相关试题
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1A/m等于Oe（）
A.①0.0125 B.②80 C.③0.125 D.④104
答案
On your Oracle Database, you issue the following commands to create indexes: SQL > CREATE INDEX oe.ord_customer_ix1 ON oe.orders (customer_id, sales_rep_id) INVISIBLE; SQL> CREATE BITMAP INDEX oe.ord_customer_ix2 ON oe.orders (customer_id, sales_rep_id); Which two statements are true?（）
A.Only the ORD_CUSTOMER_IX1 index created. B.Both the indexes are updated when a row is inserted, updated, or deleted in the ORDERS table. C.Both the indexes are created: however, only ORD_CUSTOMERS_IX1 is used by the optimizer for queries on the ORDERS table. D.The ORD_CUSTOMER_IX1 index is not used by the optimizer even when the OPTIMIZER_USE_INVISIBLE_INDEXES parameters is set to true. E.Both the indexes are created and used by the optimizer for queries on the ORDERS table. F.Both the indexes are created: however, only ORD_CUSTOMERS_IX2 is used by the optimizer for queries on the ORDERS table.
答案
On your Oracle Database, you issue the following commands to create indexes: SQL > CREATE INDEX oe.ord_customer_ix1 ON oe.orders (customer_id, sales_rep_id) INVISIBLE; SQL> CREATE BITMAP INDEX oe.ord_customer_ix2 ON oe.orders (customer_id, sales_rep_id); Which two statements are true?（）
A.Only the ORD_CUSTOMER_IX1 index created. B.oth the indexes are updated when a row is inserted, updated, or deleted in the ORDERS table. C.oth the indexes are created: however, only ORD_CUSTOMERS_IX1 is used by the optimizer for queries on the ORDERS table. D.The ORD_CUSTOMER_IX1 index is not used by the optimizer even when the OPTIMIZER_USE_INVISIBLE_INDEXES parameters is set to true. E.oth the indexes are created and used by the optimizer for queries on the ORDERS table. F.oth the indexes are created: however, only ORD_CUSTOMERS_IX2 is used by the optimizer for queries on the ORDERS table.
答案
On your Oracle 12c database, you Issue the following commands to create indexes SQL > CREATE INDEX oe.ord_customer_ix1 ON oe.orders (customers_id, sales_rep_id) INVISIBLE; SQL> CREATE BITMAP INDEX oe.ord_customer_ix2 ON oe.orders (customers_id, sales_rep_id); Which two statement are correct?（）
A.Both the indexes are created; however, only the ORD_COSTOMER index is visible. B.The optimizer evaluates index access from both the Indexes before deciding on which index to use for query execution plan. C.Only the ORD_CUSTOMER_IX1 index is created. D.Only the ORD_CUSTOMER_IX2 index is created. E.Both the indexes are updated when a new row is inserted, updated, or deleted In the orders table.
答案
On your Oracle 12c database, you Issue the following commands to create indexes SQL > CREATE INDEX oe.ord_customer_ix1 ON oe.orders (customers_id, sales_rep_id) INVISIBLE; SQL> CREATE BITMAP INDEX oe.ord_customer_ix2 ON oe.orders (customers_id, sales_rep_id); Which two statement are correct?（）
A.oth the indexes are created; however, only the ORD_COSTOMER index is visible. B.The optimizer evaluates index access from both the Indexes before deciding on which index to use for query execution plan. C.Only the ORD_CUSTOMER_IX1 index is created. D.Only the ORD_CUSTOMER_IX2 index is created. E.oth the indexes are updated when a new row is inserted, updated, or deleted In the orders table.
答案
初产妇，24岁，妊娠39周，阵发性下腹痛2小时伴阴道少量流血，于1am入院待产。入院检查：宫缩间隔3〜5分钟、持续20秒、强度中。肛查：先露头，高位-2，宫口容1指，胎膜未破。7am宫口开5cm，先露头，高位0，胎膜已破，宫颈上唇略水肿。
答案
甲地（70oN，80oE）到乙地（70oN，150oE），若不考虑地形因素，最近的走法是（）
A.一直向正东方向 B.先向东南，再向东，最后向东北 C.先向东北，再向东，最后向东南 D.先向东南，再向东北
答案
aM(L)=1表示( )
答案
绘制中华人民共和国简图，并标示出120oE、105oE、90oE三条经线和30oN、40oN、23o26’N三条纬线。
答案
总体来看、发达国家能源利用效率普遍高于发展中国家，OE国家单位GP能耗仅为非OE国家的40%（）
答案
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