三张表几个相同的字段(别的字段不同)能否合并成一张视图?如:
tableA (AA,B,C,D,EA,FA,GA)
tableB (BA,B,C,D,EB,FB,GB)
tableC (CA,B,C,D,EC,FC,GC)如何把 B,C,D全合并到一个新视图里面? B,C,D只是对应的数据类型相同,列名不一定相同
tableA (AA,B,C,D,EA,FA,GA)
tableB (BA,B,C,D,EB,FB,GB)
tableC (CA,B,C,D,EC,FC,GC)如何把 B,C,D全合并到一个新视图里面? B,C,D只是对应的数据类型相同,列名不一定相同
2 boy1 girl1 man1 eiu eo ewtableB 1 you2 me2 she2 aaa bbb ccc
2 boy2 girl2 man2 eiu eo ewtableC 1 you3 me3 she3 aaa bbb ccc
2 boy3 girl3 man3 eiu eo ew想获得结果为:you1 me1 she1
boy1 girl1 man1
you2 me2 she2
boy2 girl2 man2
you3 me3 she3
boy3 girl3 man3
union
select * from tableB
union
select * from tableC如果字段类型相同 应该可以
union
select B,C,D from tableB
union
select B,C,D from tableC
FROM dbo.Event_List
WHERE (NewChance <> '')
UNION
SELECT OutID AS ID, AccountID, CustomerID, LinkMan, NewChance, NCState, 'o' AS ChanceType, InputTime
FROM dbo.Out_List
WHERE (NewChance <> '')
UNION
SELECT ChanceID AS ID, AccountID, 0 AS CustomerID, Linkman, NewChance, NCState, 'C' AS ChanceType, InputTime
FROM dbo.Chance_List
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用inner Join可以做到一个表返回纪录,速度要快些。<br/>select * from 主表 inner Join 从表 on 主表.外键=从表.id<br/>如果要显示上合并行,可以在客户端合并<br/> <TABLE WIDTH=75% BORDER=1 CELLSPACING=1 CELLPADDING=1 id="tb">
<TR id="row">
<TD id="td">1</TD>
<TD>a</TD>
<TD>b</TD>
</TR>
<TR>
<TD>1</TD>
<TD>c</TD>
<TD>d</TD>
</TR>
<TR>
<TD>1</TD>
<TD>c</TD>
<TD>d</TD>
</TR>
<TR>
<TD>2</TD>
<TD>e</TD>
<TD>f</TD>
</TR>
<TR>
<TD>2</TD>
<TD>e</TD>
<TD>f</TD>
</TR>
<TR>
<TD>2</TD>
<TD>e</TD>
<TD>f</TD>
</TR>
<TR>
<TD>2</TD>
<TD>e</TD>
<TD>f</TD>
</TR>
</TABLE>
<SCRIPT LANGUAGE=javascript>
var Rows=document.getElementById("tb").rows;
var Col=1;//这个是要合并的第几列;
var lastValue; for(i=0;i<Rows.length;i++)
{
lastValue=Rows[i].cells[Col-1].innerHTML;
var same=1;
while(lastValue==Rows[i+same].cells[Col-1].innerHTML )
{
Rows[i+same].removeChild(Rows[i+same].cells[Col-1]);
same+=1;
if((i+same)==Rows.length )
{
break;
}
}
Rows[i].cells[Col-1].rowSpan=same;
i=i+same-1;
}
</SCRIPT>
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