Я внес ваши изменения и пытаюсь внести еще несколько. Моя цель - выпустить обновление в таблице access_history и установить обработанное = 1 для тех записей, которые создали набор записей emp_attendance.
Когда я пытаюсь найти MIN (ts) и MAX (ts), я получить следующую ошибку
ORA-00937: не функция одногрупповой группы
Когда я добавляю группу, я получаю другую ошибку. Я разместил код с ошибкой, и мне было интересно, можете ли вы сказать мне, как выполнить sh удаление ошибки и выполнить обновление в том же запросе.
-- Drop table emp_info purge:
-- Drop table locations purge;
-- Drop table access_histoty purge;
-- Drop table emp_attendance purge;
ALTER SESSION SET NLS_DATE_FORMAT = 'MMDDYYYY HH24:MI:SS';
CREATE TABLE employees
(
employee_id NUMBER(6),
first_name VARCHAR2(20),
last_name VARCHAR2(25) NOT NULL,
card_num varchar2(10) NOT NULL
);
ALTER TABLE employees
ADD ( CONSTRAINT employee_id_pk
PRIMARY KEY (employee_id));
Insert into employees values (1, 'Mike', 'Jones', 'AAA1');
Insert into employees values (2, 'Jane', 'Doe', 'BBB2');
Insert into employees values (3, 'Paul', 'Smith', 'CCC3');
Insert into employees values (4, 'John', 'Henry', 'DDD4');
Create table locations(
location_id NUMBER(4),
location_name varchar2(30),
location_type char(1));
-- A=access T=Time & Attendance
ALTER TABLE locations
ADD ( CONSTRAINT lication_id_pk
PRIMARY KEY (location_id));
Insert into locations values (101, 'South Front Door 1', 'T');
Insert into locations values (102, 'South Front Door 2', 'T');
Insert into locations values (103, 'East Back Door 1', 'T');
Insert into locations values (104, 'East Back Door 2', 'T');
Insert into locations values (105,'Computer Room', 'A');
Insert into locations values (106,'1st Floor North', 'A');
Create table access_history(
employee_id NUMBER(6),
card_num varchar2(10),
location_id number(4),
Access_date date,
ts timestamp default systimestamp,
processed NUMBER(1) default 0
);
INSERT INTO access_history
( employee_id, card_num,
location_id, Access_date )
VALUES (1, 'AAA1', 101, TO_DATE('06212020 21:02:04', 'MMDDYYYY HH24:MI:SS'));
-- TYpe T no previous data for this
-- empid record INSERT empid,
-- start time ONLY in table below
-- and update last_start_date
-- with DATETIME.
INSERT INTO access_history
( employee_id, card_num,
location_id, Access_date )
VALUES (1, 'AAA1', 102, TO_DATE('06212020 23:52:14', 'MMDDYYYY HH24:MI:SS'));
-- Type T record empid, start_time
-- set update end_time only in
-- emp_attendance.
INSERT INTO access_history
( employee_id, card_num,
location_id, Access_date )
VALUES (2, 'BBB2', 103, TO_DATE('06212020 08:32:35', 'MMDDYYYY HH24:MI:SS'));
-- TYpe T INSERT empid, start
-- time ONLY in emp_attendance.
-- update last_start_date with
-- DATETIME on emp_info table
INSERT INTO access_history
( employee_id, card_num,
location_id, Access_date )
VALUES (2, 'BBB2', 102, TO_DATE('06212020 15:39:05', 'MMDDYYYY HH24:MI:SS'));
-- Type T record empid, start_time
-- set, update end_time only in
-- emp_attendance.
INSERT INTO access_history
( employee_id, card_num,
location_id, Access_date )
VALUES (3, 'CCC3', 103, TO_DATE('06212020 15:39:05', 'MMDDYYYY HH24:MI:SS'));
-- TYpe T INSERT empid, start
-- time ONLY in emp_attendance.
-- update last_start_date with
-- DATETIME on emp_info table
INSERT INTO access_history
( employee_id, card_num,
location_id, Access_date )
VALUES (3, 'CCC3', 105, TO_DATE('06212020 18:19:55', 'MMDDYYYY HH24:MI:SS'));
-- Type A record don't do anything to
-- emp_attendance.
INSERT INTO access_history
( employee_id, card_num,
location_id, Access_date )
VALUES (4, 'DDD4', 102, TO_DATE('06212020 08:49:35', 'MMDDYYYY HH24:MI:SS'));
-- single record with no pair. Set
-- end_date to start_date if end_date
-- is NULL
INSERT INTO access_history
( employee_id, card_num,
location_id, Access_date )
VALUES (3, 'CCC3', 104, TO_DATE('06222020 04:04:35', 'MMDDYYYY HH24:MI:SS'));
-- Type T record empid, start_time
-- set, update end_time only in
-- emp_attendance.
CREATE TABLE emp_attendance
(seq_num NUMBER(10),
employee_id NUMBER(6),
start_date DATE,
end_date DATE,
create_date DATE DEFAULT SYSDATE
);
Create sequence emp_attendance_seq;
insert into emp_attendance.
(seq_num,
employee_id,
start_date,
end_date)
with
-- error capturing min,max ts
--
prep (min_ts, max_ts, employee_id, start_date, rn, end_date) as (
select MIN(ts), MAX(ts), employee_id, access_date
, row_number() over (partition by card_num order by access_date)
, lead(access_date) over (partition by card_num order by access_date)
from access_history
where location_id in ( select location_id
from locations
where location_type = 'T'
)
AND processed = 0
)
select emp_attendance_seq.nextval,
employee_id,
start_date,
nvl(end_date, start_date)
from prep
where mod(rn, 2) = 1;