批处理 动态sql

１. 
DECLARE 
TYPE ref_cursor_type IS ref CURSOR; 
v_mycursor ref_cursor_type; 
TYPE id_list IS TABLE OF integer; 
TYPE name_list IS TABLE OF varchar2(30); 
v_tabid id_list:=id_list(); 
v_tabname name_list:=name_list(); 
sql_str varchar2(200); 
BEGIN 
--查询所以行,放在集合里 
sql_str:='select empno,ename from emp'; 
sql_str:=sql_str||' order by empno desc'; 
execute immediate sql_str BULK COLLECT INTO v_tabid,v_tabname; 
FOR c IN v_tabid.first..v_tabid.last LOOP 
dbms_output.put_line('empno为'||v_tabid(c)||' 记录的NAME为'||v_tabname(c)); 
END LOOP; 
dbms_output.put_line('---------------------------------'); 
--更新(返回更新后的值) 
sql_str:='update emp set empno=1+empno,ename=''a'' where rownum=1 RETURNING empno,ename into :1,:2 '; 
execute immediate sql_str RETURNING BULK COLLECT INTO v_tabid, v_tabname; 
FOR c IN v_tabid.first..v_tabid.last LOOP 
dbms_output.put_line('empno为'||v_tabid(c)||' 记录的NAME为'||v_tabname(c)); 
END LOOP; 
dbms_output.put_line('---------------------------------'); 
--删除(返回被删除的行) 
sql_str:='delete from emp where rownum<=2 RETURNING empno,ename into :1,:2 '; 
execute immediate sql_str RETURNING BULK COLLECT INTO v_tabid, v_tabname; 
FOR c IN v_tabid.first..v_tabid.last LOOP 
dbms_output.put_line('empno为'||v_tabid(c)||' 记录的NAME为'||v_tabname(c)); 
END LOOP; 
dbms_output.put_line('---------------------------------'); 
--插入(返回插入的行) 
sql_str:='insert into emp(empno,ename) values(1,''abc'') RETURNING empno,ename into :1,:2 '; 
execute immediate sql_str RETURNING BULK COLLECT INTO v_tabid, v_tabname; 
FOR c IN v_tabid.first..v_tabid.last LOOP 
dbms_output.put_line('empno为'||v_tabid(c)||' 记录的NAME为'||v_tabname(c)); 
END LOOP; 
dbms_output.put_line('---------------------------------'); 
/* 批fetch 
语法: 
fetch dynamic_cursor 
bulk collect into define_variable[,define_variable...] 
*/ 
sql_str:='select empno,ename from emp'; 
sql_str:=sql_str||' order by empno desc'; 
OPEN v_mycursor FOR sql_str; 
--取 
FETCH v_mycursor BULK COLLECT INTO v_tabid,v_tabname; 
--关 
CLOSE v_mycursor; 
--输 
FOR c IN v_tabid.first..v_tabid.last LOOP 
dbms_output.put_line('empno为'||v_tabid(c)||' 记录的NAME为'||v_tabname(c)); 
END LOOP; 
dbms_output.put_line('---------------------------------'); 
END; 
２.－－－－－－－ 
forall 
DECLARE 
/*批forall 
语法：动态字符串必须为insert/update/delete,不能为select 
forall index in lower..upper 
execute immediate dynamic_string 
using bind |bind(index)[,bind |bind(index)...] 
[{returning|return} bulk collect into bind_argument[,bind_argument...]]; 
*/ 
TYPE sal_list IS TABLE OF number(8,2); 
TYPE name_list IS TABLE OF varchar2(30); 
TYPE dept_list IS VARRAY(15) OF integer; 
v_depts dept_list:=dept_list(10,20,30,40,50,60,70,80); 
v_tabsal sal_list:=sal_list(); 
v_tabname name_list:=name_list(); 
sql_str varchar2(200); 
BEGIN 
sql_str:='update emp set sal=sal*:arg1 where DEPTNO=:arg2'; 
sql_str:=sql_str||' returning ename,sal into :arg3,:arg4'; 
--给前面4个部门加薪1０％，并返回结果到集合. 
FORALL j IN 1..4 
execute immediate sql_str 
using 1.10,v_depts(j) 
RETURNING BULK COLLECT INTO v_tabname,v_tabsal; 
--显示结果 
FOR j IN v_tabname.first..v_tabname.last LOOP 
dbms_output.put_line('雇员'||v_tabname(j) 
||'　的薪水被提到'||v_tabsal(j)); 
END LOOP; 
dbms_output.put_line('---------------------------------'); 
--给后面4个部门加薪２０％，并返回结果到集合. 
FORALL j IN 5..8 
execute immediate sql_str 
using 1.20,v_depts(j) 
RETURNING BULK COLLECT INTO v_tabname,v_tabsal; 
--显示结果(用notfound判断是否有结果集） 
IF SQL%NOTFOUND THEN 
dbms_output.put_line('无数据更新'); 
ELSE 
FOR j IN v_tabname.first..v_tabname.last LOOP 
dbms_output.put_line('雇员'||v_tabname(j) 
||'　的薪水被提到'||v_tabsal(j)); 
END LOOP; 
END IF; 
END; 
３.用一个值绑定绑定名称相同的值. 
把sql语句用begin end括起来就能实现 
如: 
execute immediate 'begin calc_stats(:x,:x,:y,:x,:y); end;' using a,b; 
将Ａ与Ｘ绑定，当第二次出来不同名称时，与Ｂ绑定，以此类推