摘要：
You execute this command to drop the ITEM table, which has the primary key referred in the ORDERtable:SQL> DROP TABLE scott.item CASCADE CONSTRAINTS P 阅读全文
posted @ 2017-12-14 18:35
巴啦啦大魔王
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Which three descriptions are correct about the effects of the TRUNCATE command on a table? (Choose three.)A.The corresponding indexes for the table ar 阅读全文
posted @ 2017-12-14 18:30
巴啦啦大魔王
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View the Exhibit and examine the setting for a table. Which statement is true about the PCTFREE setting for the table?A.It sets the minimum percentage 阅读全文
posted @ 2017-12-14 18:11
巴啦啦大魔王
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You have an ORDERS table with the following structure:Name Null? Type OID NUMBER(6)ODATE DATECCODE NUMBER(6)OAMT NUMBER(10,2)The table has data in the 阅读全文
posted @ 2017-12-14 18:05
巴啦啦大魔王
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Examine the command that is used to create a table:SQL> CREATE TABLE orders ( oid NUMBER(6) PRIMARY KEY,odate DATE, ccode NUMBER (6),oamt NUMBER(10,2) 阅读全文
posted @ 2017-12-14 18:02
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You want to access employee details contained in flat files as part of the EMPLOYEE table. You plan to add a new column to the EMPLOYEE table to achie 阅读全文
posted @ 2017-12-14 17:59
巴啦啦大魔王
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You created a profile APP_USER and assigned it to the users. After a month, you decide to drop the profile.Some user sessions are currently connected 阅读全文
posted @ 2017-12-14 17:56
巴啦啦大魔王
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In your database instance, the user sessions are connected to the database server from the remote machines. You want to achieve the following for thes 阅读全文
posted @ 2017-12-14 17:53
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View the Exhibit to observe the roles assigned to the SLP_REP user. Which statement is true about the assignment of the SELECT_CATALOG_ROLE role to th 阅读全文
posted @ 2017-12-14 17:46
巴啦啦大魔王
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View the Exhibit and examine the user information. The user has been granted CONNECT and RESOURCE roles and no individual system privileges. The SL_RE 阅读全文
posted @ 2017-12-14 15:54
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You want to create a role to meet these requirements:1: The role is to be protected from unauthorized usage.2: The password of the role is not to be e 阅读全文
posted @ 2017-12-14 15:50
巴啦啦大魔王
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Examine the following steps performed on a database instance:1: The DBA grants the CREATE TABLE system privilege to the SKD user with ADMIN OPTION.2: 阅读全文
posted @ 2017-12-14 14:57
巴啦啦大魔王
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The user HR owns the EMP table. The user HR grants privileges to the user SCOTT by using this command:SQL> GRANT SELECT,INSERT,UPDATE ON emp TO scott 阅读全文
posted @ 2017-12-14 14:52
巴啦啦大魔王
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View the Exhibit and examine the privileges granted to the MGR_ROLE role. The user SKD has been granted the CONNECT and RESOURCE roles only. The datab 阅读全文
posted @ 2017-12-14 14:46
巴啦啦大魔王
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The database instance has the following parameter setting:OS_AUTHENT_PREFIX = OPS$OS_ROLES = FALSEREMOTE_OS_AUTHENT = FALSEREMOTE_OS_ROLES = FALSETIME 阅读全文
posted @ 2017-12-14 14:40
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View the Exhibit1, which shows the options that are selected to create the user SL_REP. View the Exhibit2 and examine the contents of DATABASE_PROPERT 阅读全文
posted @ 2017-12-14 14:31
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The user HR receives the following error while inserting data into the TTK table:ERROR at line 1:ORA-01653: unable to extend table HR.TTK by 128 in ta 阅读全文
posted @ 2017-12-14 14:24
巴啦啦大魔王
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You executed the following command to create a tablespace called SALES_DATA:SQL> CREATE TABLESPACE sales_data DATAFILE SIZE 100MSEGMENT SPACE MANAGEME 阅读全文
posted @ 2017-12-14 14:14
巴啦啦大魔王
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View the Exhibit. Which statements are true regarding the USERS tablespace? (Choose all that apply.)A.A bitmap is used to record free extents.B.Free e 阅读全文
posted @ 2017-12-14 13:51
巴啦啦大魔王
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View the Exhibit. You want to create a tablespace to contain objects with block size 16 KB. But while configuring thestorage you find that the block s 阅读全文
posted @ 2017-12-14 13:47
巴啦啦大魔王
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Identify three situations in which you would NOT be able to drop a tablespace. (Choose three.)A.when the tablespace is onlineB.when the tablespace has 阅读全文
posted @ 2017-12-14 13:41
巴啦啦大魔王
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Examine the commands executed in a DBA session:SQL> CREATE BIGFILE TABLESPACE MRKT2 DATAFILE '/u01/app/oracle/oradata/orcl/mrkt.dbf' size 10M LOGGING3 阅读全文
posted @ 2017-12-14 13:40
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You execute the following command to change the status of the SALES tablespace:SQL> ALTER TABLESPACE sales OFFLINE;Which statements describe the effec 阅读全文
posted @ 2017-12-14 13:32
巴啦啦大魔王
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You execute a command to resize a data file, sales.dbf, of size 200 MB in your database:ALTER DATABASE DATAFILE '/remorse/sales.dbf' RESIZE 150M;Which 阅读全文
posted @ 2017-12-14 13:27
巴啦啦大魔王
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--关联查询时爆了a.id无效然后测试了一下 --错误 select a.id, b.id, c.id from t1 a ,t2 b left join t3 c on c.id=a.id where a.id=b.id --正确 select a.id, b.id, c.id from t1 a left join t3 c on c.id=a.id , t2 b where a... 阅读全文
posted @ 2017-12-14 10:43
巴啦啦大魔王
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a、row_number() over() row_number()over(partition by col1 order by col2)表示根据col1分组，在分组内部根据col2排序，而此函数计算的值就表示每组内部排序后的顺序编号（组内连续的唯一的）。 与rownum的区别在于：使用rown 阅读全文
posted @ 2017-12-14 09:50
巴啦啦大魔王
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