Dynamic SQL Using OPEN FOR in Oracle PL/SQL 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_...
```sql DECLARE cursor_name CURSOR DYNAMIC FOR SELECT * FROM employee ORDER BY salary DESC; BEGIN OPEN cursor_name; loop FETCH cursor_name INTO var_employee; -- 处理查询结果,如打印员工信息 PRINT var_employee; EXIT WHEN cursor_name%NOTFOUND; END LOOP; CLOSE cursor_name; END; / ``` 5....
DECLAREl_sql_cursorPLS_INTEGER;l_ref_cursorSYS_REFCURSOR;l_returnPLS_INTEGER;l_col_cntPLS_INTEGER;l_desc_tabDBMS_SQL.desc_tab;l_countNUMBER;l_EMPLOYEE_IDEMPLOYEES.EMPLOYEE_ID%TYPE;l_FIRST_NAMEEMPLOYEES.FIRST_NAME%TYPE;l_LAST_NAMEEMPLOYEES.LAST_NAME%TYPE;BEGIN-- 执行过程l_sql_cursor:=DBMS_...
3.Dyamic cursors in PL/SQL create or replace package dynamic_cursor is type t_crs isref cursor; procedure dyn_sel ( tab_name in varchar2, field_name in varchar2, val in varchar2, crs in out t_crs); procedure openCursor; end dynamic_cursor; / create or replace package body dynamic_...
动态SQL语句处理:根据要处理的sql语句的作用不同,可以使用三种不同类型的动态sql方法:使用execute immediate语句可以处理包括ddl(create、alter和drop)、DCL(grant、revoke)、DML(insert、update、delete)以及单行select语句;使用open cursorname for sql_statement语句可以处理多行查询操作;使用批量动态sql(forall)可以加快...
v_cursor := dbms_sql.open_cursor; --打开游标; dbms_sql.parse(v_cursor, v_sql, dbms_sql.native); --解析动态SQL语句; dbms_sql.bind_variable(v_cursor, ':sid', s_id); --绑定输入参数; dbms_sql.bind_variable(v_cursor, ':sdate', s_date); ...
This method lets your program accept or build a dynamic query, then process it using the PREPARE command with the DECLARE, OPEN, FETCH, and CLOSE cursor commands. The number of select-list items, the number of placeholders for input host variables, and the datatypes of the input host ...
1)、概述 在原来的open-for,fetch,close语句处理动态多行查询语句时,默认每次提取单行数据,循环提取。 通过在fetch语句中引入bulk子句,可以一次提取所有数据。 2)、语法 fetch dynamic_cursor bulk collect into define_name[,define_name…]; 3)、处理多行查询语句 declare type empcurtyp is ref cursor; emp_...
v_sql := 'SELECT id,qan_no,sample_date FROM "tblno" WHERE id >:sidand sample_date <:sdate'; v_cursor := dbms_sql.open_cursor;--打开游标; dbms_sql.parse(v_cursor, v_sql, dbms_sql.native);--解析动态SQL语句; dbms_sql.bind_variable(v_cursor, ':sid', s_id);--绑定输入参数...
dbms_sql.close_cursor(v_cursor);--关闭游标。 END; 结果: 3095;S051013XW00010;15-10月-05 3112;A051013XW00027;10-10月-05 3113;A051013XW00028;13-10月-05 3116;S051013XW00031;13-10月-05 Oracle DBMS_SQL Version 10.2 General Note:DMBS_SQL is the traditional form of dynamic SQL in Or...