SQLSERVER-获取表名和字段名

SQL SERVER

查看所有表名：
select name from sysobjects where type='U'

查询表的所有字段名：
Select name from syscolumns Where ID=OBJECT_ID('表名')

ACCESS

/// <summary>
    /// 取所有表名
    /// </summary>
    /// <returns></returns>
    public List<string> GetTableNameList()
    { 
        List<string> list = new List<string>();
        OleDbConnection Conn = new OleDbConnection(ConnStr);
        try
        {
            if (Conn.State == ConnectionState.Closed)
                Conn.Open();
            DataTable dt = Conn.GetSchema("Tables");
            foreach (DataRow row in dt.Rows)
            {
                if (row[3].ToString() == "TABLE")
                    list.Add(row[2].ToString());
            }
            return list;
        }
        catch (Exception e)
        { throw e; }
        finally { if (Conn.State == ConnectionState.Open) Conn.Close(); Conn.Dispose(); }
    }
 
    /// <summary>
    /// 取指定表所有字段名称
    /// </summary>
    /// <returns></returns>
    public List<string> GetTableFieldNameList(string TableName)
    {
        List<string> list = new List<string>();
        OleDbConnection Conn = new OleDbConnection(ConnStr);
        try
        {
            if (Conn.State == ConnectionState.Closed)
                Conn.Open();
            using (OleDbCommand cmd = new OleDbCommand())
            {
                cmd.CommandText = "SELECT TOP 1 * FROM [" + TableName + "]";
                cmd.Connection = Conn;
                OleDbDataReader dr = cmd.ExecuteReader();
                for (int i = 0; i < dr.FieldCount; i++)
                {
                    list.Add(dr.GetName(i));
                }
            }
            return list;
        }
        catch (Exception e)
        { throw e; }
        finally
        {
            if (Conn.State == ConnectionState.Open)
                Conn.Close();
            Conn.Dispose();
        }
    }

 

Oracle
select cname from col where tname='ZW_YINGYEZ'

select column_name from user_tab_columns where table_name='ZW_YINGYEZ'

查询表字段数
select count(column_name) from user_tab_columns where table_name='表名';