Question

从VBA / SQL运行更新语句到SQL服务器时，结果如下所示..

plant   taskno  tskstatus       opened  openedby      title closed  closedby
UK      1       closed          DCR     2014-09-01   1      NULL    NULL

update语句将tskstatus从OPEN移动到CLOSED。

关闭和关闭应该= TODAYS DATE和MYNAME

但是，值不会从NULL更改。

任何人都可以解释一下我需要做些什么来改变它吗？

代码在下面..（我知道代码中有更多的COLLUMNS，我删除了一些以使文本更具可读性）

sSqlClose = "UPDATE [header] SET tskstatus = 'closed' WHERE opened = '" & ValueID & "'"
sSqlClose2 = "UPDATE [header] SET closedby = 'MYNAME' WHERE 'NULL' = '" & ValueID & "'"
sSqlClose3 = "UPDATE [header] SET closed = 'CLOSED' WHERE 'NULL' = '" & ValueID & "'"

SQLconn.Execute sSqlClose
SQLconn.Execute sSqlClose2
SQLconn.Execute sSqlClose3

由于

Answer 1

而不是：

SET closed = 'NULL'

尝试：

SET closed = NULL

您可以在一个语句中更新多个列：

update  header
set     tskstatus = 'mission accomplished'
,       closedby = 'gwbush'
,       closed = 'closed'
where   IssueID = 'WAR-ON-TERROR-12'

Answer 2

也许我不明白这个问题，但你能不能在一个声明中做这样的事情？

update header
   set tskstatus = 'closed'
      ,closed    = current_date
      ,closedby  = 'yourname'
 where tskstatus = 'open'
   and opened    = ?

Answer 3

假设您不想一次关闭所有已打开的任务，但只有一个特定的任务，并且'ValueId'包含您的TASKNUMBER，这应该有效：

sSqlClose = "UPDATE [header] SET tskstatus = 'closed', closed = 'foo', closedby = 'bar'  WHERE taskno = '" & ValueID & "'"

所有声明。

如果我的任何假设是错误的，这将无效。但是你应该提供更多信息：）

更新声明NULLS

3 个答案: