Im doing a coursework on ms access on School Management System. I have a table 'tblSubject' containing fields: 'Subject ID' and 'Subject Name' . A student has the right only to choose a maximum of 8 subjects, that is , the field 'Subject ID' must have only 8 records/entries. How to do this ???????
View RepliesWill keeping your field size shorter result in a smaller MDB file?
Or does Access only use as much space as there is real data in its fields.
Way back in the dBASE III days, dBASE would pad all your "real" information with as many spaces as necessary to fill up your field. I suspect that the MDB structure is probably smarter than that.
Another question on the same topic - I believe there is a maximum number of characters in a record (4000?). Can your field sizes add up to more than 4000, as long as the actual data, all combined, never totals 4000...?
Thanks............
..dc
I'm trying to limit the amount a user can enter into a employee discount field in a table. I would like to set up a validation rule in the table to limit the discount to no greater than $0.20 or 20 cents. Anyone have any recomendations? Thanks..
View 1 Replies View RelatedIm doing a database booking system and i need to limit the amount of people to 160 per night. At the moment i have a query that sums up the bookings per date but i dont know how to then limit this column to 160.
View 2 Replies View RelatedOn My form I would like to have code to limit what can be put into a field e.g
If Me.Myfield is not = to A, B or C
then
message
"You must enter A, B or C in this field"
EndIf
Any help please ?
I'm trying to limit the funders under previous applications to ones with the same name so then when you click on one it loads that other funding application details...
Code:
SELECT [Sheet1].[ID], [Sheet1].[Funder] FROM Sheet1 WHERE [Sheet1.Funder] Like [Sheet1].[Funder] ORDER BY funder;
Code:
[Sheet1.Funder] Like '" & [Sheet1].[Funder] & "*' ORDER BY funder;
[code]...
Hi,
Probably a really simple question, but is causing me problems! I need to be able to limit the amount of characters that can be entered into a field. For text fields I can just enter the relevant field size, but can not find an equivalent for a memo field. Validation rule warns you that there are to many characters, but doesn't seem to actually limit you.
Any suggestions would be appreciated.
J
The database I am building is for Student & Alumni administration at a non-profit culinary school. In the various forms for entering student information and for defining tests and recording test scores, I would like to not have to re-select things like Class Number or Test number.
I was able to use the Test Number field as Link Master, Child in a Test Results sub-form where Test Parameters is the Master form. But I am not able to link with the Class Number, getting the error message: "The setting you entered isn't valid for this property" even though it is one of the Suggested Link Fields. The form record source is a query linking the Class Table, Test Parameters, Test Results and Students.
I noticed that I can eliminate both Class Number and Test Number from the sub-form. In the underlying query, both these fields are updated. However, the underlying Test Results table does have the Test Number but not the Class Number. While there is still a "queryable" link from the student to the Class Number, I would very much want the Class Number to be stored in the Test Results table.
Is there a way to accomplish this through the sub-form Link Master/Child property or any other/better way to inherit both the Class Number and Test Number in each Test Results record entered?
I have a query that consists of three fields. This query is then placed in a form. I would like to set the physical length of my fields because one field consists of 4 digit numbers (I want the size of this to be relatively small) and the other two field consist of categories (field that need more space so that the user may see each letter of the category) Please help.
View 1 Replies View RelatedI have a query that consists of three fields. This query is then placed in a form. I would like to set the physical length of my fields because one field consists of 4 digit numbers (I want the size of this to be relatively small) and the other two field consist of categories (field that need more space so that the user may see each letter of the category) Please help.
View 2 Replies View RelatedI've done some searches on this, and wasn't able to find an answer--just a hint that this isn't possible. So, I'm asking to be sure.
I know there is a limit to field size at 255--but is there ANY way around that?? I'm transferring a file where some fields have a lot of information, usually not more than 255, but what's there HAS to be there.
If there's no way around it, I'll just have to make an overflow field and move them manually. There have been too many changes made to the table already to start from scratch.
Can I just state... for the record.. that 255 is a stupid limit. It's stupid to HAVE a limit.. it's like Gates saying that we'll never need more then 24 or 500k or whatever the number was.
Thanks,
Siena
Is there any way of increasing a text field size to above 255?
View 3 Replies View RelatedHi.
I have a main table (with other tables related to it).
It has the 255 max number of fields. (I know... But bear with me.)
ANyway, I need to change some field's size to smaller sizes. But if I try to change them, even 1 at a time, I get the cannot do because I have too many fields defined.
Ideas???
Russ
MS documentation states that space is not reserved for unused characters in a text field. Does this mean that there is no storage penaly for having a text field 255 as opposed to 80.
On a more general note are there any tools to help calculate the size of a table?
Hi,
I have searched on this and it says: it doesn't matter as long as it's of type text. It matter if it's long integer..etc. I am not quite sure.
I wonder if default size '50 of fields' of type text occupies that size in memory even though the data in the field is not 50 chars.
Regards,
B
How to increase field size in a certain table from 10 to 50 from Database (programaticaly).
View 1 Replies View RelatedI created a table and some of the fields are shown as Memo however when I imported an Excel database some of the info was cut short in the memo fields!Some of the fields will have ten pages of typed content although it will be well spaced out.
View 1 Replies View Relatedi just wanna ask can i set a field size for a textbox so that it can be entered only a limited number a words
For example, when i set field size = 8 and want to type beautiful, it will stop at "beautifu".
is there any way to increase the size of the text field beyond the 255 character limit? I'm creating an incident report and its diffilcult to summarize an accident in less than 255 characters.
View 3 Replies View RelatedHow to change size of Label and field with out both at once, default. Access 7
View 1 Replies View Relatedhow to set the Field Size in a new Table. I need the user to be able to type in 17 characters (as in a vehicle VIN). I don't want the user to have the ability to type in anything less than 17 characters or anything more than 17 characters.
View 2 Replies View RelatedOkay,
The subject is probably confusing but I'll try to explain.
Setup:
Table1
FieldID = Number
FieldName = Text
Table2
FieldID = Number
FieldName = Text
T1_ID = Number
Relationship
Table1.FieldID 1-> * Table2.T1_ID (one to many)
Now, I'm trying to create a 3rd table that has field populated by Table1 and a field populated by Table2 but I want to limit the field populated by table2 by what is selected in the field populated by table1.
Table1:
1st
2nd
3rd
4th
Table2:
1st,January
1st,February
1st,March
2nd,April
2nd,May
2nd,June
3rd,July
3rd,August
3rd,September
4th,October
4th,November
4th,December
Table3:
Table1Field = Number, ComboBox-Source: Table1, BoundColumn=1
Table2Field = Number, ComboBox-Source: Table2, BoundColumn=1
If Table1Field = 1st then
Table2Field Will only allow January, February, or March as selections, since ONLY they are a member of the "1sr" group via the table1 list.
Is this possible, or do i have to do some run-time checking or something?
Thanks
Jaeden "Sifo Dyas" al'Raec Ruiner
I just discovered that field lengths don't influence table size because Access doesn't pad fields.
A text field with length 20 or 255 doesn't impact the size of the table, just the data in the field does.
I did a test to confirm this.
This blew me away.
So now I ask why do we specify field length for text fields?
I have a subform that shows notes entered but if there is more text in the field then you cant see it all. Can I make it so that this field will grow so the whole input is visible or can I make it so when you click on it it opens in a larger window showing all the txt?
View 1 Replies View RelatedI have this database where I want to change the field size from 9 to 4 but I want to keep the last 4 digits not the first 4 digits. Is there a way to make that change?
View 10 Replies View RelatedAccess stops me from increasing the size of a key field
Table tTrades
. Key field: idTrade: auto-number
. Field: Code: Text 10 characters
Table tData
. Key field: Code: Text 10 characters
I get an error message when I try to change either of these Code fields from size 10 to 16 characters
Error message - you cannot change the data type of field size. It is part of one or more relationships. Te change the data type of this field, first delete its relationships in the relationships window.
I deleted all relationships in the relationships window. But I still get the same error message.
If I click on relationship window > "All realtionships", Access reproduces all my relationships in the relationship window. Somehow it knows them. I deleted them all again and saved. But I still get the same error message.
I have a form ftTrades which generates automatically when I click on table tTrade and create a form.
I deleted this form ftTrades. But I still get the same error message.
How I can increase the size of this field.