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_
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。
SQL Server Azure SQL 数据库 Azure SQL 托管实例 Microsoft Fabric SQL 数据库 定义了 Transact-SQL 服务器游标的属性,例如游标的滚动行为和用于生成游标所操作的结果集的查询。DECLARE CURSOR既接受基于 ISO 标准的语法,也接受使用一组 Transact-SQL 扩展的语法。
在SQL Server中,可以使用DECLARE CURSOR语句来定义一个CURSOR,并使用FETCH语句来逐行检索数据。 CURSOR的使用场景 逐行处理数据:当需要对结果集中的每一行数据进行特殊处理时,可以使用CURSOR。例如,根据每行数据的特定条件执行不同的操作。 批量处理:在处理大量数据时,有时需要将数据分成较小的批次进行处理。CURSOR可以帮...
declare test_cursor cursor local scroll dynamic optimistic for select S_Id,S_StuNo,S_Name,S_Sex,S_Height from Student where C_S_Id='2' 打开游标: -- 打开游标语法 open [ Global ] cursor_name | cursor_variable_name cursor_name:定义的游标名称。
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.
SQL Server Azure SQL Database Azure SQL Managed Instance SQL database in Microsoft Fabric 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.DECLARE CURSORaccepts both a syntax based on...
DECLARE CURSOR 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. The OPEN statement populates the result set, and FETCH returns a row from the result set. The CLOSE statement...
SQL Server Azure SQL Database Azure SQL Managed Instance SQL database in Microsoft Fabric 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.DECLARE CURSORaccepts both a syntax based on...
SQL Server Azure SQL Database Azure SQL Managed Instance SQL database in Microsoft Fabric 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.DECLARE CURSORaccepts both a syntax based on...