数据库结构是这样的 查询出来是一个统计效果
查询出来就是 当日期为什么的时候 这一天所有数据的统计
sql = "select FScrq from TJlb "
Call OpenConn2
rs2.Open sql, cn2, 1, 1
Do While Not rs2.EOF
sql = "select sum(FScrq) as FScrq from TJlb where FScrq = ......
从数据库的数据表“用户”包含“姓名”,“密码”
让姓名显示在combobox中,用代码绑定:
Dim ds1 As New DataSet
Dim ds As New DataSet
ds = ExecuteSQL("SELECT 用户.* from 用户", ds1)
Me.Cboname.DataSource = ds.Tables(0)
......
在asp.net中,如何通过程序获取access数据库中的字段名。我的表名是固定的!
能给我完整代码吗?或是案例。。。
百度: C# access 字段名
SQL code:
select name from syscolunms where object_id=object_id('yourtablename') order by colid
//...
//1第几列
string fd_name = myDataSet.Tables["Table_ ......
and id not in (select distinct client from tb_talk where DATEDIFF('d', #"&date&"#, adddate)<=45)
这个是从tb_client中找出超过45天没有在tb_talk 有记录的数据
结果貌似是对的
但效率太低了
我想这样应该快一点
and (select 1 from em_talk where client = tb_client.id DATEDIFF('d', #&q ......
string sql = "select * from [order] where @type like '%@keyword%'";
OleDbParameter[] paras = new OleDbParameter[]
{
new OleDbParameter("@type",type),
new OleDbParameter("@keyword",keyword)
}; ......
case when
then else
end as
多表联查的例子有吗
SQL code:
select
a.id,
max(case a.name when '张三' then a.score else 0 end) as '张三' ,
max(case a.name when '李四' then a.score else 0 end) as '李四'
from
a join b
on
a.id=b.id
学习了。
SQL co ......