MS SQL Server游标(CURSOR)的学习使用 下面代码示例中, 先是宣告你在游标中需使用变量,也就是临时存储处理字段的数据。 2. 宣告一个游标,并SELECT需要处理的数据集。 3. 打开游标(#6行代码)。 4. 从游标中拿来FETCH NEXT 数据给变量赋值。 5. 循环@@FETCH_STATUS = 0条件。 6. 在循环块,可以处理第一笔...
QQ群:2863140 My QQ:89447727 --备份的时候,sql2005 有一个小bug,备份不能放跟目录 backupdatabaseStuDBtodisk='c:\backup\StuDb.bak' restoredatabaseStuDBfromdisk='c:\backup\StuDb.bak' --还原的时候,有时数据库正在使用,所以要先把这些使用这个数据库的进程结束 declare@spidint --声明游标 declaregetS...
MS SQL SERVER 支持三种类型的游标:Transact_SQL 游标,API服务器游标和客户游标。 (1)Transact_SQL 游标 Transact_SQL 游标是由DECLARE CURSOR 语法定义、主要用在Transact_SQL脚本、存储过程和触发器中。Transact_SQL 游标主要用在服务器上,由从客户端发送给服务器的Transact_SQL 语句或是批处理、存储过程、触发器...
cursor (Transact-SQL) 參考資料指標的變數或預存程序 OUTPUT 參數的資料類型。利用 cursor 資料類型來建立的任何變數都可為 Null 值。 以下是可參考擁有cursor資料類型的變數和參數的作業: DECLARE@local_variable和 SET@local_variable陳述式。 OPEN、FETCH、CLOSE 和 DEALLOCATE 資料指標陳述式。 預存程序輸出參數。
为了提高性能, SQL Server可以异步填充大型键集和静态游标。可调用@@CURSOR_ROWS以确定当@@CURSOR_ROWS被调用时检索了游标符合条件的行数。语法【SELECT @@CURSOR_ROWS】,其中返回类型为integer数据类型。其返回值有四种如下图。 如果异步打开最后一个游标,@@CURSOR_ROWS 返回负数。 如果 sp_configure cursor ...
In Microsoft SQL Server, the SELECT statement in a cursor definition is subject to the same transaction locking rules that apply to any other SELECT statement. In cursors, however, an additional set of scroll locks can be acquired based on the specification of a cursor concurrency level. The ...
1) Implicit Cursor Conversions have been largely eliminated in SQL Server 2005. For the most part, applications will now get the cursor type that they requested. There are still a very small number of cases where cursors will be converted, and they are documented in SQL Server 200...
(Inherited from TSqlFragment) Properties Expandir tabela FirstTokenIndex Gets or sets the first index of the token. (Inherited from TSqlFragment) FragmentLength Defines the number of characters the fragment takes up in the script it was parsed. (Inherited from TSqlFragment) IsGlobal ...
Defines the attributes of a Transact-SQL server cursor, such as its scrolling behavior and the query used to build the result set on which the cursor operates.
Supporting data modifications to the row at the current position in the result set. Supporting different levels of visibility to changes made to the database data by other users that is presented in the result set. Note For a full description of the SQL Server cursor types, see Type of Cur...