Subquery EXISTS NOT EXISTS ...
Dec 23, 2004
Hi guys...got a problem here....
I got a query which joins two table....
Individual
fid1
fQSname
fQSRegno
Point
fid2
fQSRegno
fQSPoint
Tables join using fQSRegno.
Scenario is
Tbl Individual contains all the members info.Tbl Point contains point given to members who attend courses. Problem is when I created a query...
Query1
fid3
fQSname
fQSRegno *from tblPoint
fQSPoint
the data shows only members who got points. Is it possible to include member who don't have point like new registred member to show in this query....
TQ
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Jul 14, 2005
I have 2 identic tables: T1 and T2 which contain only one field NR.
T1 contains the data:
1
2
3
4
5
6
7
8
9
10
11
12
T2 contains the data:
5
6
7
8
A
B
C
D
I want to select all the records found in T1, but not found in T2. So, I wrote the following SQL query:
SELECT T1.NR
FROM T1
WHERE NOT EXISTS
(select T2.NR
from T2);
Unfortunately, this query doesn`t return any record. And the strangest thing is that the query:
SELECT T1.NR
FROM T1
WHERE NOT EXISTS
(select T2.NR
from T2);
have the same effect like:
SELECT * FROM T1,
I mean it returns all the records of T1. I mention that the query was written in Access. What I have to do? Can anybody help me? What solutions do I have? I need a query, not a VBA code!
Thank you in advance!
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Oct 13, 2005
I need to make a query that only selects data that is in another query/table.
I have tried to do this using a query with IN criteria as follows.
SELECT fldOne,fldTwo,fldThree,
FROM tblOne
WHERE (((tblOne.fldOne) In (Select fldOne from tblTwo)) AND ((tblOne.fldTwo) In (Select fldTwo from tblTwo));
But that isn't working. Any ideas as to why?
I think that the answer might be using the EXISTS reserved word, but I don't know how.
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Mar 23, 2006
I have a table (tblSales) with these fields (RecDate, Code, Type, OrderCount).
I also have a linked table (lnkSales) with these fields.
Daily I append the data from the lnkSales to tblSales.
The tblSales table must have a record for each code daily.
These are the codes (01,02,05,07,09,10,15).
I need to automatically add a record for each code that wasn't appended.
For example,
lnkSales contains:
03/22/06 01 Mc 3
03/22/06 02 Mc 1
03/22/06 05 Mc 1
03/22/06 07 Mc 2
03/22/06 10 Mc 1
When appended to tblSales there is no record for code 09 or 15.
I need to add these records to tblSales
03/22/06 09 Mc 0
03/22/06 15 Mc 0
Can someone explain the best way to accomplish this?
Thanks.
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Sep 13, 2005
Hi again
How can I do an existence test on a table in my Access MDB in a script. The job is to determine if a temp table exists, and if so, then to drop the table.
What syntax would I use to accomplish this in form event code?
Thanks
EzRider
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Jul 19, 2006
Hi, I have the following problem which I hope someone can help me with:
I have a form which is used to enter data into a table. One of the fields is 'Code'. I want the form to check when data is enetered into this field is it already exists, ie if the code is already present in the 'code' field in the table, and if it is it should give a warning message, if not then continue as normal.
Any help would be greatly appreciated, thanks in advance!
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Mar 21, 2013
I have a form used to enter new contacts. I would like to insert a query or macro that would automatically to see if the name (first and last) already exists in the table to which this form is attached. If the name exists, I want to open the existing record and add information to it. If not, I want to enter the information as a new record.
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May 18, 2006
I keep getting the error message "Table TempMsysAccessObjects already exists" when I try to compact/repair my database. The only help I've found in the MS knowledge base just says to delete the table. I keep deleting it, but it keeps coming back. I've tried the decompile cmd line option, no change. Do I need to just rebuild this db, or what?
Access 2002.
Thanks for any ideas.
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Dec 12, 2005
I'm running the following line:
dbs.Execute ("DROP TABLE [tbl_No Certs]")
the problem is that sometimes the table doesn't exist... Instead of trapping the error code, is there a way I can check to see if the table exists? If it doesn't I'll simply skip this step of my code and move on.
Thanks!
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Dec 13, 2005
I have tried the attached code from a previous post http://www.access-programmers.co.uk/forums/showthread.php?t=98727&highlight=table+exists but some of the code doesn't work on Microsoft Access Project.
Does anyone have any ideas how I would amend this code so that it works?
Regards
Carly
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Jul 18, 2006
I have created a query/report that meets all necessary criteria except that it contains multiple TYPEs per employee. This isn’t an issue unless one of the TYPEs is ‘W’.
As TYPE ‘W’ supersedes all other TYPEs, any others that meet the other criteria should no longer be reflected in the query/report.
Is it possible to add criteria for this?
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Jul 31, 2006
Hi,
I have a java app connected to a MS access database. I need to run an sql command like
"drop table if exists"
You know, so it only tries to delete the table if its actually there. Im not sure how to do this with an access db.
Also what is the difference between delete and drop.
thanks v much for any help!
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Aug 9, 2006
I know this can be done i MySQL and with SQL Server but is there a way to drop the table but check if it exists first in Access before running a query ?
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Aug 24, 2006
Hi Guys,
Is it possible to find out if there is an Index on a table or not? I am using VB6 and Microsoft Access database? please don't ask y!!!
TIA
STA
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Feb 12, 2007
I have 2 tables
TKYOKUMD01 and TTOKUKMD01.
So Im supposed to get the records that aint found by this query in the TKYOKUMD01 table:
SELECT a.* FROM TKYOKUMD01 a, TTOKUKMD01 b WHERE a.KYOKUSYOCD & a.BUNSITUCD = b.KYOKUSYOCD & b.BUNSITUCD
Easy right? All I have to do is use NOT EXISTS Right? So I did, hence:
SELECT * FROM TKYOKUMD01
WHERE NOT EXISTS (SELECT a.* FROM TKYOKUMD01 a, TTOKUKMD01 b WHERE a.KYOKUSYOCD & a.BUNSITUCD = b.KYOKUSYOCD & b.BUNSITUCD)
No records returned, so maybe all is good and happy in their relationship interconnected world. So just to check I inputted 99999 for KYOKUSYOCD and 9 FOR BUNSITUCD in the TKYOKUMD01, now clearly it should appear right? Coz its there, on the blessed SQL code. BUt the I ran it, BAM, no results? Whaja...juhh...
Please please please help me with this, is there something wrong with this statement coz Im pretty sure I was right :(
Oh and I have 24,000 records in the TKYOKUMD01 table and 18,000 records on the TTOKUKMD01 table, weird eh? Every one in the 24K table is in the 18K table? Like, what I said, Whaja...juhhh....
Please help :D
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Mar 12, 2007
(hard being a rookie)
On my Form, I want to have a query look at one specific field for a number (1). If the number is found then I would like to have the query do basic subtraction on two other fields. (one from each table)
What I have so far is one unbound text box with the following,
=IIf(tblDaStrategy!DaNumber=1,(tblDaStrategy!DaTar get-tblDaReport!DaActual1))
Simply put, if one field has the number one in it, then take the other two fields and subtract (ex. 100-75) to display 25.
It's not working. I keep getting the #Name?
Update: I think I got it. I went back to square one and made a master query that contains the data from both tables. Then I bound one of the forms to the query. I updated my IIF statement and poof. It seems to be working. Now, where's the Asprin and my pillow?
Update 2: Bummer, now my magical 25 is in place but now my form is locked tight. Guess I need to consider abandoning this concept and simply producing a report with the 25 on it. Unless someone out there has a better idea.
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Jun 5, 2007
Hi, i have a simple query but for some reason it's not working.
Let me get to the point.
2 tables - table1(id,txtfield1) table2(userid, idfield)
idfield contains id so foreign key (although hasnt been set up as that yet)
Aim: select all fields from table1 where table2 doesn't contain them.
e.g if table 1 had, 5 rows containing:
1 - test
2 - test2
3 - test3
4 - test4
5 - test6
and table 2 had:
1 - 4
2 - 5
Then when the query ran, it would only pick up 1 - test, 2 - test2, 3 - test3.
Any ideas. I have tried but with no luck:
SELECT [ID], [txtfield1] FROM table1 WHERE NOT EXISTS (SELECT [idfield] FROM table2)
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Jan 10, 2008
hello all,
i've written this query and all was working fine, but.... i added the Where IN statement and no it runs really slow. i have tried using the Where exists option but couldn't get it working.
As i understand it this is probably the worst query to run on a jet database
as it contains subqueries, select Disinct and a Where statement.
any /pointers to speed it up?
thanks all
SELECT LNE_ACTUAL_COST_JOIN.Project_ID, LNE_ACTUAL_COST_JOIN.UID, SUM(LNE_ACTUAL_COST_JOIN.[10/08] ) AS ActualCost, PPE.[Plan at Prior Period End]
FROM LNE_ACTUAL_COST_JOIN RIGHT JOIN
(SELECT DISTINCT LNE_P3e_Activities.Project_ID, LNE_P3e_Activities.UID, LNE_P3e_Activities.UID_Desc, sum(Results_Cost_Next_Period_Activities.Planned_Co st) AS [Plan at Prior Period End]
FROM LNE_P3e_Activities INNER JOIN Results_Cost_Next_Period_Activities
ON (LNE_P3e_Activities.Project_ID = Results_Cost_Next_Period_Activities.Project_ID) AND (LNE_P3e_Activities.Activity_ID = Results_Cost_Next_Period_Activities.Activity_ID)
WHERE LNE_P3e_Activities.Project_ID IN
(SELECT project_ID
FROM Project_List_LNE
WHERE LNE_P3e_Activities.Project_ID = Project_List_LNE.Project_ID ) AND
((Results_Cost_Next_Period_Activities.Year)="07/08") AND ((Results_Cost_Next_Period_Activities.Period)=11)
GROUP BY LNE_P3e_Activities.UID, LNE_P3e_Activities.Project_ID, LNE_P3e_Activities.UID_Desc
)
AS PPE ON (LNE_ACTUAL_COST_JOIN.UID = PPE.UID) AND (LNE_ACTUAL_COST_JOIN.Project_ID = PPE.Project_ID)
GROUP BY LNE_ACTUAL_COST_JOIN.Project_ID, LNE_ACTUAL_COST_JOIN.UID, PPE.[Plan at Prior Period End];
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Apr 14, 2005
VB useses the FileExists funcion as follows:
object.FileExists(filespec)
Which returns true or faulse and where filespec is the file name and object is the name of a FileSystemObject.
What I need to know is what exactly a FileSystemObject is and if anyone could possibly give an example piece of code working?
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Nov 20, 2006
Hi
I have a problem where a user would enter a project code eg 113-099. I put in a list box that filters all the project codes for instance if the user enters 1 it will show all codes starting with a 1 and every additional number they enter it filters the list box to show which codes already exists! I hope this makes sense.
The problem i have is i need to check when they enter the project code that it is a unique value. The Database developer we got in didnt index this field as no duplicates allowed and as result we have large amount of duplicate project codes.
I have started to experiment with Dlookup but with no great success.
If anyone can help it would be much appreciated as i dont have much experience with access.
The field name on the form is
[forms]![projects_frm].[project_job_number] and the table which stores this information is [projects]
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Feb 1, 2006
How to delete table if exist using VBA. I know this was in forum but I can't find the answer. Please help its urgent.
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Mar 23, 2006
I have a table (tblSales) with these fields (RecDate, Code, Type, OrderCount).
I also have a linked table (lnkSales) with these fields.
Daily I append the data from the lnkSales to tblSales.
The tblSales table must have a record for each code daily.
These are the codes (01,02,05,07,09,10,15).
I need to automatically add a record for each code that wasn't appended.
For example,
lnkSales contains:
03/22/06 01 Mc 3
03/22/06 02 Mc 1
03/22/06 05 Mc 1
03/22/06 07 Mc 2
03/22/06 10 Mc 1
When appended to tblSales there is no record for code 09 or 15.
I need to add these records to tblSales
03/22/06 09 Mc 0
03/22/06 15 Mc 0
Can someone explain the best way to accomplish this?
Thanks.
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Aug 14, 2013
I have a table called 'maintable'. It has 5000 plus entries of employees with different fields. Every Employee has unique ID. One field is date of birth (dob). Normally more than one person can have the same date of birth. A form (maintable1) is created to enter data into this table.
In order to avoid duplicate entry of the same employee again with all his data, I wish to know if the same date of birth (dob) which is being entered now already exists for any employee to verify if the employee being entered is the same, if not then I can enter the data of new employee with the same date of birth.
So basically when I will enter data in a form for the dob field, if the value is the same, then a message that entry already exists, then the 'maintable' may open highlighting the same date of birth entry, so it can be verified if the same person is not entered again.
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Aug 12, 2012
Is there any way to check if a particular table already exist in MS Access Database using ACCESS VBA?
Actually I'm creating temp table on the file but I want to check if temp table already exits then need to delete before creating.
e.g. I can check if query defniniton already exists using below code:
Code:
If .DCount("[Name]", "MSysObjects", "Left([Name],1) <> '~' AND [Type] = 5 AND [Name] = '" & strTempQueryName & "' ") <> 0 Then
.DoCmd.DeleteObject acQuery, strTempQueryName
.CurrentDb.QueryDefs.Refresh
End If
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May 9, 2007
Hello
I am trying to figure out how to make my database check to see if the primary key value is a duplicate of anything ive entered previously and if yes, for my database to bring up that record instead of adding a new record.
I know how to do bring up records using a separate combobox (find) but I cant seem to do it using the primary key field itself.
Many thanks in advance.
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May 12, 2005
I have a multi table query that I am looking to retrieve a single record from
However one of these tables has multiple records for each previous record so when I run my query, I am recieving results like this
value1 value2 value3 value4
A A A 1
A A A 2
A A A 3
A A A 4
B B B 1
B B B 2
B B B 4
I have a finite number of values that value4 can equal so I would like to have my results come up like this.
value1 value2 value3 value4(1) value4(2) value4(3) value4(4)
A A A True TRUE TRUE TRUE
B B B True FALSE TRUE TRUE
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