监听器问题 在线等 ！！
所需表 INFO_CHANGE_LOG （公司改动日志表）
T_BIZ_CORP_INFO （公司表）
就是当公司表的某一列有变动的时候就自动把这一列存入INFO_CHANGE_LOG表中
帮帮忙啊 大神们 急啊
谢谢！！！！！！！！！！！再谢！！！！！！
[解决办法]
这个貌似使用触发即可.
相关资料参考如下:
- SQL code
1. Create an 'AFTER INSERT' Trigger SQL> -- create demo tableSQL> create table Employee( 2 ID VARCHAR2(4 BYTE) NOT NULL, 3 First_Name VARCHAR2(10 BYTE), 4 Last_Name VARCHAR2(10 BYTE), 5 Start_Date DATE, 6 End_Date DATE, 7 Salary Number(8,2), 8 City VARCHAR2(10 BYTE), 9 Description VARCHAR2(15 BYTE) 10 ) 11 /Table created.SQL>SQL>SQL> -- AFTER INSERT TriggerSQL>SQL>SQL> CREATE OR REPLACE TRIGGER employee_after_insert 2 AFTER INSERT 3 ON employee 4 FOR EACH ROW 5 6 DECLARE 7 v_username varchar2(10); 8 9 BEGIN 10 -- Find username of person performing the INSERT into the table 11 SELECT user INTO v_username 12 FROM dual; 13 14 dbms_output.put_line('By: '||v_username); 15 dbms_output.put_line(':new.id: '||:new.id); 16 dbms_output.put_line(':new.first_name: '||:new.first_name); 17 dbms_output.put_line(':new.last_name: '||:new.last_name); 18 dbms_output.put_line(':old.id: '||:old.id); 19 dbms_output.put_line(':old.first_name: '||:old.first_name); 20 dbms_output.put_line(':old.last_name: '||:old.last_name); 21 END; 22 /Trigger created.SQL>SQL> -- prepare dataSQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description) 2 values ('01','Jason', 'Martin', to_date('19960725','YYYYMMDD'), to_date('20060725','YYYYMMDD'), 1234.56, 'Toronto', 'Programmer') 3 /By: JAVA2S:new.id: 01:new.first_name: Jason:new.last_name: Martin:old.id::old.first_name::old.last_name:1 row created.SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description) 2 values('02','Alison', 'Mathews', to_date('19760321','YYYYMMDD'), to_date('19860221','YYYYMMDD'), 6661.78, 'Vancouver','Tester') 3 /By: JAVA2S:new.id: 02:new.first_name: Alison:new.last_name: Mathews:old.id::old.first_name::old.last_name:1 row created.SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description) 2 values('03','James', 'Smith', to_date('19781212','YYYYMMDD'), to_date('19900315','YYYYMMDD'), 6544.78, 'Vancouver','Tester') 3 /By: JAVA2S:new.id: 03:new.first_name: James:new.last_name: Smith:old.id::old.first_name::old.last_name:1 row created.SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description) 2 values('04','Celia', 'Rice', to_date('19821024','YYYYMMDD'), to_date('19990421','YYYYMMDD'), 2344.78, 'Vancouver','Manager') 3 /By: JAVA2S:new.id: 04:new.first_name: Celia:new.last_name: Rice:old.id::old.first_name::old.last_name:1 row created.SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description) 2 values('05','Robert', 'Black', to_date('19840115','YYYYMMDD'), to_date('19980808','YYYYMMDD'), 2334.78, 'Vancouver','Tester') 3 /By: JAVA2S:new.id: 05:new.first_name: Robert:new.last_name: Black:old.id::old.first_name::old.last_name:1 row created.SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description) 2 values('06','Linda', 'Green', to_date('19870730','YYYYMMDD'), to_date('19960104','YYYYMMDD'), 4322.78,'New York', 'Tester') 3 /By: JAVA2S:new.id: 06:new.first_name: Linda:new.last_name: Green:old.id::old.first_name::old.last_name:1 row created.SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description) 2 values('07','David', 'Larry', to_date('19901231','YYYYMMDD'), to_date('19980212','YYYYMMDD'), 7897.78,'New York', 'Manager') 3 /By: JAVA2S:new.id: 07:new.first_name: David:new.last_name: Larry:old.id::old.first_name::old.last_name:1 row created.SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description) 2 values('08','James', 'Cat', to_date('19960917','YYYYMMDD'), to_date('20020415','YYYYMMDD'), 1232.78,'Vancouver', 'Tester') 3 /By: JAVA2S:new.id: 08:new.first_name: James:new.last_name: Cat:old.id::old.first_name::old.last_name:1 row created.SQL>SQL>SQL>SQL> -- display data in the tableSQL> select * from Employee 2 /ID FIRST_NAME LAST_NAME START_DAT END_DATE SALARY CITY DESCRIPTION---- ---------- ---------- --------- --------- ---------- ---------- ---------------01 Jason Martin 25-JUL-96 25-JUL-06 1234.56 Toronto Programmer02 Alison Mathews 21-MAR-76 21-FEB-86 6661.78 Vancouver Tester03 James Smith 12-DEC-78 15-MAR-90 6544.78 Vancouver Tester04 Celia Rice 24-OCT-82 21-APR-99 2344.78 Vancouver Manager05 Robert Black 15-JAN-84 08-AUG-98 2334.78 Vancouver Tester06 Linda Green 30-JUL-87 04-JAN-96 4322.78 New York Tester07 David Larry 31-DEC-90 12-FEB-98 7897.78 New York Manager08 James Cat 17-SEP-96 15-APR-02 1232.78 Vancouver Tester8 rows selected.SQL>SQL>SQL>SQL> -- clean the tableSQL> drop table Employee 2 /Table dropped.SQL>SQL>
[解决办法]
- SQL code
1. Create an after delete triggerSQL> -- create demo tableSQL> create table Employee( 2 ID VARCHAR2(4 BYTE) NOT NULL, 3 First_Name VARCHAR2(10 BYTE), 4 Last_Name VARCHAR2(10 BYTE), 5 Start_Date DATE, 6 End_Date DATE, 7 Salary Number(8,2), 8 City VARCHAR2(10 BYTE), 9 Description VARCHAR2(15 BYTE) 10 ) 11 /Table created.SQL>SQL> create table employee_audit ( 2 id VARCHAR2(4 BYTE), 3 salary Number(8,2), 4 delete_date Date, 5 deleted_by VARCHAR2(15 BYTE) 6 ) 7 /Table created.SQL>SQL>SQL> -- prepare dataSQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description) 2 values ('01','Jason', 'Martin', to_date('19960725','YYYYMMDD'), to_date('20060725','YYYYMMDD'), 1234.56, 'Toronto', 'Programmer') 3 /1 row created.SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description) 2 values('02','Alison', 'Mathews', to_date('19760321','YYYYMMDD'), to_date('19860221','YYYYMMDD'), 6661.78, 'Vancouver','Tester') 3 /1 row created.SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description) 2 values('03','James', 'Smith', to_date('19781212','YYYYMMDD'), to_date('19900315','YYYYMMDD'), 6544.78, 'Vancouver','Tester') 3 /1 row created.SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description) 2 values('04','Celia', 'Rice', to_date('19821024','YYYYMMDD'), to_date('19990421','YYYYMMDD'), 2344.78, 'Vancouver','Manager') 3 /1 row created.SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description) 2 values('05','Robert', 'Black', to_date('19840115','YYYYMMDD'), to_date('19980808','YYYYMMDD'), 2334.78, 'Vancouver','Tester') 3 /1 row created.SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description) 2 values('06','Linda', 'Green', to_date('19870730','YYYYMMDD'), to_date('19960104','YYYYMMDD'), 4322.78,'New York', 'Tester') 3 /1 row created.SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description) 2 values('07','David', 'Larry', to_date('19901231','YYYYMMDD'), to_date('19980212','YYYYMMDD'), 7897.78,'New York', 'Manager') 3 /1 row created.SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description) 2 values('08','James', 'Cat', to_date('19960917','YYYYMMDD'), to_date('20020415','YYYYMMDD'), 1232.78,'Vancouver', 'Tester') 3 /1 row created.SQL>SQL>SQL>SQL> -- display data in the tableSQL> select * from Employee 2 /ID FIRST_NAME LAST_NAME START_DAT END_DATE SALARY CITY DESCRIPTION---- ---------- ---------- --------- --------- ---------- ---------- ---------------01 Jason Martin 25-JUL-96 25-JUL-06 1234.56 Toronto Programmer02 Alison Mathews 21-MAR-76 21-FEB-86 6661.78 Vancouver Tester03 James Smith 12-DEC-78 15-MAR-90 6544.78 Vancouver Tester04 Celia Rice 24-OCT-82 21-APR-99 2344.78 Vancouver Manager05 Robert Black 15-JAN-84 08-AUG-98 2334.78 Vancouver Tester06 Linda Green 30-JUL-87 04-JAN-96 4322.78 New York Tester07 David Larry 31-DEC-90 12-FEB-98 7897.78 New York Manager08 James Cat 17-SEP-96 15-APR-02 1232.78 Vancouver Tester8 rows selected.SQL>SQL>SQL>SQL>SQL>SQL>SQL> CREATE OR REPLACE TRIGGER employee_after_delete 2 AFTER DELETE 3 ON employee 4 FOR EACH ROW 5 6 DECLARE 7 v_username varchar2(10); 8 9 BEGIN 10 11 -- Find username of person performing the DELETE on the table 12 SELECT user INTO v_username 13 FROM dual; 14 15 -- Insert record into audit table 16 INSERT INTO employee_audit (id, salary, delete_date, deleted_by) 17 VALUES ( :old.id, :old.salary, sysdate, v_username ); 18 19 END; 20 /Trigger created.SQL>SQL> delete from employee;8 rows deleted.SQL>SQL> select * from employee_audit;ID SALARY DELETE_DA DELETED_BY---- ---------- --------- ---------------01 1234.56 09-SEP-06 JAVA2S02 6661.78 09-SEP-06 JAVA2S03 6544.78 09-SEP-06 JAVA2S04 2344.78 09-SEP-06 JAVA2S05 2334.78 09-SEP-06 JAVA2S06 4322.78 09-SEP-06 JAVA2S07 7897.78 09-SEP-06 JAVA2S08 1232.78 09-SEP-06 JAVA2S8 rows selected.SQL>SQL> drop table employee_audit;Table dropped.SQL>SQL>SQL>SQL> -- clean the tableSQL> drop table Employee 2 /Table dropped.SQL>SQL>
[解决办法]
- SQL code
1. Simple AFTER update trigger SQL> create table t( x int, 2 constraint t_pk primary key(x) 3 );Table created.SQL>SQL>SQL> create trigger t_trigger AFTER update on T for each row 2 begin 3 dbms_output.put_line( 'Updated x=' || :old.x || ' to x=' || :new.x ); 4 end; 5 /Trigger created.SQL>SQL> insert into t values ( 1 );1 row created.SQL> insert into t values ( 2 );1 row created.SQL>SQL> set serveroutput onSQL>SQL> update t set x = 2;Updated x=1 to x=2Updated x=2 to x=2update t set x = 2*ERROR at line 1:ORA-00001: unique constraint (JAVA2S.T_PK) violatedSQL>SQL> update t set x = x+1;Updated x=1 to x=2Updated x=2 to x=32 rows updated.SQL>SQL>SQL> drop table t;Table dropped.SQL>SQL>SQL>2. Create an after update trigger SQL> -- create demo tableSQL> create table Employee( 2 ID VARCHAR2(4 BYTE) NOT NULL, 3 First_Name VARCHAR2(10 BYTE), 4 Last_Name VARCHAR2(10 BYTE), 5 Start_Date DATE, 6 End_Date DATE, 7 Salary Number(8,2), 8 City VARCHAR2(10 BYTE), 9 Description VARCHAR2(15 BYTE) 10 ) 11 /Table created.SQL>SQL> -- prepare dataSQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description) 2 values ('01','Jason', 'Martin', to_date('19960725','YYYYMMDD'), to_date('20060725','YYYYMMDD'), 1234.56, 'Toronto', 'Programmer') 3 /1 row created.SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description) 2 values('02','Alison', 'Mathews', to_date('19760321','YYYYMMDD'), to_date('19860221','YYYYMMDD'), 6661.78, 'Vancouver','Tester') 3 /1 row created.SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description) 2 values('03','James', 'Smith', to_date('19781212','YYYYMMDD'), to_date('19900315','YYYYMMDD'), 6544.78, 'Vancouver','Tester') 3 /1 row created.SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description) 2 values('04','Celia', 'Rice', to_date('19821024','YYYYMMDD'), to_date('19990421','YYYYMMDD'), 2344.78, 'Vancouver','Manager') 3 /1 row created.SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description) 2 values('05','Robert', 'Black', to_date('19840115','YYYYMMDD'), to_date('19980808','YYYYMMDD'), 2334.78, 'Vancouver','Tester') 3 /1 row created.SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description) 2 values('06','Linda', 'Green', to_date('19870730','YYYYMMDD'), to_date('19960104','YYYYMMDD'), 4322.78,'New York', 'Tester') 3 /1 row created.SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description) 2 values('07','David', 'Larry', to_date('19901231','YYYYMMDD'), to_date('19980212','YYYYMMDD'), 7897.78,'New York', 'Manager') 3 /1 row created.SQL> insert into Employee(ID, First_Name, Last_Name, Start_Date, End_Date, Salary, City, Description) 2 values('08','James', 'Cat', to_date('19960917','YYYYMMDD'), to_date('20020415','YYYYMMDD'), 1232.78,'Vancouver', 'Tester') 3 /1 row created.SQL>SQL>SQL>SQL> -- display data in the tableSQL> select * from Employee 2 /ID FIRST_NAME LAST_NAME START_DAT END_DATE SALARY CITY DESCRIPTION---- ---------- ---------- --------- --------- ---------- ---------- ---------------01 Jason Martin 25-JUL-96 25-JUL-06 1234.56 Toronto Programmer02 Alison Mathews 21-MAR-76 21-FEB-86 6661.78 Vancouver Tester03 James Smith 12-DEC-78 15-MAR-90 6544.78 Vancouver Tester04 Celia Rice 24-OCT-82 21-APR-99 2344.78 Vancouver Manager05 Robert Black 15-JAN-84 08-AUG-98 2334.78 Vancouver Tester06 Linda Green 30-JUL-87 04-JAN-96 4322.78 New York Tester07 David Larry 31-DEC-90 12-FEB-98 7897.78 New York Manager08 James Cat 17-SEP-96 15-APR-02 1232.78 Vancouver Tester8 rows selected.SQL>SQL>SQL> --after update triggerSQL> CREATE OR REPLACE TRIGGER employee_after_update 2 AFTER UPDATE 3 ON employee 4 FOR EACH ROW 5 6 DECLARE 7 v_username varchar2(10); 8 9 BEGIN 10 11 -- Find username of person performing UPDATE into table 12 SELECT user INTO v_username 13 FROM dual; 14 15 dbms_output.put_line('By: '||v_username); 16 dbms_output.put_line(':new.id: '||:new.id); 17 dbms_output.put_line(':new.first_name: '||:new.first_name); 18 dbms_output.put_line(':new.last_name: '||:new.last_name); 19 dbms_output.put_line(':old.id: '||:old.id); 20 dbms_output.put_line(':old.first_name: '||:old.first_name); 21 dbms_output.put_line(':old.last_name: '||:old.last_name); 22 23 END; 24 /Trigger created.SQL>SQL> update employee set first_name = 'new';By: JAVA2S:new.id: 01:new.first_name: new:new.last_name: Martin:old.id: 01:old.first_name: Jason:old.last_name: MartinBy: JAVA2S:new.id: 02:new.first_name: new:new.last_name: Mathews:old.id: 02:old.first_name: Alison:old.last_name: MathewsBy: JAVA2S:new.id: 03:new.first_name: new:new.last_name: Smith:old.id: 03:old.first_name: James:old.last_name: SmithBy: JAVA2S:new.id: 04:new.first_name: new:new.last_name: Rice:old.id: 04:old.first_name: Celia:old.last_name: RiceBy: JAVA2S:new.id: 05:new.first_name: new:new.last_name: Black:old.id: 05:old.first_name: Robert:old.last_name: BlackBy: JAVA2S:new.id: 06:new.first_name: new:new.last_name: Green:old.id: 06:old.first_name: Linda:old.last_name: GreenBy: JAVA2S:new.id: 07:new.first_name: new:new.last_name: Larry:old.id: 07:old.first_name: David:old.last_name: LarryBy: JAVA2S:new.id: 08:new.first_name: new:new.last_name: Cat:old.id: 08:old.first_name: James:old.last_name: Cat8 rows updated.SQL>SQL>SQL> -- clean the tableSQL> drop table Employee 2 /Table dropped.SQL>SQL>
[解决办法]
收藏下。。。
[解决办法]
触发器可以实现，但是不建议用触发器来做。
直接在程序里来实现就好了。如果修改某个表的字段，多写个update 语句记录一下就好了。
我的观点，数据库是用来存放数据的，不要把程序做的事情丢给数据库来实现。
[解决办法]
LS 但是数据库实现应该效率会好点吧。
[解决办法]
建立如果表中数据比较庞大，就不要使用触发器，那样的话，触发器维护成本大。
如果数据量不是很大，建议使用触发器，这样效率比程序实现好