我有下面的代码,它用错误- SQL命令编译,没有正确结束,在插入标记后创建或替换触发器trg_bc,为每一行声明sumMarks int;noCMarks int;
begin
select nbrMarks into noCMarks from Course where idC = :new.idC;
select count(idC) from Marks where idStd = :new.idStd and idC = :new.idC;
if (noCMarks = Marks) then
select sum(Mar
当我运行我的应用程序并通过菜单调用某个对话框时,我会得到一个"Debug断言失败!“弹出和调试器中的下列错误消息:
"f:\dd\vctools\vc7libs\ship\atlmfc\src\mfc\dlgdata.cpp(39) : AppMsg - Error: no data exchange control with ID 0x040E.
造成这种情况的原因是:
DDX_Control(pDX, IDC_NEWPLAYERHEIGHTINCHES, m_newPlayerHeightInchesEdit);
ID 0x040E (十进制1038)实际上是存在的:Res
下面的查询只需要很长的时间,下面的谓词只用于获取唯一的记录,因此想知道是否有不同的方法可以重写相同的查询而不多次调用下面的谓词,以获得唯一的ID。
select max(c.id) from plocation c where c.ids = y.ids and c.idc = y.idc)
select max(cr.id) from plocation_log cr where cr.ids = yt.ids and cr.idc = yt.idc)
select max(pr.id) from patentpr where pr.ids = p.ids and pr.idc = p.id
我有一个有许多按钮的对话框。单击其中任何一个都会创建一个基于单个模板的“子”对话框(如果这是正确的话.资源文件中的单个子对话框定义和ID )。
例如,从父对话框的对话框过程中:
case WM_COMMAND:
switch (LOWORD(wparam)) {
case IDC_MAPBUT1:
case IDC_MAPBUT2:
case IDC_MAPBUT3:
case IDC_MAPBUT4:
case IDC_MAPBUT5:
case IDC_MAPBUT6:
我有三个表,我想要一个查询,te,选择老师的名字和每个老师保留的班级数。
教师:
| idt | name |
类:
| idc | name |
储备金:
| idc | idt |
我的问题是:
select
t.name, count(distinct(r.idc))
from
teacher t
join
reserve r
on
r.idt = t.idt
join
class c
on
c.idc = r.idc
group by r.idc
当我运行这个程序时,我会得到以下错误:not a group by expression.
我有三张桌子A,B,C
Table A (
idA1 int unsigned not null,
idA2 int unsigned not null,
primary key(idA1, idA2)
)
Table B (
idB1 varchar(36) not null,
primary key(idB1)
)
Table C (
idC1 int unsigned not null,
idC2 varchar(36) not null,
idC3 int unsigned not null,
primary key(idC1, idC2, idC3),
foreign key(i
基本上,我想插入到表中,从同一个表中获取值id,如下所示
$sql = ("INSERT INTO commande (idfichecmd,idproduit,idclt,qte,datecmd)
(SELECT MAX(idfichecmd)+1 ,'1' AS idproduit ,'$idC' AS idclt ,'$fb' AS qte,'$date' FROM commande),
(SELECT MAX(idfichecmd) ,'2' AS idproduit ,'$idC'
我有一个问题,我创建了一个有点复杂的存储过程,这是代码:
SELECT TOP (25)
[Project1].[IDC_IDCONTACT] AS [IDC_IDCONTACT],
[Project1].[C1] AS [C1],
[Project1].[C2] AS [C2],
[Project1].[ICP_PRENOM] AS [ICP_PRENOM],
[Project1].[IDC_NOSOC] AS [IDC_NOSOC],
[Project1].[C3] AS [C3],
[Project1].[C4] AS
我只是安装了elasticsearch,但是当我尝试启动时就不起作用了。有人知道我能做什么吗?
sudo journalctl --unit elasticsearch
-- Logs begin at Sat 2020-08-29 09:54:58 UTC, end at Sat 2020-08-29 13:15:35 UTC. --
Aug 29 10:10:28 meriadoc.dallas-idc.com systemd[1]: Starting Elasticsearch...
Aug 29 10:10:35 meriadoc.dallas-idc.com systemd-ent