當控制權從所呼叫的預存程序傳回時,@@FETCH_STATUS 會反映預存程序中所執行的最後一個 FETCH,而不是在呼叫預存程序之前執行的 FETCH 陳述式。 若要擷取特定資料指標的最後一個擷取狀態,請查詢 sys.dm_exec_cursors 動態管理函式的 fetch_status 資料行。 範例 此範例使用 @@FETCH_STATUS 控制WHILE 迴圈中的...
@@FETCH_STATUS in nested loops @@ServerName returns wrong value in SQL SERVER 2008 ##TempTable and INSERT-SELECT FROM an existing Table with an IDENTITY column %rowtype equivalent in SQL server ++ operator in TSQL - bug or feature? 2 tables referencing each other using foreign key.is it ...
FETCH OPEN UPDATE SET These system functions and system stored procedures also support cursors: @@CURSOR_ROWS CURSOR_STATUS @@FETCH_STATUS sp_cursor_list sp_describe_cursor sp_describe_cursor_columns sp_describe_cursor_tables See Also CursorsFeed...
SQL Server2014其他版本1(共1)对本文的评价是有帮助-评价此主题 将有序分区中的行分发到指定数目的组中。 各个组有编号,编号从一开始。 对于每一个行,NTILE 将返回此行所属的组的编号。 适用范围:SQL Server(SQL Server2008至当前版本),Windows Azure SQLDatabase(初始版本至当前版本)。 Transact-SQL 语法约定...
SQL_ROW_NOROWThe rowset overlapped the end of the result set, and no row was returned that corresponded to this element of the row status array. [1] For keyset, mixed, and dynamic cursors, if a key value is updated, the row of data is considered to have been deleted and a new row...
FETCH NEXT is the only fetch available because the SCROLL option isn't specified. SQL Copy DECLARE vend_cursor CURSOR FOR SELECT * FROM Purchasing.Vendor OPEN vend_cursor FETCH NEXT FROM vend_cursor; B. Use nested cursors to produce report output The following example shows how cursors can...
简介:原文: SQL Server 2008性能故障排查(二)——CPU 承接上一篇:SQL Server 2008性能故障排查(一)——概论 说明一下,CSDN的博客编辑非常不人性化,我在word里面都排好了版,贴上来就乱得不成样了。 原文:SQL Server 2008性能故障排查(二)——CPU
his might not be a perfect example because the nested cursor is magnifying the slow performance. However, the bottom line is; aviod cursors if possible and use joins / set operations whenever you can. Cross Posted from https://blogs.microsoft.com/mssqlisv Comments ...
This prevents a situation where the server is waiting for the client to read all the rows it has sent. Thus, the server is ready to accept a new request on that connection. Applications that open cursors and fetch one row (or a small number of rows) at a time can easily become ...
The blocks can't be nested. For more information about atomic blocks, see Natively Compiled Stored Procedures.NULL | NOT NULLDetermines whether null values are allowed in a parameter. NULL is the default.NATIVE_COMPILATIONApplies to: SQL Server 2014 (12.x) and later, and Azure SQL Database....