oracle数组类型简单实例介绍

--固定数组
declare
type type_array is varray(10) of varchar2(20);
var_array type_array:=type_array('ggs','jjh','wsb','csl','dd','bb');
begin
for i in 1..var_array.count loop
dbms_output.put_line(var_array(i));
end loop;
end;

--可变数组
declare
type type_array is table of varchar2(20) index by binary_integer;
var_array type_array;
begin
var_array(1):='aa';
var_array(2):='bb';

for i in 1..var_array.count loop
dbms_output.put_line( var_array(i));
end loop;

end;

--可变数组取表
declare
begin

end;

create or replace procedure proc_stock(n number)
as
var_stock_code varchar2(10);
var_stock_price number;
begin
for i in 1..n loop
var_stock_code:= lpad(STR1 =>i ,LEN =>6 ,PAD =>'0' ) ;

var_stock_price:=trunc(dbms_random.value*100)+1;
--dbms_output.put_line(var_stock_code);
--dbms_output.put_line(var_stock_price);
insert into t_stock (stockcode,stockprice)
values(var_stock_code,var_stock_price);
commit;
end loop;
end;
declare
begin
proc_stock(1000000);
end;
--用游标访问 14.578秒 13.5 13.8
declare
cursor cur is select * from t_stock;
row_stock t_stock%rowtype;
begin
open cur;
loop
fetch cur into row_stock;
exit when cur%notfound;
null;
end loop;
close cur;
end;

--用数组实现 4.813 1.953 2
declare
type type_array is table of t_stock%rowtype index by binary_integer;
var_array type_array;
begin
select * bulk collect into var_array from t_stock;
for i in 1..var_array.count loop
null;
end loop;
end;

--访问自定义表
declare
type type_record is record(
username varchar2(20),
sex varchar2(2)
);
type_record_user type_record;
type type_array is table of type_record_user%type index by binary_integer;
var_array type_array;
begin
select username,sex bulk collect into var_array from tuser;
for i in 1..var_array.count loop
dbms_output.put_line(var_array(i).username);
dbms_output.put_line(var_array(i).sex);
end loop;
end;

*/

set serverout on
DECLARE
TYPE t_record IS RECORD (
id number(18,0),
mc varchar2(50)
);
var_record t_record;
type t_test is table of t_record;
var_test t_test := t_test();
cursor cur_test is select id,mc from test;
begin
open cur_test;
fetch cur_test BULK COLLECT INTO var_test;
for i in 1..var_test.count() loop
dbms_output.put_line(var_test(i).id||'---'||var_test(i).mc);
end loop;
end;