List of column names to select from SQL table (only used when reading a table). chunksize : int, default None If specified, return an iterator where `chunksize` is the number of rows to include in each chunk. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 1...
Executing a query that, by its nature, does not return rows (such as a DELETE query), sets FieldCount to 0. However. this should not be confused with a query that returns 0 rows (such as SELECT * FROM WHERE 1 = 2) in which case FieldCount returns the number of columns in the ta...
Provides a way of reading a forward-only stream of rows from a SQL Server database. This class cannot be inherited.
Provides a way of reading a forward-only stream of rows from a SQL Server database. This class cannot be inherited.
many places without issue. However in this one case it is causing the error. I confirmed in the method GetDataReader the reader has the row I am expecting. However in the method MaximumFieldLengthSql where it is returned to, there are no rows in the Results View and the erro...
ADO.NET 2.的一个新特征多数据结果集（Multiple Active Result Sets，简称MARS）-它允许在单个连接上...
Gets the number of columns in the current row.VB 复制 Public Overridable ReadOnly Property FieldCount As Integer _ Implements IDataRecord.FieldCount [C#] public virtual int FieldCount {get;} [C++] public: __property virtual int get_FieldCount(); [JScript] public function get FieldCount() : ...
在结果就能看到数据库所有表的结构，这个时候只要全选，然后右击出来属性框，选择将结果另存为，这个时候...
When loading a table of about 150 000 rows (about 10 columns) from sql server I get about 300 sec time! Smaller tables also loaded in such a big time (proportionally to the number of rows). All requests are sync (async versions never used). ...
client. The only packet sent from the client computer to the server is the original packet with the statement to execute. When the results are sent back to the client, SQL Server puts as many result set rows as it can into each packet, minimizing the number of packets sent to the ...