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Proiect Baze de date SQL
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Baza de date a unei clinici medicale cu 4 tabele si exersarea comenzilor ALTER TABLE, INSERT, SELECT.
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By: luciveronicavasile • 3 year ago
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Prezentul proiect exemplifica comenzile si clauzele fundamentale ale bazelorde date in SQL si vine in ajutorul studentilor de la matematica si informatica
din anii I-II
1. Elaborarea un script SQL pentru crearea tabelelor bazei de date
2. Exemplificarea comenzilor de tip ALTER TABLE
3. Exemplificarea comenzilor INSERT si SELECT
4. Selectarea datelor din mai multe tabele
Tipurile de asociere: inner join, left join, right join, full join, cross join
Clauzele WHERE, HAVING, FROM si SELECT
Elaborarea un script SQL pentru crearea tabelelor bazei de date
Crearea a patru tabele cu denumirile Pacienti, Programari, Medici, respectiv
Cabinete:
CREATE TABLE Pacienti (
ID int,
Nume varchar(100),
Prenume varchar(100),
Oras varchar(100)
);
CREATE TABLE Programari (
ID int,
NumePacient varchar(100),
PrenumePacient varchar(100),
Medic varchar(100),
Data date,
Ora time(0),
Cabinet int
);
1
,CREATE TABLE Medici (
ID int,
Nume varchar(100),
Prenume varchar(100),
Cabinet int
);
CREATE TABLE Cabinete (
ID int,
Data date,
Ora time,
Oras varchar(100),
Programare bit
);
Stergerea tabelului Programari:
DROP TABLE Programari;
2
,CREATE TABLE ProgramariStomatologie (
ID int,
NumePacient varchar(100),
PrenumePacient varchar(100),
Medic varchar(100),
Data date,
Ora time(0),
Cabinet int,
Programare bit
);
CREATE TABLE ProgramariRadiografie (
ID int,
NumePacient varchar(100),
PrenumePacient varchar(100),
Medic varchar(100),
Data date,
Ora time(0),
Cabinet int,
Programare bit
);
3
, Exemplificarea comenzilor de tip ALTER TABLE
Adaugarea coloanei Oras de tip varchar in tabelul Pacienti:
ALTER TABLE Pacienti
ADD Oras varchar(100);
Redenumirea tabelului Cabinet in Cabinete:
ALTER TABLE Cabinet
RENAME TO Cabinete;
Stergerea coloanei Adresa din tabelul Pacienti:
ALTER TABLE Pacienti
DROP COLUMN Adresa;
Comenzile INSERT si SELECT
Inserarea unor valori in tabelul Pacienti:
INSERT INTO Pacienti (ID, Nume, Prenume, Oras)
VALUES ('1', 'Ilie', 'Dominic', 'Bucuresti'), ('2', 'Matei', 'Ioan', 'Bucuresti'), ('3',
'Serafim', 'Radu', 'Bucuresti');
4
,Urmatoarea comanda selecteaza toate coloanele din tabelul Pacienti:
SELECT * FROM Pacienti;
Urmatoarea comanda selecteaza coloanele ID si Oras din tabelul Cabinete:
SELECT ID, Oras
FROM Cabinete;
Selectarea datelor din mai multe tabele
Puneti in evidenta urmatoarele tipuri de asociere: inner join, left join,
right join, full join, cross join.
Urmatoarea comanda selecteaza numele medicului ce are o programare
stabilita pentru un pacient:
SELECT Nume
FROM Medici
INNER JOIN Cabinete
ON Medici.Cabinet = Cabinete.ID
WHERE Cabinete.Programare='1';
5
,Urmatoarea comanda selecteaza orasul in care exista un pacient programat in
data 2020-10-10:
SELECT Cabinete.Oras
FROM Cabinete
RIGHT JOIN Pacienti
ON Cabinete.Oras = Pacienti.Oras
WHERE Data= '2020-10-10';
Exersati utilizarea subinterogarilor utilizand tabelele din baza de date
Evidentiati plasarea subinterogarilor in clauzele WHERE, HAVING,
FROM si SELECT
CLAUZA HAVING
Urmatoarea comanda selecteaza numele medicului ce lucreaza la cabinetul
2:
SELECT Nume, Cabinet
FROM Medici
GROUP BY Cabinet
HAVING Cabinet='2';
6
, CLAUZA WHERE
Urmatoarea comanda selecteaza numele medicului ce are o programare
stabilita pentru un pacient.
SELECT Nume
FROM Medici
INNER JOIN Cabinete
ON Medici.Cabinet = Cabinete.ID
WHERE Cabinete.Programare='1';
Sa se determine pacientii care au o programare la stomatologie, dar nu au
nicio programare la radiografii.
Mai intai vom adauga datele pentru returnare in tabelul
ProgramariStomatologie:
7
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