我正在尝试在称为“约会”的其他表中插入一个表后，遍历一个名为Broker的表，并更新我拥有的Broker表上的值。当我尝试创建触发器时，它会显示一条错误消息，“触发了编译错误”
CREATE OR REPLACE TRIGGER broker_level_trigger
AFTER INSERT ON appointment
DECLARE
counter integer := 1;
BEGIN
for o in (SELECT * FROM broker)
loop
SELECT COUNT(appointment.broker_id) INTO app_number FROM appointment INNER JOIN broker ON broker.broker_id = appointment.broker_id WHERE broker.broker_id = counter;
IF app_number > 15 THEN
UPDATE broker SET broker_level = 'gold' WHERE broker_id = counter;
counter := counter + 1;
end loop;
end;
/
broker表中有一个名为broker_level的字段，它会根据约会进行更改，如果约会上的broker_id字段超过15个，我希望它进行更改
答案 0 :(得分：2)
/*Add Product*/
app.post('/save', function (req, res) {
console.log(req.body);
for(let i=0; i<req.body.product; i++) {
let sql = "insert into products values(null, '" + req.body.product + "')";
res.status(204).send();
connection.query(sql,[i], function (err) {
if (err) throw err;
});
connection.end();
}
});
是一件很棒的事情。 （我创建了您使用的虚拟表）。
show err如果仔细看，您会发现SQL> CREATE OR REPLACE TRIGGER broker_level_trigger
2 AFTER INSERT ON appointment
3 DECLARE
4 counter integer := 1;
5 BEGIN
6 for o in (SELECT * FROM broker)
7 loop
8 SELECT COUNT(appointment.broker_id)
9 INTO app_number
10 FROM appointment INNER JOIN broker
11 ON broker.broker_id = appointment.broker_id
12 WHERE broker.broker_id = counter;
13
14 IF app_number > 15 THEN
15 UPDATE broker SET
16 broker_level = 'gold'
17 WHERE broker_id = counter;
18 counter := counter + 1;
19
20 end loop;
21 end;
22 /
Warning: Trigger created with compilation errors.
SQL> show err
Errors for TRIGGER BROKER_LEVEL_TRIGGER:
LINE/COL ERROR
-------- -----------------------------------------------------------------
18/7 PLS-00103: Encountered the symbol "LOOP" when expecting one of
the following:
if
错过了其IF。让我们添加它：
END IF SQL> CREATE OR REPLACE TRIGGER broker_level_trigger
2 AFTER INSERT ON appointment
3 DECLARE
4 counter integer := 1;
5 BEGIN
6 for o in (SELECT * FROM broker)
7 loop
8 SELECT COUNT(appointment.broker_id)
9 INTO app_number
10 FROM appointment INNER JOIN broker
11 ON broker.broker_id = appointment.broker_id
12 WHERE broker.broker_id = counter;
13
14 IF app_number > 15 THEN
15 UPDATE broker SET
16 broker_level = 'gold'
17 WHERE broker_id = counter;
18 counter := counter + 1;
19 END IF; --> missing
20 end loop;
21 end;
22 /
Warning: Trigger created with compilation errors.
SQL> show err
Errors for TRIGGER BROKER_LEVEL_TRIGGER:
LINE/COL ERROR
-------- -----------------------------------------------------------------
6/5 PL/SQL: SQL Statement ignored
7/12 PLS-00201: identifier 'APP_NUMBER' must be declared
8/7 PL/SQL: ORA-00904: : invalid identifier
12/5 PL/SQL: Statement ignored
12/8 PLS-00201: identifier 'APP_NUMBER' must be declared
现在丢失了；您使用它，但从未声明过它。现在开始吧：
APP_NUMBER就是这样。
如果您不使用SQL * Plus，而是使用其他工具，则始终可以查询SQL> CREATE OR REPLACE TRIGGER broker_level_trigger
2 AFTER INSERT ON appointment
3 DECLARE
4 counter integer := 1;
5 app_number number; --> missing
6 BEGIN
7 for o in (SELECT * FROM broker)
8 loop
9 SELECT COUNT(appointment.broker_id)
10 INTO app_number
11 FROM appointment INNER JOIN broker
12 ON broker.broker_id = appointment.broker_id
13 WHERE broker.broker_id = counter;
14
15 IF app_number > 15 THEN
16 UPDATE broker SET
17 broker_level = 'gold'
18 WHERE broker_id = counter;
19 counter := counter + 1;
20 END IF; --> missing
21 end loop;
22 end;
23 /
Trigger created.
SQL>
：
user_errors