我正在尝试收集member_id以及该人租了多少本不同的书。然后,我希望将此数据放入变量中,以便以后使用。我正在尝试这样做
DECLARE
nr_imprumuturi RECORD%ROWTYPE;
nr_total_titluri Number(4);
procent Number(3);
BEGIN
select count(*) into nr_total_titluri
from title;
select count(distinct r.title_id),r.member_id bulk collect into nr_imprumuturi
from member m, rental r
group by r.member_id;
select nr_imprumuturi.Nr_impr/nr_total_titluri *100 into procent
from dual;
END;
/
我希望将数据放入nr_imprumuturi,但出现此错误:
Error report:
ORA-06550: line 11, column 67:
PLS-00497: cannot mix between single row and multi-row (BULK) in INTO list
ORA-06550: line 12, column 3:
PL/SQL: ORA-00904: : invalid identifier
ORA-06550: line 11, column 3:
PL/SQL: SQL Statement ignored
06550. 00000 - "line %s, column %s:\n%s"
*Cause: Usually a PL/SQL compilation error.
*Action:
该表记录如下所示:
create table record(
nr_impr Number(3),
member_id Number(3),
procent Number(3)
)
可能您需要嵌套表。这是个小例子:
set serveroutput on;
create table test (id number, str varchar2(100));
insert into test values(1, 'a');
insert into test values(2, 'b');
insert into test values(3, 'c');
insert into test values(4, 'd');
declare
type test_table is table of test%rowtype index by binary_integer;
a_table test_table;
begin
select *
bulk collect into a_table
from test
where id > 1;
dbms_output.put_line('Collection size is ' || a_table.count());
end;
/
drop table test;
您可以在不同的SQL语句中使用此类型,有关详细信息,请参阅文档:http : //docs.oracle.com/cd/E11882_01/appdev.112/e25519/composites.htm#LNPLS99981
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