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【单选题】
如果为下列预编译SQL的第三个问号赋值，那么正确的选项是（ ）UPDATE emp SET ename=?,job=?,salary=? WHERE empno=?
A.
pst.setInt("3",2000);
B.
pst.setInt(3,2000);
C.
pst. setFloat (“ salary ”,2000);
D.
pst. set String (“ salary ”,2000);
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