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全部博文（487）
发布时间：2019-02-27 09:47:30
View the Exhibit and examine the structure of the ORDERS table.The columns ORDER_MODE and ORDER_TOTAL have the default values 'direct' and 0 respectively.(SELECT order_id,order_date,customer_id FROM orders)(order_id,order_date,order_mode,VALUES(1,TO_DATE(NULL), 'online', 10.........【阅读全文】
发布时间：2019-02-26 17:05:11
Which two statements are true regarding views? (Choose two.)B) The OR REPLACE option is used to change the definition of an existing view without dropping and re-creating it.D) Rows added through a view are deleted from the table automatically when the view is dropped.F) A subquery use.........【阅读全文】
发布时间：2019-02-26 16:34:19
39.choose the best answerView the Exhibit and examine the description of the EMPLOYEES table.You want to calculate the total remuneration for each employee. Total remuneration is the sum of the annual salary and the percentage commission earned for a year.Only a few employees earn commission..........【阅读全文】
发布时间：2019-02-26 16:06:53
View the Exhibit and examine the data in the PROMOTIONS table.PROMO_BEGIN_DATE is stored in the default date format, dd-mon-rr.in the POST category that were launched before January 1, 2000.A) SELECT promo_name, promo_cost, promo_begin_dateWHERE promo_category LIKE '%post%' AND pro.........【阅读全文】
发布时间：2019-02-26 15:17:08
View the Exhibit and examine the structure of the PROMOTIONS table.Evaluate the following SQL statement:WHEN promo_cost>=(SELECT AVG(promo_cost)WHERE promo_category= 'TV')ELSE 'LOW'FROM promotions;A) It shows COST_REMARK for all the promos in the promo category 'TV' .C).........【阅读全文】
