How to add time query in Oracle? - sql

Question

CREATE TABLE Appointment
(
appointID INTEGER,
appoint_date DATE,
appoint_time TIME,
appoint_type VARCHAR(5),
primary key (appointID)
);
INSERT INTO Appointment VALUES(1, '15-Apr-2017', '10:00', 'long');
INSERT INTO Appointment VALUES(2, '15-Apr-2017', '10:30', 'short');
INSERT INTO Appointment VALUES(3, '28-May-2017', '14:00', 'long');
INSERT INTO Appointment VALUES(4, '20-May-2017', '15:00', 'short');
INSERT INTO Appointment VALUES(5, '11-May-2017', '10:30', 'long');
INSERT INTO Appointment VALUES(6, '26-Jun-2017', '9:30', 'short');
INSERT INTO Appointment VALUES(7, '30-Jun-2017', '14:00', 'long');
INSERT INTO Appointment VALUES(8, '30-Jun-2017', '15:30', 'short');
INSERT INTO Appointment VALUES(9, '28-Apr-2017', '16:00', 'short');
INSERT INTO Appointment VALUES(10,'30-Apr-2017', '13:00', 'short');
I keep getting this error when I try to add TIME:
Error starting at line : 24 in command -
CREATE TABLE Appointment(
appointID INTEGER,
appoint_date DATE,
appoint_time TIME,
appoint_type VARCHAR(5),
primary key (appointID)
)
Error report -
ORA-00902: invalid datatype
00902. 00000 - "invalid datatype"
*Cause:
*Action:
I'm also trying to add my DOCTOR TABLE, but I keep getting a Error report
ORA-00907: missing right parenthesis
00907. 00000 - "missing right parenthesis"
*Cause:
*Action:**
create table Doctor
(
appointID INTEGER not null,
regnum CHAR(6),
doc_name VARCHAR(40),
doc_gender CHAR(1),
qual VARCHAR(80),
foreign key (appointID) references Appointment
primary key (appointID, regnum)
);

Answer 1

Here's my suggestion: avoid CHAR datatype unless it makes sense (such as in gender, as you did), as well as VARCHAR >>> use VARCHAR2 instead (personally, I never use CHAR, and have never ever used VARCHAR).
DATE datatype contains both date and time component, so you're safe if you use it.
Columns that make the primary key constraint don't have to have the NOT NULL constraint specified, because primary keys don't allow nulls anyway.
So, here it is, a working example:
SQL> create table appointment
2 (appointid integer constraint pk_app primary key,
3 appoint_date date,
4 appoint_type varchar2(5)
5 );
Table created.
SQL>
SQL> insert into appointment values
2 (1, to_date('15.04.2017 10:00', 'dd.mm.yyyy hh24:mi'), 'long');
1 row created.
SQL>
SQL> create table doctor
2 (appointid integer constraint fk_doc_app references appointment (appointid),
3 regnum varchar2(6),
4 doc_name varchar2(40),
5 doc_gender char(1),
6 qual varchar2(80),
7 --
8 constraint pk_doc primary key (appointid, regnum)
9 );
Table created.
SQL>

Answer 2

There is no data type called 'TIME', you can use timestamp :
CREATE TABLE Appointment
(
appointID INT,
appoint_date DATE,
appoint_time timestamp ,
appoint_type VARCHAR(5),
primary key (appointID)
);
For insert you have to use TO_DATE and TO_TIMESTAMP functions, as what you are inserting is string.:
INSERT INTO Appointment VALUES(3, To_date('15-Apr-2017','DD-MON-YY'), TO_TIMESTAMP('10:00','HH24:MI'), 'long');
http://sqlfiddle.com/#!4/59f5ef