C# 使用t-SQL创建数据库而不指定其文件名
我尝试运行以下SQL语句来创建数据库:C# 使用t-SQL创建数据库而不指定其文件名,c#,asp.net,sql,sql-server,tsql,C#,Asp.net,Sql,Sql Server,Tsql,我尝试运行以下SQL语句来创建数据库: string strSQL = "CREATE DATABASE " + strDatabaseName + " ON PRIMARY " + "(" + "SIZE = 10MB, FILEGROWTH = 20%) " + "LOG ON (" + "SIZE = 5MB, " + "FILEGROWTH = 20%)" + " COLLATE SQL_Latin1_General_CP1_CI_
string strSQL = "CREATE DATABASE " + strDatabaseName +
" ON PRIMARY " +
"(" +
"SIZE = 10MB, FILEGROWTH = 20%) " +
"LOG ON (" +
"SIZE = 5MB, " +
"FILEGROWTH = 20%)" +
" COLLATE SQL_Latin1_General_CP1_CI_AS;";
我想使用默认的.mdf和.ldf文件位置,但要指定大小和文件增长参数。问题是,当我运行它时,会出现一个错误:
此创建/更改数据库中需要文件选项FILENAME
声明
那么,有什么方法可以实现我想要实现的目标吗?试试这个
string strSql = " DECLARE @data_path nvarchar(256); "+
"SET @data_path = (SELECT SUBSTRING(physical_name, 1, CHARINDEX(N'master.mdf', LOWER(physical_name)) - 1)"+
" FROM master.sys.master_files"+
" WHERE database_id = 1 AND file_id = 1);"+
"EXECUTE ('CREATE DATABASE " + strDataBaseName +
"ON PRIMARY "+
"("+
" NAME = FileStreamDB_data "+
" ,FILENAME = ''' + @data_path + '" + strDataBaseName +"_data.mdf''"+
" ,SIZE = 10MB"+
" ,MAXSIZE = 50MB"+
" ,FILEGROWTH = 15%"+
" )LOG ON ("+
" NAME = FileStreamDB_log"+
" ,FILENAME = ''' + @data_path + '" + strDataBaseName + "_log.ldf''" +
" ,SIZE = 5MB, "+
" FILEGROWTH = 20%)"+
" COLLATE SQL_Latin1_General_CP1_CI_AS')";
根据@sahalMoidu的建议,这里有一个稍微更新的SQL版本:
DECLARE @dbFileName nvarchar(256);
CREATE DATABASE [testdb2] COLLATE SQL_Latin1_General_CP1_CI_AS;
SET @dbFileName = (SELECT [name] FROM master.sys.master_files WHERE [database_id] = DB_ID(N'testdb2') AND file_id = 1);
EXECUTE ('ALTER DATABASE [testdb2]
MODIFY FILE(
NAME = ''' + @dbFileName + ''',
SIZE = 5MB,
MAXSIZE = UNLIMITED,
FILEGROWTH = 20%
);
谢谢这很有效。我看到您获取了第一个可用数据库的路径,并使用它来构建我的新数据库路径。我很好奇,id=1的DB总是
master.mdf
?这对远程SQL Server有效吗?是的。应该有效,因为没有主数据库的SQL Server实例是不存在的,并且SQL Server首先创建主数据库,因此数据库的id应为1。注意,您可以从服务器属性SERVERPROPERTY('instancedefaultdatapath')和SERVERPROPERTY获取实际的默认路径('instancedefaultlogpath')。这是SSMS在幕后所做的事情-打开“新建数据库”对话框时,请查看SQL Server Profiler。