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SQL tips

cose strane che si possono fare

contatore anche solo contatori (senza FROM)
  • SELECT nfatt=(SELECT count(Id) from FATTURE where id=100), npag=(SELECT count(Id) from PAGAMENTI where id=100)
et� in anni
  • SELECT eta=datediff(year,dnasc,getdate()) from ANAG
decodifica al volo
  • SELECT cognome, nome, citt�, provincia=(SELECT nome FROM province WHERE cod = cod_prov) from ANAG
  • SELECT cognome, nome, medico=(SELECT cognome||' '||nome FROM medici WHERE cod = cod_medico) from ANAG