练习解答-1：简介（续） T)浏览EMPLOYEES表的结构 □I屋a□口myconnection国EMPLOYEES 酸7 Columns Datal Constraints Grants |Statistics |Trigg 围EMPLOYEE图 Z Actions.. 目EMPLOYEE_ID Column Name Data Type Nullable Dat 目FIRST-.NAME EMPLOYEE ID NUMBER(6,0) LAST-NAME FIRST_NAME VARCHAR2(20 BYTE)Yes (nu LAST_NAME VARCHAR2(25 BYTE No u HIRE DATE EMAIL VARCHAR2(25 BYTE No (nul PHONE_NUMBER VARCHAR2(20 BYTE)Yes (nul 目SALARY HIRE_DATE DATE n 目COMMISSION_PCT JOB_ID VARCHARZ(10 BYTE)No (nu 目MANAGER ID SALARY 目DEPARTMENT-.ID NUMBER(8,2) Yes (nul ☐JOB_CRADES SQL History 8)查看DEPARTMENTS表的数据 myconnection DEPARTMENTS ▣ 7 Columns Data Constraints Crants Statistics Trigg r 随昆X是晶Sort..Filter. A 国COUNTRIES 图DEPARTMENT.ID DEPARTMENT-.NAME目 DEPARTMENTS 10Administration 目DEPARTMENT_ID 2 20 Marketing 目DEPARTMENT_NAME 3 50 Shipping 目MANACER_ID 60T 目LOCATION_ID 目EMPLOYEE 80Sales 6 90 Executive 7 HISTOR 110 Accounting 190 Contracting 用LOCATIONS 【SQL History Oracle Database11g:SQL基a础1A-10 练习解答 I-1：简介（续） Oracle Database 11g：SQL 基础 I A-10 7) 浏览 EMPLOYEES 表的结构。 8) 查看 DEPARTMENTS 表的数据