Oracle
1Z0-888 · Question #6
1Z0-888 Question #6: Real Exam Question with Answer & Explanation
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Question
Exhibit: mysql> EXPLAIN SELECT * FROM City Where CountryCode = 'USA'\G 1.row id: 1 select_type: SIMPLE table: City type: ALL possible_keys: NULL key: NULL key_len: NULL ref: NULL rows: 4079 Extra: Using where What does the possible_keys column in this output denote?
Options
- AA. if it is possible for you to include any indexes in your query
- BB. whether there are any indexes on the tables that you are querying
- CC. if there are any indexes that may be used to solve this query
- DD. whether there are any indexes in your query
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