三、DECLARE CURSOR WITH PARAMETER USE FOR..LOOP DECLARE CURSOR cur_para(id varchar2) IS SELECT books_name FROM books WHERE books_id=id; BEGIN DBMS_OUTPUT.PUT_LINE('***'); FOR cur IN cur_para('0001') LOOP --FOR LOOP, NO NEED TO DECLARE THE cur. DBMS_OUTPUT.PUT_LINE(cur.books_n...
此外,另一种使用FOR LOOP的Implicit Cursor使用方法。 Every time you run either a SQLDML statement or a PL/SQLSELECTINTOstatement, PL/SQL opens animplicit cursor. You can get information about this cursor from its attributes, but you cannot control it. After the statement runs, the database cl...
此外,另一种使用FOR LOOP的Implicit Cursor使用方法。 Every time you run either a SQL DML statement or a PL/SQLSELECTINTO statement, PL/SQL opens animplicit cursor. You can get information about this cursor from its attributes, but you cannot control it. After the...
问oracle open cursor with字符串变量出现错误EN我在使用字符串变量打开游标时遇到问题介绍oracle cursor(...
Example 1: Cursor For Loop With Simple Explicit Cursor SET SERVEROUTPUT ON; DECLARE CURSOR cur_RebellionRider IS SELECT first_name, last_name FROM employees WHERE employee_id >200; BEGIN FOR L_IDX IN cur_RebellionRider LOOP DBMS_OUTPUT.PUT_LINE(L_IDX.first_name||' '||L_IDX.last_name)...
2.CURSOR FOR LOOP,用于for in loop语句for 游标变量 in 游标 loop end loop;用于静态游标中,不能用于动态游标,且不需要显示的打开、关闭、取数据、测试数据的存在、定义数据的变量等等。举例: 游标FOR循环,简化游标操作my_dept_rec不需要声明 declare
( _ "EMPCURSOR", OracleType.Cursor)).Direction = _ ParameterDirection.Output cmd.Parameters.Add(New OracleParameter(_ "DEPTCURSOR", OracleType.Cursor)).Direction = _ ParameterDirection.Output rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection) While (rdr.Read()) REM do something with the ...
根据High Version Counts For SQL Statements (>1024) Post Upgrade To 12.2 and Above Causing Database Slow Performance (Doc ID 2431353.1) 的建议,修改隐含参数"_cursor_obsolete_threshold"为1024,并重启数据库。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 alter system set "_cursor_obsolete_thresh...
CURSOR cursor_name [(parameter[, parameter]...)][RETURN return_type] IS select_statement; wherereturn_typemust represent a record or a row in a database table, andparameterstands for the following syntax: cursor_parameter_name [IN] datatype [{:= | DEFAULT} expression] ...
OracleParameter.Value 屬性 參考 意見反應 定義 命名空間: System.Data.OracleClient 組件: System.Data.OracleClient.dll 取得或設定參數的值。 C# 複製 [System.ComponentModel.TypeConverter(typeof(System.ComponentModel.StringConverter))] public override object Value { get; set; } 屬性值 Object 物件...