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CREATE PUBLIC DATABASE LINK ASXT_LINK ;
CONNECT TO ASXT IDENTIFIED BY PASSWORD ;
USING '(DESCRIPTION =(ADDRESS_LIST =(ADDRESS =(PROTOCOL = TCP)(HOST = 192.168.0.100)(PORT = 1521)))(CONNECT_DATA =(SERVICE_NAME = AAA)))';


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RAW£¬ÀàËÆÓÚCHAR£¬ÉùÃ÷·½Ê½RAW(L)£¬LΪ³¤¶È£¬ÒÔ×Ö½ÚΪµ¥Î»£¬×÷ΪÊý¾Ý¿âÁÐ×î´ó2000£¬×÷Ϊ±äÁ¿×î´ó32767×Ö½Ú¡£
¡¡¡¡LONG RAW£¬ÀàËÆÓÚLONG£¬×÷ΪÊý¾Ý¿âÁÐ×î´ó´æ´¢2G×Ö½ÚµÄÊý¾Ý£¬×÷Ϊ±äÁ¿×î´ó32760×Ö½Ú
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¡¡¡¡create table raw_test (id number, raw_date raw(10));
¡¡¡¡²åÈërawÊý¾Ý²Ù×÷:
¡¡¡¡insert into raw ......

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DQL:Êý¾Ý¿â²éѯÓïÑÔ(select...)
DDL:Êý¾Ý¿â¶¨ÒåÓïÑÔ(create)
DML:Êý¾Ý¿â²Ù×÷ÓïÑÔ(¸üÐÂ....)
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Oracle8I   i£º»¥ÁªÍø
Oracle10g g£ºÍø¸ñ£º°Ñ¸´ÔÓµÄÎÊÌâ·Ö²¼´¦Àí£¬×îºó°Ñ½á¹û×ۺϳÉ×î×ܽá¹û
°Ñ¸´ÔÓµÄÎÊÌâ·Ö²¼´¦Àí£¬×îºó°Ñ½á¹û×Ûº ......

Oracle SpatialÖÐSDO_GeometryÏêϸ˵Ã÷

 ÔÚArcGISÖÐͨ¹ýSDE´æ´¢¿Õ¼äÊý¾Ýµ½OracleÖÐÓжàÖÖ´æ´¢·½Ê½£¬·Ö±ðÓУº¶þ½øÖÆLong Raw ¡¢ESRIµÄST_GeometryÒÔ¼°»ùÓÚOracle SpatialµÄSDO_GeometryµÈµÈ¡£
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oracleÈÕÆÚ´¦ÀíÍêÈ«°æ(תÔØ)

TO_DATE¸ñʽ
Day:
dd number 12
dy abbreviated fri
day spelled out friday
ddspth spelled out, ordinal twelfth
Month:
mm number 03
mon abbreviated mar
month spelled out march
Year:
yy two digits 98
yyyy four digits 1998
24Сʱ¸ñʽÏÂʱ¼ä·¶Î§Îª£º 0:00:00 - 23:59:59....
12Сʱ¸ ......
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