Question

我正在为一家银行设计一个虚构的数据库，我需要编写触发器来记录每个银行分行贷款的贷款总额。这是我的加载文件：

CREATE TABLE a2_bank (
routing_code   VARCHAR(200)  PRIMARY KEY,
name          VARCHAR(200)  NOT NULL,
address       VARCHAR(200)  NOT NULL
);

INSERT INTO a2_bank VALUES
( '123456','ASB', '3 gladstone rd');
INSERT INTO a2_bank VALUES
( '123556','BNZ', '5 gladstone rd');
INSERT INTO a2_bank VALUES
( '12456','KIWIBANK', '3 gladstone rd');


CREATE TABLE a2_bankbranch (
name           VARCHAR(200)  NOT NULL,
branch_num     VARCHAR(200) PRIMARY KEY,
address        VARCHAR(200)  NOT NULL,
routing_code   VARCHAR(200) NOT NULL,
total_loan     NUMBER(38),
FOREIGN KEY(routing_code) REFERENCES a2_bank(routing_code)
);


INSERT INTO a2_bankbranch VALUES
( 'ASB', '5', '3 gladstone rd', '123456', '');
INSERT INTO a2_bankbranch VALUES
( 'ASB', '4', '28 stevee rd', '123456', '');

CREATE TABLE a2_loan (
loan_num       CHAR(10)  PRIMARY KEY,
type           VARCHAR(200)  NOT NULL,
amount         NUMBER(38)  NOT NULL,
contract_date  DATE          NOT NULL,
branch_num     VARCHAR(200) NOT NULL,
routing_code   VARCHAR(200) NOT NULL,
FOREIGN KEY(routing_code) REFERENCES a2_bank(routing_code),
FOREIGN KEY(branch_num) REFERENCES a2_bankbranch(branch_num)
);
@trig.sql
INSERT INTO a2_loan VALUES
( '323', 'Mortgage', '2000000', TO_DATE('11-03-1994', 'DD-MM-YYYY'), '5', '123456' );
INSERT INTO a2_loan VALUES
( '33', 'Car', '2000', TO_DATE('12-08-1994', 'DD-MM-YYYY'), '5', '123456' );
INSERT INTO a2_loan VALUES
( '3243', 'Pesonal', '875', TO_DATE('14-06-1994', 'DD-MM-YYYY'), '5', '123456' );
INSERT INTO a2_loan VALUES
( '6', 'Mortgage', '400500', TO_DATE('11-06-1994', 'DD-MM-YYYY'), '5', '123456'  );

CREATE TABLE a2_account (
acc_num       CHAR(10)  PRIMARY KEY,
type           VARCHAR(20)  NOT NULL,
balance         VARCHAR(10)  NOT NULL
);
INSERT INTO a2_account VALUES
( '2539267332', 'Savings', '20');
INSERT INTO a2_account VALUES
( '8237893378', 'Cash', '300');
INSERT INTO a2_account VALUES
( '2378723936', 'Cheque', '75');
INSERT INTO a2_account VALUES
( '2378723937', 'Savings', '175');


CREATE TABLE a2_customer (
ird_num         CHAR(8)  PRIMARY KEY,
name            VARCHAR(200)  NOT NULL,
address         VARCHAR(200)  NOT NULL,
phone           VARCHAR(20)
);
INSERT INTO a2_customer VALUES
( '25362672',  'Stan Yel', '5 Wanna way', '02010201');
INSERT INTO a2_customer VALUES
( '83783783', 'Cam Birch', '34 Trada st', '02302020202');
INSERT INTO a2_customer VALUES
( '23723367', 'Jeff King', '5 Queens st', '38982383');
INSERT INTO a2_customer VALUES
( '54637822',  'John Smith', '24 Queen st', '38922383');


CREATE TABLE a2_accr (
ird_num                CHAR(8)  NOT NULL ,
account_num            CHAR(10)  NOT NULL,
FOREIGN KEY(ird_num) REFERENCES a2_customer(ird_num),
FOREIGN KEY(account_num) REFERENCES a2_account(acc_num)
);
INSERT INTO a2_accr VALUES
( '25362672', '2539267332');
INSERT INTO a2_accr VALUES
( '83783783', '8237893378');
INSERT INTO a2_accr VALUES
( '83783783', '2378723937');

CREATE TABLE a2_loanr (
ird_num                CHAR(8)  NOT NULL ,
loan_num            CHAR(10)  NOT NULL,
FOREIGN KEY(ird_num) REFERENCES a2_customer(ird_num),
FOREIGN KEY(loan_num) REFERENCES a2_loan(loan_num)
);
INSERT INTO a2_loanr VALUES
( '54637822', '323');
INSERT INTO a2_loanr VALUES
( '23723367', '33');

COMMIT;

这是我的触发器，以达到预期的结果：

-- Create a trigger that will update the total loan amount
--that each bank brach may have

CREATE OR REPLACE TRIGGER ttl
AFTER INSERT, UPDATE, DELETE ON a2_loan
FOR EACH ROW
BEGIN
IF INSERTING 
THEN
UPDATE a2_bankbranch
SET total_loan = nvl(total_loan,0) + :new.amount
WHERE routing_code = :new.routing_code
AND branch_num   = :new.branch_num;
END IF;

IF UPDATING
THEN
UPDATE a2_bankbranch
SET total_loan = nvl(total_loan,0) - :old.amount
WHERE routing_code = :old.routing_code
AND branch_num   = :old.branch_num;

UPDATE a2_bankbranch
SET total_loan = nvl(total_loan,0) + :new.amount
WHERE routing_code = :new.routing_code
AND branch_num   = :new.branch_num;
END IF;

IF DELETING
THEN
UPDATE a2_bankbranch
SET total_loan = nvl(total_loan,0) - :old.amount
WHERE routing_code = :old.routing_code
AND branch_num   = :old.branch_num;
END IF;
END;

目前，当我在Oracle中运行我的load.sql脚本时，它会转到我试图引入我的trig.sql的地方，它只是停止并提供了trig.sql所在的行。有什么建议吗？

Answer 1

可能您正在使用SQL * Plus来运行此脚本在这种情况下，您需要

在trig.sql的末尾（只是新行中的单斜杠）
该符号应该结束脚本中的每个PL / SQL块（过程，函数，包，触发器......）来执行它。

触发器引入

1 个答案: