select * from pzblfx 这是从一个表里选出数据
这里放了好几年的数据,如何选出其中一月的
日期格式为2009-1-11
日期 我设成文本了。。
也可以这样理解:Select * from pzb where date="abc"
"abc"
"abce"
"abcd"是不是可以选出这三项呢?
这里放了好几年的数据,如何选出其中一月的
日期格式为2009-1-11
日期 我设成文本了。。
也可以这样理解:Select * from pzb where date="abc"
"abc"
"abce"
"abcd"是不是可以选出这三项呢?
{
public:
CMyDate();
CMyDate(int y,int m,int d);
virtual ~CMyDate();
int GetYear();
int GetMonth();
int GetDay();
CString GetStrYear();
CString GetStrMonth();
CString GetStrDay();
CString GetDate();
void SetDate(int y,int m,int d);
void SetDate(CString date);
void SetDate(CString y,CString m,CString d);
private:
int Year;
int Month;
int Day;
};
CMyDate::CMyDate(int y,int m,int d)
{
Year=y;
Month=m;
Day=d;
}CMyDate::~CMyDate()
{}
CString CMyDate::GetDate()
{
CString str;
str.Format("%d-%d-%d",Year,Month,Day);
return str;
}
int CMyDate::GetDay()
{
return Day;
}
int CMyDate::GetMonth()
{
return Month;
}
int CMyDate::GetYear()
{
return Year;
}
CString CMyDate::GetStrDay()
{
CString str;
str.Format("%d",Day);
return str;
}
CString CMyDate::GetStrMonth()
{
CString str;
str.Format("%d",Month);
return str;}
CString CMyDate::GetStrYear()
{
CString str;
str.Format("%d",Year);
return str;
}
void CMyDate::SetDate(CString date)
{
int a_1=date.Find('-',0);
int a_2=date.Find('-',5); CString y=date.Mid(0,4);
CString m=date.Mid(a_1+1,a_2-a_1);
CString d=date.Mid(a_2+1,date.GetLength()-a_2);
Year=atoi(y);
Month=atoi(m);
Day=atoi(d);
}
void CMyDate::SetDate(int y,int m,int d)
{
Year=y;
Month=m;
Day=d;
}
CMyDate::CMyDate()
{
CTime time=CTime::GetCurrentTime();
Year=time.GetYear();
Month=time.GetMonth();
Day=time.GetDay();
}void CMyDate::SetDate(CString y,CString m,CString d)
{
Year=atoi(y);
Month=atoi(m);
Day=atoi(d);
}
select * from tabel where field like '%大%'
你把你的日期先组成一个字符串,然后合到sql语句里面去
这样也出错。。
CString strConnect;
CString strDBFile="Mun.mdb";
strConnect.Format(_T("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=%s"),strDBFile);
if(pConnection->Open(_bstr_t( strConnect),"", "", 0)==S_OK)
{
// _RecordsetPtr pRecordset;
if(pRecordset.CreateInstance(__uuidof(Recordset)) != S_OK)
{
pConnection->Close();
return FALSE;
}
CString strSql;
CString str=date.GetStrYear()+_T("-")+date.GetStrMonth()+_T("-")+_T("%");
strSql=_T("select * from pzblfx where 日期 =2009-1-11 ");//+ "2007-1-11";
//+date.GetStrYear()+_T("-")+date.GetStrMonth()+_T("-")+_T("%");
HRESULT hr=pRecordset->Open(_bstr_t(strSql),pConnection.GetInterfacePtr(), adOpenStatic,
adLockOptimistic,
adCmdText);
if(hr!=S_OK)
{
pConnection->Close();
return FALSE;
}
}
strSql=_T("select * from pzblfx where 日期 like '"+date.GetStrYear()+_T("-")+date.GetStrMonth()+"%'");