Tabulka copyemployees má sloupce: employeeid NUMBER(6) NOT NULL, firstname VARCHAR2(20) NOT NULL, lastname VARCHAR2(20) NOT NULL, email VARCHAR2(30) NOT NULL, phonenumber VARCHAR2(20) NULL, hiredate DATE NOT NULL, jobid VARCHAR2(10) NOT NULL, salary NUMBER(8,2) NOT NULL. Který INSERT správně vloží nového zaměstnance s nevyplněným telefonem?

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INSERT INTO copyemployees VALUES (502, 'Petr', 'Svoboda', 'psvoboda', '123456789', SYSDATE, 'ITPROG', 4200);

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INSERT INTO copyemployees (employeeid, firstname, lastname, phonenumber, hiredate, jobid, salary) VALUES (501, 'Jan', 'Novák', '123456789', SYSDATE, 'ITPROG', 4000);

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INSERT INTO copyemployees (employeeid, firstname, lastname, email, hiredate, jobid, salary) VALUES (503, 'Eva', 'Malá', 'emala', SYSDATE, 'STCLERK', 2500);

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INSERT INTO copyemployees (employeeid, firstname, lastname, email, phonenumber) VALUES (504, 'Karel', 'Velký', 'kvelky', '987654321');

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Tabulka copyemployees má sloupce: employeeid NUMBER(6) NOT NULL, firstname VARCH...

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