mysql数据库中有一个表(table1),它的视图如下:| id | key | value || 14 | Jim | SUS | xxxx-xx-xx |下面是我如何做到这一点的代码:
selectc.name,NULL)) as name, max(ifnull(c.location,NULL)) as location, max(ifnull(c
$query="Select studentid,firstname,lastname,pts from students where collegeid=4"; $row=mysql_fetch_array($result); $name=$row['firstname$row['lastname'];
C4:K51,"select C,G,H, K where C is not null and G > 0"),{"","","",""});IFERROR(query('PI Calcs'!C104:P127,"select C,J,K,P where C is not null and J > 0"),{"","","",""
我有一个连接多个大表的查询。我正在使用到MySQL数据库的实时数据连接。
我遇到的问题是,在向MySQL请求数据之前,它没有应用过滤条件。因此,它实质上是执行SELECT * from my query,而不是将筛选条件应用于where子句。它将所有数据从MySQL数据库拉回Tableau,然后根据我的过滤条件丢弃不需要的数据。只需从my account表中执行select来填充筛选器列表,我就可以干净利落地获得帐户
在VB.net中,直接在MySQL-client中查询SELECT id,如'123456789‘这样的选项卡,效果也很好。Dim com As New MySqlCommand
com.CommandText = "SELECT id,eh FROM tab WHERE id LIKE @com.Parameters.Add("@