OCP11g+12c考试资料群:1015267481 验证码:ocp
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摘要: 不定期分享一些技术内容,欢迎感兴趣的同学参与进来。 1、PostgreSQL 12.2 备份恢复 时间:2020-03-14 20:00-21:00 内容介绍: 1.pg_dump备份以及进行选择性恢复 2.pg_dumpall备份与恢复 3.COPY备份与恢复 4.pg_basebackup与恢复 阅读全文
posted @ 2020-03-06 13:55 cnblogs_5359 阅读(249) 评论(0) 推荐(0)
摘要: 行业研究表明,认证是一个对招聘经理和应聘者个人而言都互惠共赢的利益所在。 IDC最近对Oracle培训和认证的商业价值进行了研究并发现: 获得Oracle数据库培训和认证的3年投资回报率为299% = 三年内为培训每投资1美元可提高4美元的生产力 - 点击下载该商业价值快照 获得Java培训和认证的 阅读全文
posted @ 2020-03-05 14:57 cnblogs_5359 阅读(167) 评论(0) 推荐(0)
摘要: 致广大Oracle认证(中国区)的考生们: 由于近期受疫情的影响,Pearson VUE暂时关闭了中国大陆的考试中心,并暂停至 2020 年 3 月底。 在此特殊阶段,针对无法预约并即将过期的考试券,Oracle大学将对此进行统一延期,具体解决方案如下: 如您所持有的Oracle考券尚在有效期内,我 阅读全文
posted @ 2020-03-04 14:46 cnblogs_5359 阅读(294) 评论(0) 推荐(0)
摘要: Choose two. You execute this command: TRUNCATE TABLE depts; Which two are true? A) It drops any triggers defined on the table. B) It retains the index 阅读全文
posted @ 2019-12-18 13:41 cnblogs_5359 阅读(247) 评论(0) 推荐(0)
摘要: Choose two Examine this SQL statement: DELETE FROM employees e WHERE EXISTS (SELECT 'dummy' FROM emp_history WHERE employee_id = e.employee_id) Which 阅读全文
posted @ 2019-12-17 10:39 cnblogs_5359 阅读(361) 评论(0) 推荐(1)
摘要: choose three The ORDERS table has a primary key constraint on the ORDER_ID column. The ORDER_ITEMS table has a foreign key constraint on the ORDER_ID 阅读全文
posted @ 2019-12-17 09:59 cnblogs_5359 阅读(366) 评论(0) 推荐(0)
摘要: Choose two. Which two statements are true about single row functions? A) CONCAT : can be used to combine any number of values B) MOD : returns the quo 阅读全文
posted @ 2019-12-16 15:03 cnblogs_5359 阅读(360) 评论(0) 推荐(0)
摘要: Choose two Exanine the desatption of the BOOKS_TRANSACTIONS table Name Null? Type TRANSACTION_ID NOT NULL VARCHAR2(6) TRANSACTION_TYPE VARCHAR2(3) BOR 阅读全文
posted @ 2019-12-16 13:27 cnblogs_5359 阅读(319) 评论(0) 推荐(0)
摘要: choose two. You need to calculate the number of days from 1st January 2019 until today. Dates are stored in the default format of DD-MON-RR. Which two 阅读全文
posted @ 2019-11-27 10:09 cnblogs_5359 阅读(235) 评论(0) 推荐(0)
摘要: Choose the best answer Examine the description of the PRODUCT_INFORMATION table: Name NULL? Type PROD_ID NOT NULL NUMBER(2) PROD_NANE VARCRAR2 (10) LI 阅读全文
posted @ 2019-11-27 09:44 cnblogs_5359 阅读(336) 评论(0) 推荐(0)
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