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全部博文（487）
发布时间：2019-02-28 11:35:19
You need to calculate the number of days from 1st January 2007 till date.Which two SQL statements would give the required output?B) SELECT SYSDATE - TO_DATE ('01/JANUARY/2007') FROM DUAL;D) SELECT SYSDATE - TO_DATE ('01-JANUARY-2007') FROM DUAL;Answer:BD数据时，会实现隐式转换。.........【阅读全文】
发布时间：2019-02-28 10:14:47
Examine the data in the CUST_NAME column of the CUSTOMERS table.----------------------Renske LadwigJason Mallinplace of the first name as follows:-----------------------**** Manuel UrmanA) SELECT LPAD(SUBSTR(cust_name,INSTR(cust_name,' ')),LENGTH(cust_name),'*') "CUST N.........【阅读全文】
发布时间：2019-02-28 09:33:02
View the Exhibit and examine the data in the EMPLOYEES table.You want to generate a report showing the total compensation paid to each employee to date(迄今为止支付给每位员工的总补偿).SQL>SELECT ename ||' joined on '|| hiredate ||TO_CHAR(ROUND(ROUND(SYSDATE-hiredate)/365) * sal + comm).........【阅读全文】
发布时间：2019-02-27 11:42:10
View the Exhibit and examine the details of the ORDER_ITEMS table.Evaluate the following SQL statements:SELECT MAX(unit_price*quantity) "Maximum Order"Statement 2:FROM order_itemsWhich statements are true regarding the output of these SQL statements? (Choose all that apply.).........【阅读全文】
发布时间：2019-02-27 11:09:11
Which three tasks can be performed by DDL statements?B) modifying a table to prevent data that violate certain conditions from being entered in a columnD) creating multiple savepoints to enable partial rollback of a transactionAnser：BCE......【阅读全文】
