Sql Server中
1,增加数据:
insert into MessageList (Name,Emails,Contents) values ('王海鹏','tcnf2008@hotmail.com','dd')
表名(列) values (数据项);
代码
// 在数据表里创建一个新行,并把当前属性的值插入对应的列中
public int Create()
{
//建立数据库连接
SqlConnection connection = new SqlConnection(_Connectionstring);
connection.open();//打开数据库连接
//建立数据库连接对象
SqlCommand command = new SqlCommand("insert into Customers "
+"(LastName,FirstName,Address,City,State,Zip,Phone,"
+"SignUpDate) values (@LastName,@FirstName,@Address,"
+"@City,@Zip,@Phone,@SignUpDate)",connection);
//将要插入的数据加入数据库中
command.Parameters.AddWithValue("@LastName",_LastName);
command.Parameters.AddWithValue("@FirstName",_FirstName);
command.Parameters.AddWithValue("@Address",_Address);
command.Parameters.AddWithValue("@City",_City);
command.Parameters.AddWithValue("@Zip",_Zip);
command.Parameters.AddWithValue("@Phone",_Phone);
command.Parameters.AddWithValue("@SingUpDate",_SingUpDate);
command.ExecuteNonQuery();//执行连接语句
command.Parameters.Clear();
command.CommandText = "select @@IDENTITY"; //查找主键
int newCustomerID = Convert.ToInt32(command.ExecuteScalar());
connection.Close();//关闭连接
_CustomerID = newCustomerID;
return newCustomerID;
}
2,删除数据:
3,修改数据:
4,查询语句:
select * from user where ulname like '%ad%'
SECLET * FROM 图书表 WHERE 作者 LIKE '%
5,执行SQL语句:
sqlcmd.connection.open();
sqlcmd.ExecuteNonQuery();