Solved

SQL-statement..

Posted on 2000-03-10
6
213 Views
Last Modified: 2010-04-04
What is wrong with the following:

  Query1.SQL.Add('SELECT * FROM DETAIL WHERE ID = :PARAM');
  Query1.ParamByName('PARAM').AsInteger:=Table1.FieldByName('ID').AsInteger;
  Query1.Open;



I get "Cannot find Parameter: Param"

Why ?

I haven't touched the properties, except for Datasource and DataBasename..
I also tried Query1.ExecSQL, but no difference..

/Thanx !
0
Comment
Question by:Erik N
6 Comments
 

Accepted Solution

by:
guntherds earned 100 total points
ID: 2605165
You must also add the PARAM-parameter to the Params-list of the query at run-time, then it will work

Gunther
0
 

Expert Comment

by:andybun
ID: 2605251
Query1.SQL.Clear;
Query1.SQL.Add('SELECT * FROM DETAIL WHERE ID = :PARAM');
  Query1.ParamByName('PARAM').AsInteger:=Table1.FieldByName('ID').AsInteger;
  Query1.Open;
0
 
LVL 27

Expert Comment

by:kretzschmar
ID: 2607492
hmm,

seems to be ok,
maybe you should give the param another name or
do a query.prepare before assigning the param like

Query1.SQL.Add('SELECT * FROM DETAIL WHERE ID = :PARAM');
Query1.Prepare;
Query1.ParamByName('PARAM').AsInteger:=Table1.FieldByName('ID').AsInteger;
Query1.Open;

meikl
0
Microsoft Certification Exam 74-409

Veeam® is happy to provide the Microsoft community with a study guide prepared by MVP and MCT, Orin Thomas. This guide will take you through each of the exam objectives, helping you to prepare for and pass the examination.

 

Expert Comment

by:sunsetyang
ID: 2607612
Perhaps the type of ID is smallint,so you should write it as Query1.ParamByName('Param').AsSmallint:=....If it doesn't work either,You can write the statement as below:
 Query1.Params[0].AsInteger(Smallint):=...
 This will work absolutely!:-)
 
0
 

Expert Comment

by:evdzwan
ID: 2608396
Just another option is not to use a parameter at all. If you already know which id you need, just used it in the query it self. It is faster.

Try :

Query1.sql.add('select * from Detail where id = ' + strToInt(Table1.FieldByName('id').asInteger))
Query1.open;

ok?
0
 

Author Comment

by:Erik N
ID: 2609256
The error was in the syntax:
SELECT * FROM DETAIL WHERE ID = : PARAM
was replaced by:
SELECT * FROM DETAIL WHERE ID = :PARAM

This seems to be a little sensitive..

Thanx, all of you !

/Erik N
0

Featured Post

The Eight Noble Truths of Backup and Recovery

How can IT departments tackle the challenges of a Big Data world? This white paper provides a roadmap to success and helps companies ensure that all their data is safe and secure, no matter if it resides on-premise with physical or virtual machines or in the cloud.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
calling Tcolordialog in dll make the form disappear 8 114
Delphi Form ownership 4 90
Delphi inherited method 6 70
DBCtrlGrid, Delphi, Scroll 8 15
Creating an auto free TStringList The TStringList is a basic and frequently used object in Delphi. On many occasions, you may want to create a temporary list, process some items in the list and be done with the list. In such cases, you have to…
Hello everybody This Article will show you how to validate number with TEdit control, What's the TEdit control? TEdit is a standard Windows edit control on a form, it allows to user to write, read and copy/paste single line of text. Usua…
Nobody understands Phishing better than an anti-spam company. That’s why we are providing Phishing Awareness Training to our customers. According to a report by Verizon, only 3% of targeted users report malicious emails to management. With compan…

831 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question