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from a in TableA where !(from b in TableB Where ... select b.Id).Contains(a.Id)
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ORACLE PL/SQL ´¥·¢Æ÷(trigger)ѧϰ±Ê¼Ç

1¡¢´¥·¢Æ÷µÄ¸ÅÄî
´¥·¢Æ÷Ò²ÊÇÒ»ÖÖ´øÃûµÄPL/SQL¿é¡£´¥·¢Æ÷ÀàËÆÓÚ¹ý³ÌºÍº¯Êý£¬ÒòΪËüÃǶ¼ÊÇÓµÓÐÉùÃ÷¡¢Ö´ÐкÍÒì³£´¦Àí¹ý³ÌµÄ´øÃûPL/SQL¿é¡£Óë°üÀàËÆ£¬´¥·¢Æ÷±ØÐë´æ´¢ÔÚÊý¾Ý¿âÖв¢ÇÒ²»Äܱ»¿é½øÐб¾µØ»¯ÉùÃ÷¡£
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´´½¨´¥·¢Æ÷µÄÓï·¨È ......

ORACLE PL/SQL ¶ÔÏó(object)ѧϰ±Ê¼Ç(Ò»)

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CREATE [OR REPLACE] TYPE [schema.] type_name
[AUTHID {CURRENT_USER|DEFINER}] AS OBJECT (
Attribute1 datatype,
[attribute2 datatype,…]
[method 1]
[method 2]);
/

 
 
 
ÆäÖÐAUTHIDָʾ½«À´Ö´Ðи÷½·¨Ê±£¬ ......

SQLÓï¾äPART3

constraint Example:
1. grammer:
 create table [schema.]table
      (column datatype [DEFAULT expr]
     [column_constraint], ...
     [table_constraint] [,......]);
2. example of a column_level constraint:
create table empl ......

SQLÓï¾äPART4

GRANT
Name
GRANT -- ¶¨Òå·ÃÎÊȨÏÞ
Synopsis GRANT { { SELECT | INSERT | UPDATE | DELETE | RULE | REFERENCES | TRIGGER }
    [,...] | ALL [ PRIVILEGES ] }
    ON [ TABLE ] tablename [, ...]
    TO { username | GROUP groupname | PUBLIC } [, ...] [ WI ......

SQLÓï¾äPART8

PairWise subquery:
e.g.:
select * from wf_docsort where (ndocsortid,nmoduleinfoid)  in (select ndocsortid, nmoduleinfoid from wf_docsort where instr(cname,'ÎÄ')>0)
the above sql is the same function as:
select * from wf_docsort where ndocsortid = (select ndocsortid from wf_docsort where ......
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