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Topic: [Solved] SQL for MS Access (Read 2434 times)
daveinhull
Sr. Member
Posts: 297
1 divided by nothing must still be 1!
[Solved] SQL for MS Access
«
on:
October 15, 2017, 02:27:08 pm »
Hi
Just wanted to say that this site is great for getting some good help - I'm really progressing on project while also gaining some good education :-)
I've got another quick (hopefully) query. The following SQL works fine in MS Access (with of course the 'ATM' changed to "ATM" and the :ID appropriately replaced)m but it doesn't work from FPC. I get zero records and then an error when trying to access a field saying, e.g. field not found "SumManYears".
Code: SQL
[Select]
[+]
[-]
SELECT
MIN
(
SH_Trained
)
AS
Trained
,
SUM
(
Stakeholders
.
SH_Management_Years
)
AS
SumManYears
,
SUM
(
Stakeholders
.
SH_Domain_Years
)
AS
SumDomainYears
,
Avg
(
Stakeholders
.
SH_Management_Years
)
AS
AvgManYears
,
Avg
(
Stakeholders
.
SH_Domain_Years
)
AS
AvgDomainYears
,
MIN
(
Stakeholders
.
SH_Management_Years
)
AS
MinManYears
,
MIN
(
Stakeholders
.
SH_Domain_Years
)
AS
MinDomainYears
,
Stakeholder_Types
.
SH_Type
,
MainData
.
ID
FROM
(
Stakeholder_Types
INNER
JOIN
Stakeholders
ON
Stakeholder_Types
.
ID
=
Stakeholders
.
T_Stakeholder_Type
)
INNER
JOIN
(
MainData
INNER
JOIN
ATMS_To_Appraisal
ON
MainData
.
ID
=
ATMS_To_Appraisal
.
T_Appraisal
)
ON
Stakeholders
.
ID
=
ATMS_To_Appraisal
.
T_ATM
GROUP
BY
Stakeholder_Types
.
SH_Type
,
MainData
.
ID
HAVING
Stakeholder_Types
.
SH_Type
=
'ATM'
AND
MainData
.
ID
=
:ID ;
Any thoughts?
Thanks
Dave
«
Last Edit: October 15, 2017, 04:11:28 pm by daveinhull
»
Logged
Version #:1.8.4 Date 2019-01-08 FPC Version: 3.0.4 and SVN Revision 57972 for x86_64-win64-win32/win64
daveinhull
Sr. Member
Posts: 297
1 divided by nothing must still be 1!
Re: SQL for MS Access
«
Reply #1 on:
October 15, 2017, 04:11:08 pm »
All sorry, a really silly error on my part
, just kept convincing myself that the SQL must be wrong and never took the time to look at other things.
I (foolishly) was using a .Exec rather than .Open on the query
Logged
Version #:1.8.4 Date 2019-01-08 FPC Version: 3.0.4 and SVN Revision 57972 for x86_64-win64-win32/win64
mangakissa
Hero Member
Posts: 1131
Re: [Solved] SQL for MS Access
«
Reply #2 on:
October 16, 2017, 09:21:55 am »
Differences:
- Open (or active) sends a query to the database and reads the result into the dataset.
- execsql sends a query, but doesn't do anything wich the results.
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Lazarus 2.06 (64b) / FPC 3.0.4 / Windows 10
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