SQL> ed Wrote file afiedt.buf 1 create table ext_emp2 2 ( 3 employee_id, 4 last_name, 5 salary, 6 department_id 7 ) 8 organization external 9 ( 10 type oracle_datapump 11 default directory test_dir 12 location ('emp1.dat') 13 ) 14 as 15* select employee_id,last_name,salary,department_id from ext_emp1 SQL> / Table created. SQL> select * from ext_emp2; EMPLOYEE_ID LAST_NAME SALARY DEPARTMENT_ID ----------- -------------------- ---------- ------------- 198 OConnell 2600 50 199 Grant 2600 50 200 Whalen 4400 10 201 Hartstein 13000 20 202 Fay 6000 20 203 Mavris 6500 40 204 Baer 10000 70 205 Higgins 12008 110 206 Gietz 8300 110 100 King 24000 90 101 Kochhar 17000 90 EMPLOYEE_ID LAST_NAME SALARY DEPARTMENT_ID ----------- -------------------- ---------- ------------- 102 De Haan 17000 90 103 Hunold 9000 60 104 Ernst 6000 60 105 Austin 4800 60 106 Pataballa 4800 60 107 Lorentz 4200 60 108 Greenberg 12008 100 109 Faviet 9000 100 110 Chen 8200 100 111 Sciarra 7700 100 112 Urman 7800 100 EMPLOYEE_ID LAST_NAME SALARY DEPARTMENT_ID ----------- -------------------- ---------- ------------- 113 Popp 6900 100 114 Raphaely 11000 30 115 Khoo 3100 30 116 Baida 2900 30 117 Tobias 2800 30 118 Himuro 2600 30 119 Colmenares 2500 30 120 Weiss 8000 50 121 Fripp 8200 50 122 Kaufling 7900 50 123 Vollman 6500 50 EMPLOYEE_ID LAST_NAME SALARY DEPARTMENT_ID ----------- -------------------- ---------- ------------- 124 Mourgos 5800 50 125 Nayer 3200 50 126 Mikkilineni 2700 50 127 Landry 2400 50 128 Markle 2200 50 129 Bissot 3300 50 130 Atkinson 2800 50 131 Marlow 2500 50 132 Olson 2100 50 133 Mallin 3300 50 134 Rogers 2900 50 EMPLOYEE_ID LAST_NAME SALARY DEPARTMENT_ID ----------- -------------------- ---------- ------------- 135 Gee 2400 50 136 Philtanker 2200 50 137 Ladwig 3600 50 138 Stiles 3200 50 139 Seo 2700 50 140 Patel 2500 50 141 Rajs 3500 50 142 Davies 3100 50 143 Matos 2600 50 144 Vargas 2500 50 145 Russell 14000 80 EMPLOYEE_ID LAST_NAME SALARY DEPARTMENT_ID ----------- -------------------- ---------- ------------- 146 Partners 13500 80 147 Errazuriz 12000 80 148 Cambrault 11000 80 149 Zlotkey 10500 80 150 Tucker 10000 80 151 Bernstein 9500 80 152 Hall 9000 80 153 Olsen 8000 80 154 Cambrault 7500 80 155 Tuvault 7000 80 156 King 10000 80 EMPLOYEE_ID LAST_NAME SALARY DEPARTMENT_ID ----------- -------------------- ---------- ------------- 157 Sully 9500 80 158 McEwen 9000 80 159 Smith 8000 80 160 Doran 7500 80 161 Sewall 7000 80 162 Vishney 10500 80 163 Greene 9500 80 164 Marvins 7200 80 165 Lee 6800 80 166 Ande 6400 80 167 Banda 6200 80 EMPLOYEE_ID LAST_NAME SALARY DEPARTMENT_ID ----------- -------------------- ---------- ------------- 168 Ozer 11500 80 169 Bloom 10000 80 170 Fox 9600 80 171 Smith 7400 80 172 Bates 7300 80 173 Kumar 6100 80 174 Abel 11000 80 175 Hutton 8800 80 176 Taylor 8600 80 177 Livingston 8400 80 179 Johnson 6200 80 EMPLOYEE_ID LAST_NAME SALARY DEPARTMENT_ID ----------- -------------------- ---------- ------------- 180 Taylor 3200 50 181 Fleaur 3100 50 182 Sullivan 2500 50 183 Geoni 2800 50 184 Sarchand 4200 50 185 Bull 4100 50 186 Dellinger 3400 50 187 Cabrio 3000 50 188 Chung 3800 50 189 Dilly 3600 50 190 Gates 2900 50 EMPLOYEE_ID LAST_NAME SALARY DEPARTMENT_ID ----------- -------------------- ---------- ------------- 191 Perkins 2500 50 192 Bell 4000 50 193 Everett 3900 50 194 McCain 3200 50 195 Jones 2800 50 196 Walsh 3100 50 197 Feeney 3000 50 106 rows selected.
备注说明：不管是通过oracle_pump引擎创建外部表 ，还是通过Oracle_loader引擎创建的外部表，我们都可以当做正常表对其进行操作，不过这个操作是有限制要求的.不能对其进行DML操作,仅限于普通查询，构建复杂查询或者移动数据的操作.