批處理 動態(tài)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
–查詢所以行,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為’||v_tabid(c)||’ 記錄的NAME為’||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為’||v_tabid(c)||’ 記錄的NAME為’||v_tabname(c));
END LOOP;
dbms_output.put_line(‘———————————‘);
–刪除(返回被刪除的行)
sql_str:=’delete from emp where rownumexecute 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為’||v_tabid(c)||’ 記錄的NAME為’||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為’||v_tabid(c)||’ 記錄的NAME為’||v_tabname(c));
END LOOP;
dbms_output.put_line(‘———————————‘);
/* 批fetch
語法:
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;
–關(guān)
CLOSE v_mycursor;
–輸
FOR c IN v_tabid.first..v_tabid.last LOOP
dbms_output.put_line(’empno為’||v_tabid(c)||’ 記錄的NAME為’||v_tabname(c));
END LOOP;
dbms_output.put_line(‘———————————‘);
END;
２.－－－－－－－
forall
DECLARE
/*批forall
語法：動態(tài)字符串必須為insert/update/delete,不能為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′;
–給前面4個部門加薪1０％，并返回結(jié)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;
–顯示結(jié)果
FOR j IN v_tabname.first..v_tabname.last LOOP
dbms_output.put_line(‘雇員’||v_tabname(j)
||’ 的薪水被提到’||v_tabsal(j));
END LOOP;
dbms_output.put_line(‘———————————‘);
–給后面4個部門加薪２０％，并返回結(jié)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;
–顯示結(jié)果(用notfound判斷是否有結(jié)果集）
IF SQL%NOTFOUND THEN
dbms_output.put_line(‘無數(shù)據(jù)更新’);
ELSE
FOR j IN v_tabname.first..v_tabname.last LOOP
dbms_output.put_line(‘雇員’||v_tabname(j)
||’ 的薪水被提到’||v_tabsal(j));
END LOOP;
END IF;
END;
３.用一個值綁定綁定名稱相同的值.
把sql語句用begin end括起來就能實現(xiàn)
如:
execute immediate ‘begin calc_stats(:x,:x,:y,:x,:y); end;’ using a,b;
將Ａ與Ｘ綁定，當(dāng)?shù)诙纬鰜聿煌Q時，與Ｂ綁定，以此類推
