Sql 匿名块游标,包括group by和for update
我有一张表,上面有以下描述:Sql 匿名块游标,包括group by和for update,sql,oracle,plsql,cursor,ora-06512,Sql,Oracle,Plsql,Cursor,Ora 06512,我有一张表,上面有以下描述: desc products; Name Null? Type ---------------------- -------- -------------- PID NOT NULL CHAR(4) PNAME VARCHAR2(15) PRICE NUMBER(6,2) DISCN
desc products;
Name Null? Type
---------------------- -------- --------------
PID NOT NULL CHAR(4)
PNAME VARCHAR2(15)
PRICE NUMBER(6,2)
DISCNT_RATE NUMBER(3,2)
我的游标语句如下所示:
declare
cursor c5 is
select pid, pname, price
from products
c5_rec c5%rowtype
group by price for update;
begin
for c5_rec in c5
loop
if(c5_rec.price > 100) then
delete from products where current of c5;
end if;
end loop;
end;
/
当我在第4行和第5行中未包含group by和rowtype时,会出现错误:
integrity constraint (MYID.SYS_C0012393) violated - child record found ORA06512: at line 7
我试图做的是编写一个
PL/SQL
匿名块,其中包含一个游标,该游标具有GROUPBY
子句,然后在execute部分对游标的结果表执行update/delete。在哪里可以添加GROUPBY子句?哪里出错了?选择光标中的所有列,因为“c5_rec”的数据类型与表中的列数和列数据类型相同
cursor c5 is
select pid, pname, price, discnt_rate from products
或者,您可以将“c5_rec”数据类型更改为与价格列相同
cursor c5 is
select price from products group by price;
c5_rec c5%products.price%TYPE;
您也可以这样做,当您需要多个列但不是所有列时,它是灵活的
declare
--cursor c5 is
--select pid, pname, price from products
--c5_rec c5%rowtype
--group by price for update;
begin
for c5_rec in (select price from products group by price)
loop
if(c5_rec.price > 100) then
delete from products
where price = c5_rec.price;
end if;
end loop;
end;
我尝试了它,但遇到了以下错误之一时遇到了符号“GROUP”:begin function pragma procedure subtype type@Suttipong.PDid您删除了“GROUP by price for update;”行?1) 它应该在“选择pid、pname、产品价格”之后,不应该在“c5_rec c5%行类型”之后。2) 不能将“for update”与select语句一起使用。你能试试我上次的节目吗?