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C list join

C#中也有String.Join 方法,可以对数据进行操作,MSDN中定义如下: 在指定 String 数组的每个元素之间串联指定的分隔符 String,从而产生单个串联的字符串。 命名空间: System程序集: mscorlib(在 mscorlib.dll 中) 语法 public static stri...

from A in DFZFORMT055 join B in FM_CODE_LIST on A.MoneyType = B.ITEM_VALUE AND B.FORM_KIND = 'DFZ.FORM.T055' AND B.FIELD_NAME= 'MoneyType' join C in JOIN FM_CODE_LIST on A.PayMentType = C.ITEM_VALUE AND C.FORM_KIND = 'DFZ.FORM....

第二种:select * from student inner join teacher on student.id=teacher.sid...select a.id,a.name,b.id,b.name,c.id,c.name from a,b,c where a....

select * from a join b on a.a=b.b join c on b.b=c.c

from A in DFZFORMT055 join B in FM_CODE_LIST on A.MoneyType = B.ITEM_VALUE AND B.FORM_KIND = 'DFZ.FORM.T055' AND B.FIELD_NAME= 'MoneyType'join C in JOIN FM_CODE_LIST on A.PayMentType = C.ITEM_VALUE AND C.FORM_KIND = 'DFZ.FORM.T...

select a.no as 学生ID,a.name as 学生名字,c.subname as 科目名称, b.score as 学生成绩 from A a left join B b on a.no = b.no left...

select t1.*, t2.*, t3.* from t1 inner join t2 on t1.联接字段 = t2.联接字段 inner join t3 on t3.联接字段 = t1或t2的联接字段 where 其他查询条件(如果有的写,没有就去掉这部分)

分inner join 、left join 、right join例:select * from 表a Inner join 表b on表a.id=表b.id inner join 表c on 表c.uid=表b.uid 注:on 后面跟条件,并不一定是id、uid,满足连接的条件即可。

所有信息,无论你使用什么关联都可以,join/ left join/right join/full join 从你写的表结构看,表D表示个A表、B表、C表的关系(除非表D还有其他三张...

#include"stdio.h" void main() { void str_link(char str1[ ],char str2[ ]); //声明str_link函数 char s1[20],s2[20]; printf("任意输入两个字符串,编写函数,实现串的连接。函数原型如下:\n"); printf("void str_link(char str1[ ],char st...

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