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...
Microsoft Fabric 中的 SQL Server Azure SQL 資料庫 Azure SQL 受控執行個體 SQL 資料庫 定義Transact-SQL 伺服器資料指標的屬性,例如立資料指標運作時的捲動行為以及用以建立結果集的查詢。DECLARE CURSOR可接受採用 ISO 標準以及使用 Transact-SQL 延伸模組的語法。
学习使用MS SQL Server游标(CURSOR) 说实的,使用MS SQL Server这样久,游标一直没有使用过。以前实现相似的功能,都是使用WHILE循环加临时表来实现。刚才有参考网上示例练习写了一下。了解到游标概念与语法。 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SELE...
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...
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.
Integer value = 1005. Application has to change data or see changed data for existing rows. This option is the SQL Server-specific synonym for the JDBC TYPE_SCROLL_SENSITIVE and has the same concurrency setting behavior. Rows are retrieved from the server in blocks that are specified by the ...
syntaxsql 复制 sp_cursor_list [ @cursor_return = ] cursor_return OUTPUT , [ @cursor_scope = ] cursor_scope [ ; ] 参数[ @cursor_return = ] cursor_return OUTPUT声明的游标变量的名称。 @cursor_return是 CURSOR 类型的 OUTPUT 参数。 游标是可滚动的动态只读游标。
In This Section See Also Choosing the correct cursor options is an important part of developing a Microsoft SQL Server application. Using block cursors can reduce the number of network roundtrips between the client and SQL Server, thereby improving performance. SQL Server may implicitly convert a cu...
In Microsoft SQL Server 2005, 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....
These are the four ODBC cursor types supported by SQL Server: Forward-only cursors do not support scrolling; they only support fetching rows serially from the start to the end of the cursor. Static cursors are built intempdbwhen the cursor is opened. They always display the result set as it...