WINDOWS.NET\')删除数据:
DELETE FROM [表名] WHERE [字段名]>100更新数据:
UPDATE [表名] SET [字段1] = 200,[字段2] = \'51WINDOWS.NET\' WHERE [字段三] = \'HAIWA\'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:
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] <= \'2000-1-1\')删除约束:
ALTER TABLE [表名] DROP CONSTRAINT 约束名新建默认值
ALTER TABLE [表名] ADD CONSTRAINT 默认值名 DEFAULT \'51WINDOWS.NET\' FOR [字段名]删除默认值
ALTER TABLE [表名] DROP CONSTRAINT 默认值名删除Sql Server 中的日志,减小数据库文件大小
dump transaction 数据库名 with no_logbackup log 数据库名 with no_logdbcc shrinkdatabase(数据库名)exec sp_dboption \'数据库名\', \'autoshrink\', \'true\'\\\'添加字段通用函数
Sub AddColumn(TableName,ColumnName,ColumnType)Conn.Execute(\"Alter Table \"&TableName&\" Add \"&ColumnName&\" \"&ColumnType&\"\")End Sub\\\'更改字段通用函数
Sub ModColumn(TableName,ColumnName,ColumnType)Conn.Execute(\"Alter Table \"&TableName&\" Alter Column \"&ColumnName&\" \"&ColumnType&\"\")End Sub\\\'检查表是否存在
sql=\"select count(*) as dida from sysobjects where id = object_id(N\'[所有者].[表名]\') and OBJECTPROPERTY(id, N\'IsUserTable\') = 1\"
set rs=conn.execute(sql)
response.write rs(\"dida\")\'返回一个数值,0代表没有,1代表存在
判断表的存在:select * from sysobjects where id = object_id(N\'[dbo].[tablename]\') and OBJECTPROPERTY(id, N\'IsUserTable\') = 1某个表的结构
select * from syscolumns where id = object_id(N\'[dbo].[你的表名]\') and OBJECTPROPERTY(id, N\'IsUserTable\') = 1