I have one table, i have three columns, start_hour, end_hour and date,
in ORACLE Apex i have a form page with two items, P00_START_HOUR and P00_END_HOUR, i need to create a validation, to prevent an insert in the same date between start_hour and end_hour from the table.
For example, if in the table i already have
| start_hour || end_hour |
| 12:00PM || 08:00PM |
I can't insert a value, who is between these two hours
like this
P00_START_HOUR = 08:00AM
P00_END_HOUR = 01:00PM
I have no idea how to do it.
I created a user table for this example
create table users (
id number generated by default on null as identity
constraint users_id_pk primary key,
name varchar2(50),
the_user varchar2(20),
email varchar2(30),
created date not null,
created_by varchar2(255) not null,
updated date not null,
updated_by varchar2(255) not null
);
-- triggers
create or replace trigger users_biu
before insert or update
on users
for each row
begin
if inserting then
:new.created := sysdate;
:new.created_by := nvl(sys_context('APEX$SESSION','APP_USER'),user);
end if;
:new.updated := sysdate;
:new.updated_by := nvl(sys_context('APEX$SESSION','APP_USER'),user);
end users_biu;
/
When the page has been loaded I'm calculating last user created
declare
l_user varchar2(30);
begin
select the_user into l_user
from users
order by id desc
FETCH FIRST 1 ROWS ONLY;
return l_user;
end;
Create a validation, I compared with 1 hour but you can use your own rules
declare
l_created_hour varchar2(50);
l_next_hour varchar2(50);
begin
select to_char(CREATED,'DD-MM-YYYY hh:mi:ss'),
to_char(CREATED + 1/24,'DD-MM-YYYY hh:mi:ss')
into l_created_hour, l_next_hour
from USERS
where the_user = :P3_LAST_USER;
if l_next_hour >= l_created_hour then
return false;
else
return true;
end if;
end;
The result is
Download the app
Related
INSERT AND UPDATE STATEMENTS IN ANYNIMOUS BLOCK SI NOT CALLING TRIGGER BEACAUSE ERROR IN MY TRIG CODE PLEASE HELP ME TO SOLVE MY MISTAKE AS I AM NOOB IN TRIGGER CONCEPT......
Question:
HR Manager wants to keep track of all manager details of every department for auditing in the future. Whenever an HR Manager assigns a new manager, the following manager details should be recorded in DEPT_MANAGER_LOG table.
department_id : department for which manager is getting assigned or getting modified
manager_id : employee_id who is being assigned as manager
start_date : date on which manager is getting assigned for a department
end_date: end_date of manager (when a manager is assigned the end_date will be null)
user_name: name of database user who is doing this modification
Whenever an HR Manager changes manager of any department, the end date of previous manager need to be updated and details of new manager need to be inserted in DEPT_MANAGER_LOG table.'''
create or replace trigger trg_mgr_log
before insert or update of manager_id on departments
for each row
CODE:
create or replace trigger trg_mgr_log
before insert or update of manager_id on departments
for each row
declare
v_dpid departments.department_id%type ;
v_mgr_id departments.manager_id%type ;
v_start_date JOB_HISTORY.START_DATE%type;
v_end_date JOB_HISTORY.END_DATE%type;
begin
/*v_dpid := :new.department_id;
select manager_id into v_mgr_id from departments where department_id = v_dpid;*/
select START_DATE, END_DATE into v_start_date, v_end_date from job_history where employee_id =
v_mgr_id;
if inserting then
v_dpid := :new.department_id;
select manager_id into v_mgr_id from departments where department_id = v_dpid;
if(v_mgr_id is null) then
insert into DEPT_MANAGER_LOG values (v_dpid, :new.manager_id,SYSTIMESTAMP,null,user);
end if;
elsif updating then
v_dpid := :OLD.department_id;
select manager_id into v_mgr_id from departments where department_id = v_dpid;
if(v_mgr_id is not null) then
insert into DEPT_MANAGER_LOG values (v_dpid, :old.manager_id,v_start_date,SYSTIMESTAMP,user);
insert into DEPT_MANAGER_LOG values (v_dpid, :new.manager_id,SYSTIMESTAMP,null,user);
end if;
end if;
end; '
You may be getting a "mutating table" error, because you're selecting from the same table that the trigger is defined on. The following should fix that issue:
create or replace trigger trg_mgr_log
before insert or update of manager_id on departments
for each row
begin
if inserting and
:new.manager_id is null
then
insert into DEPT_MANAGER_LOG values (:new.department_id, :new.manager_id, SYSTIMESTAMP, null, user);
elsif updating and
:OLD.manager_id is not null
then
declare
v_start_date JOB_HISTORY.START_DATE%type;
begin
select START_DATE
into v_start_date
from job_history
where employee_id = :new.manager_id;
insert into DEPT_MANAGER_LOG values (:OLD.department_id, :old.manager_id, v_start_date, SYSTIMESTAMP, user);
insert into DEPT_MANAGER_LOG values (:OLD.department_id, :new.manager_id, SYSTIMESTAMP, null, user);
end;
end if;
end;
create or replace PROCEDURE ADD_TO_BLACKLIST(
P_EMPLOYEE_USERNAME IN VARCHAR2,
T_CURSOR OUT SYS_REFCURSOR
)
AS
BEGIN
DECLARE
E_COUNT PLS_INTEGER := 0;
BEGIN
SELECT COUNT(*) INTO E_COUNT FROM EXAMPLE_TABLE
WHERE UPPER(EMPLOYEE_USERNAME) LIKE UPPER(P_EMPLOYEE_USERNAME)||'%';
IF E_COUNT = 0 THEN
INSERT INTO EXAMPLE_TABLE
(employee_number, employee_username)
SELECT EMPLOYEE_NUMBER, EMAIL FROM EXAMPLE_VIEW
WHERE UPPER(EMAIL)=CONCAT(UPPER(P_EMPLOYEE_USERNAME), '#microsoft.com');
ELSE
UPDATE EXAMPLE_TABLE
SET (EMPLOYEE_NUMBER, EMPLOYEE_USERNAME) =
(SELECT EMPLOYEE_NUMBER, EMAIL FROM EXAMPLE_VIEW
WHERE UPPER(EMAIL) = CONCAT(UPPER(P_EMPLOYEE_USERNAME), '#microsoft.com'));
COMMIT;
END IF;
OPEN T_CURSOR For
SELECT * FROM EXAMPLE_VIEW
WHERE EMAIL LIKE CONCAT(UPPER(P_EMPLOYEE_USERNAME), '%');
END;
END ADD_TO_BLACKLIST;
This compiles, but when I try to test it with a valid P_EMPLOYEE_USERNAME (which I've confirmed to be in the EXAMPLE_VIEW), I do not see any data being inserted.
I am new to PLSQL and not sure how to figure out the value of E_COUNT
The Example_Table DDL is
CREATE TABLE "Example_Table"
( "EMPLOYEE_NUMBER" NUMBER NOT NULL ENABLE,
"EMPLOYEE_USERNAME" VARCHAR2(250 BYTE) NOT NULL ENABLE,
"ACCOUNT_STATUS" NUMBER DEFAULT 0,
"ACCOUNT_STATUS_LAST_UPDATE" TIMESTAMP (6) DEFAULT SYSDATE NOT NULL ENABLE,
CONSTRAINT "BOE_SAFEGAURD_PK" PRIMARY KEY ("EMPLOYEE_USERNAME"))
The issue is in below line,you are not converting the case after concatenation.please modify and try below,
WHERE UPPER(EMAIL) = UPPER(CONCAT(UPPER(P_EMPLOYEE_USERNAME), '#microsoft.com'));
EDIT : To prove the theory please find below the details.
I have tested this and it works,
DDL to create the tables:
CREATE TABLE Example_Table
( EMPLOYEE_NUMBER NUMBER NOT NULL ENABLE,
EMPLOYEE_USERNAME VARCHAR2(250 BYTE) NOT NULL ENABLE,
ACCOUNT_STATUS NUMBER DEFAULT 0,
ACCOUNT_STATUS_LAST_UPDATE TIMESTAMP (6) DEFAULT SYSDATE NOT NULL ENABLE,
CONSTRAINT BOE_SAFEGAURD_PK PRIMARY KEY (EMPLOYEE_USERNAME));
CREATE TABLE Example_view
( EMPLOYEE_NUMBER NUMBER NOT NULL ENABLE,
EMAIL VARCHAR2(250 BYTE) NOT NULL ENABLE,
ACCOUNT_STATUS NUMBER DEFAULT 0,
ACCOUNT_STATUS_LAST_UPDATE TIMESTAMP (6) DEFAULT SYSDATE NOT NULL ENABLE
);
DML to populate data to example_view that will be used for the test.
insert into example_view values(1,'Test#microsoft.com',1,sysdate);
Modified the procedure to add UPPER on the rightside of the join for both insert and update conditions and place the commit after end if.A good code should have only one commit and that should be at the end of execution before the exception block of main begin..end block.
create or replace PROCEDURE ADD_TO_BLACKLIST(
P_EMPLOYEE_USERNAME IN VARCHAR2,
T_CURSOR OUT SYS_REFCURSOR
)
AS
BEGIN
DECLARE E_COUNT PLS_INTEGER := 0;
BEGIN
SELECT COUNT(*) INTO E_COUNT FROM EXAMPLE_TABLE WHERE UPPER(EMPLOYEE_USERNAME) LIKE UPPER(P_EMPLOYEE_USERNAME)||'%';
IF E_COUNT = 0 THEN
INSERT INTO EXAMPLE_TABLE
(employee_number, employee_username)
SELECT EMPLOYEE_NUMBER, EMAIL FROM EXAMPLE_VIEW WHERE UPPER(EMAIL)=UPPER(CONCAT(UPPER(P_EMPLOYEE_USERNAME), '#microsoft.com'));
ELSE
UPDATE EXAMPLE_TABLE SET (EMPLOYEE_NUMBER, EMPLOYEE_USERNAME) = (SELECT EMPLOYEE_NUMBER, EMAIL FROM EXAMPLE_VIEW WHERE UPPER(EMAIL)=UPPER(CONCAT(UPPER(P_EMPLOYEE_USERNAME), '#microsoft.com')));
END IF;
COMMIT;
OPEN T_CURSOR For
SELECT * FROM EXAMPLE_VIEW WHERE EMAIL LIKE CONCAT(UPPER(P_EMPLOYEE_USERNAME), '%');
END;
END ADD_TO_BLACKLIST;
In an anonymous block invoked the procedure,
DECLARE
T_CURSOR SYS_REFCURSOR;
BEGIN
ADD_TO_BLACKLIST('test',T_CURSOR);
end;
Ran a query to check if records are inserted,
select * from example_table;
Output is below,
You just need a commit after IF-ELSE condition rather than inside it. I have updated your code along with some other minor updates -
create or replace PROCEDURE ADD_TO_BLACKLIST( P_EMPLOYEE_USERNAME IN VARCHAR2,
T_CURSOR OUT SYS_REFCURSOR
)
AS
E_COUNT PLS_INTEGER := 0;
BEGIN
SELECT COUNT(*)
INTO E_COUNT
FROM EXAMPLE_TABLE
WHERE UPPER(EMPLOYEE_USERNAME) LIKE UPPER(P_EMPLOYEE_USERNAME)||'%';
IF E_COUNT = 0 THEN
INSERT INTO EXAMPLE_TABLE
(employee_number, employee_username)
SELECT EMPLOYEE_NUMBER, EMAIL
FROM EXAMPLE_VIEW
WHERE UPPER(EMAIL) = CONCAT(UPPER(P_EMPLOYEE_USERNAME), '#microsoft.com');
ELSE
UPDATE EXAMPLE_TABLE
SET (EMPLOYEE_NUMBER, EMPLOYEE_USERNAME) = (SELECT EMPLOYEE_NUMBER, EMAIL
FROM EXAMPLE_VIEW
WHERE UPPER(EMAIL)=CONCAT(UPPER(P_EMPLOYEE_USERNAME), '#microsoft.com'));
END IF;
COMMIT;
OPEN T_CURSOR For
SELECT *
FROM EXAMPLE_VIEW
WHERE EMAIL LIKE CONCAT(UPPER(P_EMPLOYEE_USERNAME), '%');
END ADD_TO_BLACKLIST;
I want to create a trigger to calculate total attendance for each distinct record from the given table.
DAILY_ATT
The second table should generate output like this:
TOTAL_ATT
Here's what I have done:
CREATE TABLE daily_att
(
roll_no NUMBER(5),
subject VARCHAR2(10),
attendance NUMBER(5),
date_att DATE
);
CREATE TABLE total_att
(
roll_no NUMBER(5) NOT NULL PRIMARY KEY,
total_attendance NUMBER(5)
);
INSERT INTO DAILY_ATT VALUES(1, 'MATHS', 0, '04-MAY-18');
INSERT INTO DAILY_ATT VALUES(1, 'ENG', 1, '04-MAY-18');
INSERT INTO DAILY_ATT VALUES(2, 'MATHS', 1, '04-MAY-18');
INSERT INTO DAILY_ATT VALUES(2, 'ENG', 1, '04-MAY-18');
INSERT INTO DAILY_ATT VALUES(1, 'MATHS', 1, '05-MAY-18');
INSERT INTO DAILY_ATT VALUES(1, 'ENG', 1, '05-MAY-18');
INSERT INTO DAILY_ATT VALUES(2, 'MATHS', 0, '05-MAY-18');
INSERT INTO DAILY_ATT VALUES(2, 'ENG', 0, '05-MAY-18');
SELECT * FROM DAILY_ATT;
CREATE OR replace TRIGGER att
AFTER INSERT OR UPDATE ON daily_att
FOR EACH ROW
BEGIN
SELECT SUM(attendance)
INTO Total_att(total_attendance)
FROM daily_att
WHERE roll_no = :NEW.roll_no;
END;
Hope this will serve your purpose
CREATE OR REPLACE TRIGGER create_subtotal
AFTER INSERT OR UPDATE OR DELETE ON DAILY_ATTENDANCE
FOR EACH ROW
DECLARE
V_ROLL_NO NUMBER(8);
V_TOT_ATTENDANCE NUMBER(4);
BEGIN
SELECT ROLL_NO,SUM(ATTENDANCE)
INTO V_ROLL_NO,V_TOT_ATTENDANCE
FROM DAILY_ATTENDANCE
WHERE ROLL_NO = :new.ROLL_NO AND DATE_ATT=TRUNC(SYSDATE);
BEGIN
update TOTAL_ATTENDANCE
set TOTAL_ATTENDANCE= TOT_ATTENDANCE
where ROLL_NO = V_ROLL_NO;
if sql%rowcount = 0 then
-- no rows were updated, so the record does not exist
insert into TOTAL_ATTENDANCE (ROLL_NO,TOTAL_ATTENDANCE )
values ( V_ROLL_NO,V_TOT_ATTENDANCE );
END IF;
END;
END;
I would recommend you to not abuse a Trigger for this purpose. Simply create a view.
CREATE
OR replace VIEW total_att AS
SELECT roll_no
,SUM(attendance) as total_attendance
FROM daily_att
GROUP BY roll_no;
select * FROM total_attendance;
ROLL_NO TOTAL_ATTENDANCE
1 3
2 2
My suggestion would be to use this set of 2 triggers:
The core one:
CREATE OR REPLACE TRIGGER create_subtotal
AFTER UPDATE OF roll_no, attendance OR INSERT OR DELETE ON daily_att
FOR EACH ROW
DECLARE
v_roll_no daily_att.roll_no%TYPE;
v_before daily_att.attendance%TYPE;
v_after daily_att.attendance%TYPE;
v_diff daily_att.attendance%TYPE;
BEGIN
IF UPDATING AND (:NEW.roll_no <> :OLD.roll_no) THEN
RAISE_APPLICATION_ERROR( -20001, 'Altering ROLL_NO is not allowed!' );
END IF;
IF NOT INSERTING THEN
v_before := :OLD.attendance;
v_roll_no := :OLD.roll_no;
ELSE
v_before := 0;
v_roll_no := :NEW.roll_no;
END IF;
IF NOT DELETING THEN
v_after := :NEW.attendance;
ELSE
v_after := 0;
END IF;
v_diff := v_after - v_before;
IF INSERTING OR (v_diff <> 0) THEN
UPDATE total_att
SET total_attendance = total_attendance + v_diff
WHERE roll_no = v_roll_no;
IF SQL%ROWCOUNT = 0 THEN
INSERT INTO total_att (roll_no, total_attendance)
VALUES (v_roll_no, v_diff);
END IF;
END IF;
END;
An auxiliary one:
CREATE OR REPLACE TRIGGER delete_subtotal
AFTER DELETE ON daily_att
BEGIN
DELETE FROM total_att
WHERE NOT EXISTS (SELECT 1
FROM daily_att d
WHERE total_att.roll_no = d.roll_no);
END;
I've assumed that ROLL_NO is never NULL, nor should ever be changed, and that ATTENDANCE is also never NULL. I basically ignored the SUBJECT and DATE_ATT columns, as from the question, they do not seem to impact the goal.
The auxiliary trigger can be dropped, if you do not need to handle deletes from the DAILY_ATT table, or can stand zero entries in TOTAL_ATT table, for things removed from DAILY_ATT completely.
For better performance, the check for ROLL_NO change should be moved to a separate BEFORE UPDATE trigger. The auxiliary trigger will usually benefit much from an index on ROLL_NO in the DAILY_ATT table.
Here's an SQL Fiddle for this.
I have an EMPLOYEE table with SALARY field. I'm using Oracle SQL developer. I want to write a trigger so that when someone update salary in EMPLOYEE table, it will update Salary field in EMPLOYEE_SALARIES table as low, medium, high. Here's the second table.
CREATE TABLE Employee_Salaries(
Ssn CHAR(9) NOT NULL,
Salary VARCHAR(10),
Log_Date DATE
);
Here's the trigger and procedure to update the Salary field to low, middle or high.
CREATE OR REPLACE PROCEDURE salaryType(x IN NUMBER, y OUT VARCHAR) IS
BEGIN
IF x >= 60000 THEN y := 'HIGH';
ELSIF (x >= 40000 AND x <= 60000) THEN y := 'MEDIUM';
ELSE y := 'LOW';
END IF;
END salaryType;
/
I get compiler error on this trigger. Please tell me what I did wrong or am I missing something.
CREATE OR REPLACE TRIGGER salary1
AFTER INSERT OR UPDATE ON Employee
FOR EACH ROW
BEGIN
DECLARE
salaryRank VARCHAR(10) := ' ';
salaryType(:new.Salary, salaryRank);
INSERT INTO Employee_Salaries(Ssn, Salary, Log_Date) VALUES (:new.Ssn, salaryRank, SYSDATE);
END;
/
Declaration Part is at wrong place(should be before BEGIN and just after FOR EACH ROW statement of TRIGGER's header), Make it as the following :
CREATE OR REPLACE TRIGGER salary1
AFTER INSERT OR UPDATE ON Employee
FOR EACH ROW
DECLARE
salaryRank VARCHAR(10) := ' ';
BEGIN
salaryType(:new.Salary, salaryRank);
INSERT INTO Employee_Salaries(Ssn, Salary, Log_Date) VALUES (:new.Ssn, salaryRank, SYSDATE);
END;
The keyword BEGIN in the trigger is in the wrong place. It should come after the DEFINE block; that is, after you declare salaryrank and before you invoke the procedure.
create table account_type
(
acct_type number(3) primary key,
acct_desc Varchar2(30) not null CHECK (acct_desc IN('savings','salary','current','credit')),
acct_wd_limit number(10)
);
create sequence acct_seq;
CREATE OR REPLACE TRIGGER acct_pk
BEFORE INSERT ON account_type
FOR EACH ROW
WHEN (new.acct_type IS NULL)
BEGIN
SELECT acct_seq.NEXTVAL
INTO :new.acct_type
FROM account_type;
END;
i am getting an error on the line before insert on account_type. no idea why
I also tried doing
CREATE OR REPLACE TRIGGER acct_pk
BEFORE INSERT ON account_type
FOR EACH ROW
WHEN (new.id IS NULL)
BEGIN
SELECT acct_seq.NEXTVAL
INTO :new.id
FROM account_type;
END;
Even doing this is giving me an error
create sequence acct_pk
start with 1
increment by 1
max value 999
min value 1
no cycle;
Thanks
Since the author tagged the question with oracle10g, she can't use sequence_name.nextVal in PL/SQL. Solution:
CREATE OR REPLACE TRIGGER acct_pk
BEFORE INSERT ON account_type
FOR EACH ROW
DECLARE
v_acct_type NUMBER;
BEGIN
IF :new.acct_type IS NULL THEN
SELECT acct_seq.NEXTVAL
INTO v_acct_type
FROM dual;
:new.acct_type := v_acct_type;
END IF;
END;