Stefanescu Mihai 3 years ago SQL
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Comanda SELECT este folosita pentru a afisa informatiile stocate intr-un tabel dintr-o baza de date. Acest rezultat returnat se numeste set de rezultate (result-set).

SELECT Coloana1, Coloana2, ColoanaN FROM numeTabel;

In exemplul de mai sus vor fi afisate decat valorile coloanelor trecute in select. Daca doriti sa afisati toate datele din tabel folositi urmatoarea sintaxa:

SELECT * FROM numeTabel;


Presupunem ca avem urmatorul tabel angajati cu aceste informatii:

| ID | NUME     | VARSTA | ADRESA       | SALARIU   |
|  1 | Mihai    |    22  | Bucuresti    | 10000.00  |
|  2 | Alex     |    25  | Pitesti      |  1500.00  |
|  3 | George   |    23  | Cluj         |  2000.00  |
|  4 | Mircea   |    25  | Iasi         |  6500.00  |

Mai jos am scris o interogare ce va selecta decat coloanele ID, Nume si Salariu din tabelul angajati:


Acest cod va avea urmatorul rezultat:

| ID | NUME     |  SALARIU  |
|  1 | Mihai    | 10000.00  |
|  2 | Alex     |  1500.00  |
|  3 | George   |  2000.00  |
|  4 | Mircea   |  6500.00  |

Daca doriti sa selctati toate coloanele din tabelul angajati folositi urmatoarea interogare:

SELECT * FROM angajati;


Programator de ~8 ani, am lucrat la proiecte din mai multe industrstrii, de la eCommerce la telecomunicatii la automatizari. In acest timp am folosi diferite tehnologii, de la PHP, MySQL, PostgreSql, RabbitMq, Redis, Memcached si altele.

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