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全部博文（487）
发布时间：2019-03-04 13:17:14
View the Exhibit and examine the structure of the ORDER_ITEMS and ORDERS tables.You executed the following SQL statement:FROM order_itemsNATURAL JOIN orders;A) The statement would not execute because the WHERE clause is before the NATURAL JOIN clause.C) The statement would exec.........【阅读全文】
发布时间：2019-03-04 11:28:27
Examine the command to create the BOOKS table.(book_id CHAR(6) PRIMARY KEY,publisher_id VARCHAR2(4),The BOOK_ID value 101 does not exist in the table.SQL> INSERT INTO books(BOOK_ID, TITLE, AUTHOR_ID)Which statement is true?B) It executes successfully only if NULL is explici.........【阅读全文】
发布时间：2019-03-01 14:20:17
Examine the structure and data in the PRICE_LIST table:You plan to give a discount of 25% on the product price and need to display the discount amountWhich SQL statement would give the required result?FROM PRICE_LIST;FROM PRICE_LIST;FROM PRICE LIST;FROM PRICE_LIST;(解析.........【阅读全文】
发布时间：2019-03-01 13:56:06
51、(12-10)choose the best answer:SQL> SELECT cust_id, cust_last_nameWHERE cust_credit_limit INFROM customersWhich statement is true regarding the above query if one of the values generated by the subquery is NULL?B) It produces an error.D) It executes but returns no rows..........【阅读全文】
发布时间：2019-03-01 13:14:27
Examine the structure of the MARKS table:Which two statements would execute successfully?FROM marksB) SELECT SUM(DISTINCT NVL(subject1,0)), MAX(subjectl)WHERE subjectl > subject2;FROM marksD) SELECT student_name, SUM (subjectl)WHERE student_name LIKE 'R%';(解析：C .........【阅读全文】
