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- 1)SELECT DATEDIFF('2019-01-21','2000-02-14')
- 2)SELECT oddzial FROM pracownicy WHERE date(data_zatrudnienia)<NOW()
- 3)SELECT YEAR(data_zatrudnienia)-2019 FROM pracownicy WHERE date(data_zatrudnienia)
- 4)SELECT CONCAT_WS("", imie, nazwisko) AS Dane
- FROM pracownicy
- 5)SELECT SUBSTR(imie, 1, 1) AS Imię, SUBSTR(nazwisko,1,1) AS Naziwsko FROM pracownicy;
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