This example illustrates how you can create and use dynamic cursor in Oracle PL/SQL. The example is pretty simple, but I hope you can get the idea and apply it to more complicated cases. DECLARE t_cursorISREF CURSOR; my_cursor t_cursor; v_customer RECORD(customer_id NUMBER(18),amount ...
Dynamically Invoking Subprogram with RECORD Formal Parameter In this example, the dynamic PL/SQL block is an anonymous PL/SQL block that invokes a subprogram that has a formal parameter of the PL/SQL (but not SQL) data type RECORD. The record type is declared in a package specification,...
select * from emp where empNo = p_empno and sal = p_salary; What we are doing is forming the where predicate string dynamically based on user input and using execute immediate to execute above dynamically formed query. I know this dynamic query would be inefficient as each query would be ...
强类型 REF_CURSOR 和 Oracle 9i 之前的弱类型 REF_CURSOR 在包中应该这样定义: create or replace package REFCURSOR_PKG as TYPE WEAK8i_REF_CURSOR IS REF CURSOR; TYPE STRONG_REF_CURSOR IS REF CURSOR RETURN EMP%ROWTYPE; end REFCURSOR_PKG; 返回REF_CURSOR 的 PL/SQL 存储过程的编写示例: /** unt...
REF Cursor as IN parameter String cmdTxt2 = "begin testSP (:1, :2); end;"; // Create the command object for executing cmdTxt1 and cmdTxt2 OracleCommand cmd = new OracleCommand(cmdTxt1, conn); // Bind the Ref cursor to the PL/SQL stored procedure OracleParameter outRefPrm = cmd...
OracleDataReader 中的 REF CURSOR 參數 發行項 2024/10/15 13 位參與者 意見反應 此Visual Basic 範例執行可傳回 REF CURSOR 參數的 PL/SQL 預存程序,並以OracleDataReader讀取該值。 VB複製 PrivateSubButton1_Click(ByValsenderAsObject, _ByValeAsSystem.EventArgs)HandlesButton1.ClickDimconnStringAs...
一. Cursor说明 Oracle里的cursor分为两种:一种是shared cursor,一种是session cursor。 1.1 Shared cursor 说明 sharedcursor就是指缓存在librarycache(SGA下的Shared Pool)里的一种library cache object,说白了就是指缓存在library cache里的sql和匿名pl/sql。 它们是Oracle缓存在librarycache中的几十种librarycache...
此Visual Basic 示例执行一个 PL/SQL 存储过程,返回 REF CURSOR 参数,并将值作为 OracleDataReader 读取。 VB 复制 Private Sub Button1_Click(ByVal sender As Object, _ ByVal e As System.EventArgs) Handles Button1.Click Dim connString As New String("...") Using conn As New OracleConnection(...
13.3.4 使用cursor for隐式游标【示例13-20】cursor for游标中的游标变量,无需显式声明、打开等操作。为了获得表customersnew中city为Philadelphia的信息,可以利用cursor for游标。 13.4 动态(REF)游标 前面所讲的游标都是与一个SQL语句相关联,并且在编译该块的时候此语句己经是可知的,是静态的,而动态游标可以在运...
SQL Server 資料表提示 ROWLOCK, HOLDLOCK ROWLOCK, XLOCK, HOLDLOCK ROWLOCK, HOLDLOCK TABLOCK, HOLDLOCK TABLOCK, XLOCK, HOLDLOCK TABLOCKX, HOLDLOCK 當您在 [模式] 方塊中選取轉換模式時,SSMA 會套用下列設定: 預設/開放式/完整模式:是 針對REF CURSOR OUT 參數轉換 OPEN-FOR 陳述式在 Oracle 中,OPEN .....