Kas järgnevad käsud väljastavad sama tulemuse (tabelis on mõlema käsu korr...
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Kas järgnevad käsud väljastavad sama tulemuse (tabelis on mõlema käsu korral samad andmed)?
SELECT left(Isikukood,1) AS arv FROM PERSONAL;
SELECT substring(Isikukood,1,1) AS arv FROM PERSONAL;
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