A.MySQL Replication
B.Distributed Replication Block Device
C.Windows Server Failover Clustering
D.MySQL Cluster
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A.Mysqlaccess
B.Mysqldump
C.Mysqlshow
D.Mysqlslow
E.Mysqldumpslow
Review the definition of the phone_list view.
CHEATE OR REPLACE ALGORITHM=MERGE DEFINER= 'root'@localhost' SQL SECURITY DEFINER VIEW 'phone_list' AS SELECT
e . id as id 'e . first_name AS 'first_name' 'e . last_name AS 'last_name' 'coalesce ( ph1.phone_no, ' – ') AS 'office_no' 'coalesce (ph2 .phone_no, ' – ') AS 'cell_no' FROM employees e LEFT JOIN employee_phone ph1 ON ph1.emp_id = e.id AND ph1.type = 'office' LEFT JOIN employee_phone ph2 ON ph2 .emp_id = e.id AND ph2 .type = 'mobile'
The tables employees and employee_phone are InnoDB tables;
all columns are used in this view. The contents of the phone_list view are as follows: Mysql> select * from phone_list; 1 row in set (0.00 sec)
Which method can you use to change the cell_no value to '555-8888' for John Doe?（）
A.INSERT INTO employee_phone (emp_id, phone_no, type) VALUES (1, '555-8888','mobile')
B.UPDATE phone_list SET cell_name '555-8888' WHERE first_name= 'John' and last_name= 'Doe'
C.DELETE FROM phone_list WHERE first_name= 'John' and last_name= 'Doe'; INSERT INTO phone_list (first_name, last_name, office_no, cell_no) VALUES ('John' , 'Doe' , 'x1234' , '555-8888)
D.UPDATE employee_phone SET phone_no= '555-8888' where emp_id=1
You have enabled the Slow Query Log for a short period. When you process the Slow Query Log, you receive the following snip of output:
Count: 100 Time=0 .22a (22s) Lock=0.00s (0s) Rows=0.0 (0),
root[root] @localhost CREATE TABLE 't1' (id serial,id0 varchar(N) unique key,intcaoll INT (N) ,intco12 INT(N) ,intco13 INT(N) ,intco14 INT(N) ,intco15 INT(N) ,charcol1 VARVHAR(N) ,charcol2 VARCHAR(N) charcol3 VARCHAR (N) ,charcol4 VARVHAR(N) ,charcol5 VARCHAR(N) charcol6 VARCHAR (N) ,charcol7 VARVHAR(N) ,charcol8 VARCHAR(N) charcol9 VARCHAR (N) .charcol 10 VACHAR (N) )
Count: 64000 Time-0.02s (1213s) Lock=0.00s (6s) Rows=1.0 (64000),
root [root]@ localhost SELECT intocl1, intco12, intco13, intco14, intco15, intco16,intco17, intco18 ,intcol9, intcol10, charcol1, charcol2, charcol3, charcol4, charcol5, charcol6 ,charcol7, charcol8, charcol9, charcol10 FROM t1 WHERE id = 's' Count: 1 Time=0.02s (0s) Lock=0.00s (0s) Rows=1.0 (1)
agent [agent] @localhost SELECT Select_priv, Repl_client_priv, Show_db_priv, Super_priv, Process_priv FROM mysql.user WHERE CONCAT (user, 's', host) = CURRENT_USER () Count: 48000 Time=0.02s (778s) Lock=0.00 (3s) Rows=1.0 (48000),
root[root]@localhost SELECT intocl1,intcol2,intcol3, intcol4, intcol5, charcol1, charcol2, charcol3 ,charcol4, charcol5, charcol6, charcol7, charcol8, charcol9, charcol10 FROM t1 WHERE id = 's'
You want to tune the query such that it provides the greatest overall time savings. Which query will accomplish this?（）
A.CHEATE TABLE 't1' (id serial, id0 varchar (N) unique key, intcol1 INT (N) ,intcol2 INT (N), intcol3 INT(N) ,intcol4 INT(N), intcol5 INT(N), charool1 VARCHAR (N) ,charcol2 VARCHAR (N), charcol3 VARCHAR(N), charcol4 VARCHAR(N), charcol5 VARCHAR (N) ,charcol6 VARCHAR (N), charcol7 VARCHAR(N), charcol8 VARCHAR(N), charcol9 VARCHAR (N) ,charcol10 VARCHAR (N)
B.SELECT intcol1, intcol2, intcol3, intcol4, intcol5, intcol6, intcol7, intcol8, intcol9, Intcol10, intcol11, intcol12, intcol13, intcol14, intcol15, intcol16, intcol17, intcol18, intcol19, charcol10 FROM t1 WHERE id = 's'
C.SELECT Select_priv, Repl_client_priv, Show_db_priv, Super_priv, Process_priv FROM mysql.user WHERE CONCAT (user,'s', host) = CURRENT_USER()
D.SELECT intcol1, intcol2, intcol3, intcol4, intcol5, charcol1, charcol2, charcol3, charcol4, charcol5, charcol6, charcol7, charcol8, charcol9, charcol10 FROM t1 WHERE id = 's'
A.It implements High Availability by using the .NET Connector's' load balancing capabilities
B.It is shared-nothing architecture
C.It is provided by means of IP- level disk replication
D.It relies on the shared disk architecture being visible to both servers
A.When uptime is critical
B.When data must be refactored
C.When application concurrency is static
D.When data loss is unacceptable
E.When application is a single point of failure
You have forgotten the root user account password. You decide to reset the password and execute the following:
Shell＞ /etc/init.d/mysql stop
Shell＞ /etc/init.d/mysql start – skip-grant tables
Which additional argument makes this operation safer?（）
A.–skip-networking, to prohibit access from remote locations
B.–reset-grant-tables, to start the server with only the mysql database accessible
C.–read-only,to set all data to read-only except for super users
D.–old-passwords, to start Mysql to use the old password format while running without the grant tables
A.Gtid_mode must be set to AUTO during point in time recoveries
B.Mysqlbinlog ignores arguments to – exclude-gtids-it means ignore all events with GTIDs
C.The server keeps track of which GTIDs have already been executed and skips those
D.Enforce_gtid_consistency is set to ON
An existing master-slave setup is currently using a delayed replication of one hour. The master has crashed and the slave must be "rolled forward" to provide all the latest data. The SHOW SLAVE STATUS indicates the following values: RELAY_LOG_FILE =hostname-relay-bin.00004 RELAY_LOG_POS = 1383
Which command set would make the slave current?（）
A.STOP SLAVE; CHANGE MASTER TO MASTER_DELAY =0, RELAY_LOG_FILE = 'hostnamerelay- bin.00004' , RELAY_LOG_POS= 1383
B.STOP SLAVE; CHANGE MASTER TO RELAY_LOG_FILE = 'hostname-relay-bin.00004', RELAY_LOG_POS = 1383
C.STOP SLAVE; CHANGE MASTER TO MASTER_DELAY=0; START SLAVE
D.STOP SLAVE; SET GLOBAL master_delay =0; START SLAVE
A.Setting — skip-networking when remote connections are not required
B.Using the sql_mode=STRICT_SECURE after connections are established for encrypted communications
C.Setting specific GRANT privilege to limit remote authentication
D.Setting – mysql_secure_configuration to enable paranoid mode
E.Using SSL when transporting data over remote networks
A.Start the server with the – innodb_recover_options option set to FORCE
B.Start the server with the – innodb_force_recovery option set to a non-zero value
C.Start the server as usual, and then execute the REPAIR TABLE command
D.Start the server as usual, and then execute the CHECK TABLE command
最新试题
You need to replicate a table from a master to a slave. The master and slave copies of the table will have different number of columns.Which two conditions must be true?（）
You have table 'apps','userdata' on server that uses MyISAM storage engine.You want to transfer this data to server but use InnoDB engine instead. You execute the following commands: ServerB commands:Shell＞ mysqldump –u root –h server –no-data apps userdata mysql –u root –p appsShell＞ mysql –u root –p –h server –e 'ALTER TABLE 'apps','userdata' ENGINE=InnoDB;'Shell＞ mysqldump –u root –p –h server –no-create-info –order-by-primary apps userdata mysql –u root –p appsWhat effect does the – order-by-primary argument have on the mysqldump command?（）
What is true regarding InnoDB locking?（）
Which statement is true about the log-output variable?（）
You have a server that has very limited memory but has a very large table. You will use mysqldump to back up this table.Which option will ensure mysqldump will process a row at a time instead of buffering a set of rows?（）
While reviewing the MySQL error log, you see occasions where MySQL has exceeded the number of file handles allowed to it by the operating system.Which method will reduce the number of file handles in use?（）
You have taken a Logical Volume Manager (LVM) snapshot backup of a volume that contains the MySQL data directory. Why is it important to remove snapshots after completing a RAW backup in this way?（）
Which three data components are needed for point-in-time recovery?（）
Which two statements describe the behavior of the server's SQL mode?（）
A general purpose MySQL instance is configured with the following options:—log-slow-queries—long-query-time=,0001—log-slow-admin-queries—general-log—log-bin—binlog-format=STATEMENT—innodb-flush-log-at-trx-commit=1Which three statements are true（）。