CREATE TABLE Vitals
(
Record_No int NOT NULL PRIMARY KEY,
Patient_ID int,
Date_Taken DATE NOT NULL,
Time_Taken time(7) NOT NULL,
Systolic int,
CHECK (Systolic > Diastolic),
Diastolic int,
Heart_Rate int CHECK (Heart_Rate > 30),
CONSTRAINT fk_Patient_ID FOREIGN KEY (Patient_ID) REFERENCES Patients(Patient_ID)
);
But, I get an error
Time_Taken time(7) NOT NULL,
*
ERROR at line 6:
ORA-00907: missing right parenthesis
When I use timestamp default systimestamp
it works. All I need is the time for Time_Taken column.
enter image description here
You can not use the TIME data type as it is not the oracle defined datatype.
You can use the DATE or TIMESTAMP data type to store time with date.
Supported data types in oracle are documented here.
Related
CREATE TABLE employee (
id INT PRIMARY KEY,
username TEXT NOT NULL,
email TEXT NULL,
created_on TIMESTAMP NOT NULL,
);
SELECT username, email FROM employee where created_on between '2012-01-20' and '2012-04-24'
That actually seems to work: http://sqlfiddle.com/#!17/ef8e85/1
Mind though that you have a syntax error in your CREATE TABLE, you need to remove the last comma.
I have the following table:
CREATE TABLE duration
(
departure_time TIMESTAMPTZ,
arrival_time TIMESTAMPTZ,
duration TIME NOT NULL, -- Not sure about the datatype..
flight_id INT UNIQUE NOT NULL,
CHECK (scheduled_duration > 0),
CHECK (scheduled_arrival_time > scheduled_departure_time),
FOREIGN KEY (flight_id) REFERENCES flight(flight_id),
PRIMARY KEY (scheduled_departure_time, scheduled_arrival_time)
);
I want to calculate arrival_time - departure_time and then insert the result into the column duration. Preferably, the result of the duration subtraction would be 6h 30m. I am new to databases and PostgreSQL and I can't find a way to calculate a subtraction of two timestamps, taking into consideration their timezones at the same time.
Use a generated column
CREATE TABLE duration
(
departure_time TIME WITH TIME ZONE,
arrival_time TIME WITH TIME ZONE,
scheduled_duration INT,
flight_id INT,
duration2 TIME GENERATED ALWAYS AS ("arrival_time"::time - "departure_time"::time) STORED,
CHECK (scheduled_duration > 0),
CHECK (arrival_time > departure_time),
FOREIGN KEY (flight_id) REFERENCES flight(flight_id),
PRIMARY KEY (departure_time, arrival_time)
);
SELECT
EXTRACT(EPOCH FROM '2022-07-07 15:00:00.00000'::TIMESTAMP - '2022-07-07 15:00:00.00000'::TIMESTAMP)
CREATE TABLE Pizza
(
pizza_id DECIMAL(12) NOT NULL PRIMARY KEY,
name VARCHAR(32) NOT NULL,
date_available DATE NOT NULL,
price DECIMAL(4,2) NOT NULL
);
CREATE TABLE Topping
(
topping_id DECIMAL(12) NOT NULL,
topping_name VARCHAR(64) NOT NULL,
pizza_id DECIMAL(12)
);
ALTER TABLE Topping
ADD CONSTRAINT topping_pk PRIMARY KEY(topping_id);
ALTER TABLE Topping
ADD CONSTRAINT Topping_pizza_fk
FOREIGN KEY(pizza_id) REFERENCES Pizza(pizza_id);
INSERT INTO pizza (pizza_id, name, date_available, price)
VALUES (1, 'Plain', CAST('27-Feb-2021' AS DATE), 6);
Error:
ORA-01858: a non-numeric character was found where a numeric was expected
I cannot figure out which part is wrong, I'm just a beginner for SQL, it seems related with date, can someone help me?
This works for me: SQL Fiddle. Don't use CAST to convert strings to dates. That's the only thing that looks off about your example. It may be using a different default date format than your string. Instead use TO_DATE( '27-Feb-2021', 'DD-Mon-YYYY') which converts a string to a date, or DATE '2021-02-27', which is a date literal and only takes the yyyy-mm-dd format.
Additionally, I'd suggest using NUMBER instead of DECIMAL just because it's more standard in the Oracle world. And always use VARCHAR2 instead of VARCHAR, which is officially discouraged.
I have been struggling for several hours now and I have not been able to find the solution to my problem. This is an assignment, but I am stuck in this part.
CREATE TABLE Trip
(
Trip_Id SERIAL,
Origin VARCHAR(50) NOT NULL,
Destination VARCHAR(50) NOT NULL,
Date_Time_Picked TIMESTAMP NOT NULL DEFAULT CURRENT_DATE,
Estimated_Time TIME NOT NULL DEFAULT CURRENT_TIME,
Price DECIMAL NOT NULL,
PRIMARY KEY(Trip_Id)
);
INSERT INTO Trip (Origin, Destination, Estimated_Time, Price )
VALUES ('Hialeah' ,'Miami Beach', 30:00, 40.00);
The insert statement in postgreSQL shows a error because the time format. The column Estimated_Time is supposed to store the time in minutes and seconds, but the compiler shows an error because interprets 30:00 as hours and seconds. How can I handle the input of the user to save 30:00 as 30 minutes and 0 seconds. The Trip table can be modified, obviously, the insert statement requires a conversion or cast from '30:00' to Time type, but I am lost in how to do it. Unfortunately, books do not explain how this is done. I would greatly appreciate any hint or example. Thanks in advance.
as pointed out by a_horse_with_no_name and jarlh,
Estimated_Time is the duration of the trip, so the format should be interval
CREATE TABLE trip (
trip_id SERIAL,
origin VARCHAR(50) NOT NULL,
destination VARCHAR(50) NOT NULL,
date_time_picked TIMESTAMP WITHOUT TIME ZONE DEFAULT 'now'::text::date NOT NULL,
estimated_time INTERVAL,
price NUMERIC NOT NULL,
CONSTRAINT trip_pkey PRIMARY KEY(trip_id)
)
and the insert sould be
INSERT INTO Trip (Origin, Destination, Estimated_Time, Price )
VALUES ('Hialeah' ,'Miami Beach', '00:30:00', 40.00);
How to check time entry only so that any entry before is not acceptable?
CREATE TABLE demo.event(
ecode CHAR(4) UNIQUE NOT NULL PRIMARY KEY,
edesc VARCHAR(20) NOT NULL,
elocation VARCHAR(20) NOT NULL,
edate DATE NOT NULL
CONSTRAINT date_check CHECK(edate BETWEEN '2016/04/01' AND '2016/04/30'),
etime TIME NOT NULL
CONSTRAINT time_check CHECK(etime (HOUR > '08:00:00')),
emax SMALLINT NOT NULL
CONSTRAINT emax_check CHECK(emax >=1 OR emax<=1000)
);
The above code gave me an error
ERROR: column "hour" does not exist
To write a time literal, you need to use the keyword time not hour:
CONSTRAINT time_check CHECK(etime > TIME '08:00:00'),
so any entry before 9:00 am not acceptable.
contradicts the 08:00:00' you have used, > TIME '08:00:00' will allow 08:00:01 (one second after 8am). If you really only want to allowed values after 9am, then use:
CONSTRAINT time_check CHECK(etime > TIME '09:00:00'),
You should also use proper ISO formatted dates to avoid any ambiguity:
CONSTRAINT date_check CHECK(edate BETWEEN DATE '2016-04-01' AND DATE '2016-04-30')
More details on the proper syntax for date and time literals can be found in the manual:
http://www.postgresql.org/docs/current/static/datatype-datetime.html#DATATYPE-DATETIME-INPUT