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ÒÔǰһֱ¾õµÃlinq to sqlÉú³ÉÀàËÆwhere id not in (1,3,5)»òwhere id not in (select id from ...)ÕâÑùµÄÌõ¼þ²»ÊǺܷ½±ã£¬Ã¿´ÎÎÒ¶¼ÊǰÑÌõ¼þIDÊÂÏÈÈ¡µ½Ò»¸öÊý×éÀȻºóÓà !Arr.Contains(c.Id)ÕâÑù´¦Àí£¬½ñÌìͻȻ·¢ÏÖÕâÑùºÃɵ£¬Æäʵ¿ÉÒÔÍêȫֱ½ÓÓÃlinqд³ÉÒ»¾ä£¬Ìù¸öʾÀýÔÚÕâÀÒԺ󱸲é
from a in TableA where !(from b in TableB Where ... select b.Id).Contains(a.Id)
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ORACLE PL/SQL ¶ÔÏó(object)ѧϰ±Ê¼Ç(Èý)

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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 ......

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 ......

Oracle¡¢SQL Server¡¢AccessÊý¾Ý¿â¸ßЧ¹û·ÖÒ³¼¼ÇÉ

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SQLÁ¬½ÓÀà

using System;
using System.Collections;
using System.Collections.Specialized;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using System.Runtime.InteropServices;
using System.Windows.Forms;
namespace DAL
{ ......
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