Choose two. Which two statements are true about the DUAL table? A) It can display multiple rows and columns. B) It can be accessed only by the SYS user. C) It can be accessed by any user who has the S ...

Choose three. Which three statements are true about GLOBAL TEMPORARY TABLES? A) A GLOBAL TEMPORARY TABLE cannot have PUBLIC SYNONYM. B) A GLOBAL TEMPORARY TABLE can have multiple indexes C) A GLOBAL T ...

Choose three Examine this description of the PRODUCTS table: Name NULL? TYPE PROD_ID NOT NULL VARCHAR2(6) QUANTITY ...

Choose two Which two statements are true about transactions in the Oracle Database server? A) An uncommitted transaction commits automatically if the user exits SQL*Plus B) Data Manipulation Language ...

Choose two The PRODUCT_INFORMATION table has a UNIT_PRICE column of data type NUMBER(8, 2). Evaluate this SQL statement: SELECT TO_CHAR(unit_price,'$9,999') FROM PRODUCT_INFORMATION; Which two stateme ...

Choose two Which two statements are true about the WHERE and HAVING clauses in a SELECT statement? A) The WHERE clause can be used to exclude rows after dividing them into groups B) WHERE and HAVING c ...

Choose three Examine the description of the PRODUCTS table: Name Null? Type ---------------------------------------------------------------- ...

进制： 权重：111由低到高位，权重依次为10^0,10^1,10^2; 同理：不同进制，每位的底数不同，但是计算方法相同。 二进制：2^0，2^1，2^2…… 八进制：8^0，8^1，8^2…… 十六进制：16^0，16^1，16^2…… 计算机里的 ...