Identify two situations in which the block header grows in a data block. （） when row directories need more row entries。 when there is row migration in the data block。 when there is an increase in the PCTFREE value for the data block。 when more transaction slots are required than are initially configured。
Examine the description of the CUSTOMERS table: CUSTOMER_ID NUMBER(4) NOT NULL CUSTOMER_NAME VARCHAR2(100) NOT NULL STREET_ADDRESS VARCHAR2(150) CITY_ADDRESS VARCHAR2(50) STATE_ADDRESS VARCHAR2(50) PROVINCE_ADDRESS VARCHAR2(50) COUNTRY_ADDRESS VARCHAR2(50) POSTAL_CODE VARCHAR2(12) CUSTOMER_PHONE VARCHAR2(20) The CUSTOMER_ID column is the primary key for the table. Which statement returns the city address and the number of customers in the cities Los Angeles or San Francisco?（） SELECT city_address, COUNT(*) FROM customers WHERE city _ address IN ('Los Angeles','San Fransisco');。 SELECT city_address, COUNT (*) FROM customers WHERE city address IN ( 'Los Angeles', 'San Fransisco') GROUP BY city_address;。 SELECT city_address, COUNT(customer_id) FROM customers WHERE city_address IN ( 'Los Angeles', 'San Fransisco') GROUP BY city_address, customer_ id;。 SELECT city_address, COUNT (customer_id) FROM customers GROUP BY city_ address IN ('Los Angeles','San Fransisco')。
儿童游戏中，角色扮演的发生、发展过程所遵循的途径是（） 角色认知——角色意识——角色行为。 角色行为——角色意识——角色认知。 角色认知——角色行为——角色意识。 角色行为——角色认知——角色意识。
You have configured the flash recovery area to store online redo log files， control files， archived redo logs and RMAN backups. Which of the following files can you successfully delete from the flash recovery area if you want to reclaim the space within it？（） multiplexed control files。 RMAN obsolete backups。 multiplexed online redo log files。 archived redo logs that have not been copied to tape。
20世纪40年代罗杰斯首创的，也是想象学理论模型中比较著名的心理治疗理论与方法是（） 个人中心疗法。 合理情绪疗法。 厌恶疗法。 行为疗法。
土质路堤填筑时，涵顶面填土压实厚度大于（）时，方可允许重型机械和汽车通行。
