多项选择题
Consider the Mysql Enterprise Audit plugin. The following event detail is found in the audit log:
Which two points can be concluded from the given event?（）
A.A connection as the user kate was successful
B.A connection failed due to authentication being unsuccessful
C.A connection was attempted via socket rather than TCP
D.A connection was blocked by a firewall or a similar security mechanism
E.A connection failed because the proxy user privileges did not match the login user
相关考题
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多项选择题
Which three statements are characteristic of the MEMORY storage engine?（）
A.It can support transactions
B.Table contents are not saved if the server is restarted
C.It cannot contain text or BLOB columns
D.It can support foreign keys
E.Each table is represented on disk as an.frm file
F.Each table has a corresponding.MYI and .MYD file -
多项选择题
Consider typical High Availability (HA) solutions that do not use shared storage. Which three HA solutions do not use shared storage?（）
A.Mysql NDB Cluster
B.Mysql Replication
C.Distributed Replicated Block Device (DRBD) and Mysql
D.Windows Cluster and Mysql
E.Solaris Cluster and Mysql -
单项选择题
Consider the query: Mysql＞ SET @run = 15; Mysql＞ EXPLAIN SELECT objective, stage, COUNT (stage) FROM iteminformation WHERE run=@run AND objective=’7.1’ GROUP BY objective,stage ORDER BY stage; The iteminformation table has the following indexes; Mysql＞ SHOW INDEXES FROM iteminformation: This query is run several times in an application with different values in the WHERE clause in a growing data set. What is the primary improvement that can be made for this scenario?（）
A.Do not pass a user variable in the WHERE clause because it limits the ability of the optimizer to use indexes
B.Add an index on the objective column so that is can be used in both the WHERE and GROUP BY operations
C.Drop the run_2 index because it has caused a conflict in the choice of key for this query
D.Execute the run_2 index because it has caused a conflict in the choice of key for this query
E.Add a composite index on (run,objective,stage) to allow the query to fully utilize an index
