Question

我的mysql有问题，我有这样的查询

#include <iostream>
#include <cmath>
using namespace std;
int main() {

    int n;
    float area = 0.0;
    float totalarea = 0.0;
    float dx;

    float x = 0.0;


    cout << "number of rectangles?:";
    cin >> n;
    dx = 1.0/n;
    for (int i=1; i<=n; i++){
        area = (1./n) * pow(1.0 - pow(x,2.0),0.5) ;

        totalarea += area;
        x = x + dx;
    }
    cout << totalarea << endl;

    return 0;
}

结果显示

SELECT sum(Qty) AS Qty FROM sap_rekap_bc23 
INNER JOIN masterunit_sap ON masterunit_sap.unit = sap_rekap_bc23.Unit WHERE Qty>0 AND invno='T62TJ92013' 
GROUP BY HS_Code,HS_Desc,unit_tpb,Curr,Price,invno

但是当我尝试使用我的代码（在PHP上）插入到另一个表中

Qty = 3144.6

我在$qryuraian = "SELECT sum(Qty) AS Qty FROM sap_rekap_bc23 INNER JOIN masterunit_sap ON masterunit_sap.unit = sap_rekap_bc23.Unit WHERE Qty>0 AND invno='T62TJ92013' GROUP BY HS_Code,HS_Desc,unit_tpb,Curr,Price,invno"; $listuraian = mysql_query($qryuraian,$conn); while($item=mysql_fetch_array($listuraian)) { $inserttmp = "INSERT INTO tmp_sap_rekap_bc23 (Qty) VALUES ('".$item['Qty']."')"; //mysql_query($inserttmp,$connweb); }上的Qty的结果显示tmp_sap_rekap_bc23。为什么我的数据瞬间变得四舍五入？我在3145上的桌子tmp_sap_rekap_bc23竟然是field Qty？有什么想法吗？

Answer 1

发现我的问题！！是我的错。我将Qty上的字段tmp_sap_rekap_bc23设置为225而不是0。所以我更改为0。中提琴恢复正常。

MySQL将数据插入双精度类型

1 个答案: