Consider the following: <img src="/Image1/23/23c4675b28caaa54e560af05f659df88.jpg" /> Which statement best describes the meaning of the value for the key_len column?（）<br>A:It shows the total size of the index row<br>B:It shows how many columns in the index are examined<br>C:It shows the number of characters indexed in the key<br>D:It shows how many bytes will be used from each index row

Consider the following:

Which statement best describes the meaning of the value for the key_len column?（）
A:It shows the total size of the index row
B:It shows how many columns in the index are examined
C:It shows the number of characters indexed in the key
D:It shows how many bytes will be used from each index row

出自：Oracle认证

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