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#1
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Subform linked on blank fields doesn't find match
I have a subform with several linked fields (I have a tracking number which
is broken into several fields that I need linked). Occassionally, not all of the linked fields are occupied, but I still want them to pick up the record in the subform. Is there a way to do that? For clarification, say I have four linked fields for my tracking number: 123 ABC 456 DEF If I have a record on my main form with this number: 123 blank 456 DEF I want the subform to pick up records which match all four fields, but instead, it doesn't recognize that the blank fields are still a match. If I populate those blank fields with anything, it finds them: 123 ... 456 DEF But I don't want to have do that. Can anyone help? Thanks, =Ray= |
#2
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Subform linked on blank fields doesn't find match
When you say "blank", I assume you actually mean "Null". Due to the special
nature of Null, you cannot join on a field that's Null. Try using the Nz function in your query to convert the Null values to some value that will never occur naturally in the field, such as Nz([Field2], ""), and then join on that field. -- Doug Steele, Microsoft Access MVP http://I.Am/DougSteele (no e-mails, please!) "=Ray=" wrote in message news I have a subform with several linked fields (I have a tracking number which is broken into several fields that I need linked). Occassionally, not all of the linked fields are occupied, but I still want them to pick up the record in the subform. Is there a way to do that? For clarification, say I have four linked fields for my tracking number: 123 ABC 456 DEF If I have a record on my main form with this number: 123 blank 456 DEF I want the subform to pick up records which match all four fields, but instead, it doesn't recognize that the blank fields are still a match. If I populate those blank fields with anything, it finds them: 123 ... 456 DEF But I don't want to have do that. Can anyone help? Thanks, =Ray= |
#3
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Subform linked on blank fields doesn't find match
Yes, I mean "Null".
I don't actually have a join relationship between the fields, it's just set in the "Llink Child/Master Fields" properties. I modified the fields as you suggested with the Nz function, however, I don't know how to do that in reverse. That is, I have my query where it converts the null fields to a ".", but how do I get the form to still allow data entry, converting any null values to a period? Thanks for your help. =Ray= "Douglas J. Steele" wrote: When you say "blank", I assume you actually mean "Null". Due to the special nature of Null, you cannot join on a field that's Null. Try using the Nz function in your query to convert the Null values to some value that will never occur naturally in the field, such as Nz([Field2], ""), and then join on that field. -- Doug Steele, Microsoft Access MVP http://I.Am/DougSteele (no e-mails, please!) "=Ray=" wrote in message news I have a subform with several linked fields (I have a tracking number which is broken into several fields that I need linked). Occassionally, not all of the linked fields are occupied, but I still want them to pick up the record in the subform. Is there a way to do that? For clarification, say I have four linked fields for my tracking number: 123 ABC 456 DEF If I have a record on my main form with this number: 123 blank 456 DEF I want the subform to pick up records which match all four fields, but instead, it doesn't recognize that the blank fields are still a match. If I populate those blank fields with anything, it finds them: 123 ... 456 DEF But I don't want to have do that. Can anyone help? Thanks, =Ray= |
#4
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Subform linked on blank fields doesn't find match
Based your forms on a query that has the fields with and without the Nz
function. Use the fields with the Nz function for the LinkChildFields/LinkMasterFields, but display the fields without the Nz function so that you can update them. -- Doug Steele, Microsoft Access MVP http://I.Am/DougSteele (no e-mails, please!) "=Ray=" wrote in message ... Yes, I mean "Null". I don't actually have a join relationship between the fields, it's just set in the "Llink Child/Master Fields" properties. I modified the fields as you suggested with the Nz function, however, I don't know how to do that in reverse. That is, I have my query where it converts the null fields to a ".", but how do I get the form to still allow data entry, converting any null values to a period? Thanks for your help. =Ray= "Douglas J. Steele" wrote: When you say "blank", I assume you actually mean "Null". Due to the special nature of Null, you cannot join on a field that's Null. Try using the Nz function in your query to convert the Null values to some value that will never occur naturally in the field, such as Nz([Field2], ""), and then join on that field. -- Doug Steele, Microsoft Access MVP http://I.Am/DougSteele (no e-mails, please!) "=Ray=" wrote in message news I have a subform with several linked fields (I have a tracking number which is broken into several fields that I need linked). Occassionally, not all of the linked fields are occupied, but I still want them to pick up the record in the subform. Is there a way to do that? For clarification, say I have four linked fields for my tracking number: 123 ABC 456 DEF If I have a record on my main form with this number: 123 blank 456 DEF I want the subform to pick up records which match all four fields, but instead, it doesn't recognize that the blank fields are still a match. If I populate those blank fields with anything, it finds them: 123 ... 456 DEF But I don't want to have do that. Can anyone help? Thanks, =Ray= |
#5
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Subform linked on blank fields doesn't find match
Thank you... that works perfectly!
=Ray= "Douglas J. Steele" wrote: Based your forms on a query that has the fields with and without the Nz function. Use the fields with the Nz function for the LinkChildFields/LinkMasterFields, but display the fields without the Nz function so that you can update them. -- Doug Steele, Microsoft Access MVP http://I.Am/DougSteele (no e-mails, please!) "=Ray=" wrote in message ... Yes, I mean "Null". I don't actually have a join relationship between the fields, it's just set in the "Llink Child/Master Fields" properties. I modified the fields as you suggested with the Nz function, however, I don't know how to do that in reverse. That is, I have my query where it converts the null fields to a ".", but how do I get the form to still allow data entry, converting any null values to a period? Thanks for your help. =Ray= "Douglas J. Steele" wrote: When you say "blank", I assume you actually mean "Null". Due to the special nature of Null, you cannot join on a field that's Null. Try using the Nz function in your query to convert the Null values to some value that will never occur naturally in the field, such as Nz([Field2], ""), and then join on that field. -- Doug Steele, Microsoft Access MVP http://I.Am/DougSteele (no e-mails, please!) "=Ray=" wrote in message news I have a subform with several linked fields (I have a tracking number which is broken into several fields that I need linked). Occassionally, not all of the linked fields are occupied, but I still want them to pick up the record in the subform. Is there a way to do that? For clarification, say I have four linked fields for my tracking number: 123 ABC 456 DEF If I have a record on my main form with this number: 123 blank 456 DEF I want the subform to pick up records which match all four fields, but instead, it doesn't recognize that the blank fields are still a match. If I populate those blank fields with anything, it finds them: 123 ... 456 DEF But I don't want to have do that. Can anyone help? Thanks, =Ray= |
#6
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Subform linked on blank fields doesn't find match
Okay, now I have another problem...
I have a subform with one field from another table (Table 2), but with linked calculation fields (to fix the null problem) to the master form, but when I enter data in the subform, it tries to update the calculated fields in Table 2, and gives an error message because it can't update those fields. How can I tell it to use the data fields, as represented on the main form, when data is entered on the subform? Hopefully that makes sense. =Ray= "Douglas J. Steele" wrote: Based your forms on a query that has the fields with and without the Nz function. Use the fields with the Nz function for the LinkChildFields/LinkMasterFields, but display the fields without the Nz function so that you can update them. -- Doug Steele, Microsoft Access MVP http://I.Am/DougSteele (no e-mails, please!) "=Ray=" wrote in message ... Yes, I mean "Null". I don't actually have a join relationship between the fields, it's just set in the "Llink Child/Master Fields" properties. I modified the fields as you suggested with the Nz function, however, I don't know how to do that in reverse. That is, I have my query where it converts the null fields to a ".", but how do I get the form to still allow data entry, converting any null values to a period? Thanks for your help. =Ray= "Douglas J. Steele" wrote: When you say "blank", I assume you actually mean "Null". Due to the special nature of Null, you cannot join on a field that's Null. Try using the Nz function in your query to convert the Null values to some value that will never occur naturally in the field, such as Nz([Field2], ""), and then join on that field. -- Doug Steele, Microsoft Access MVP http://I.Am/DougSteele (no e-mails, please!) "=Ray=" wrote in message news I have a subform with several linked fields (I have a tracking number which is broken into several fields that I need linked). Occassionally, not all of the linked fields are occupied, but I still want them to pick up the record in the subform. Is there a way to do that? For clarification, say I have four linked fields for my tracking number: 123 ABC 456 DEF If I have a record on my main form with this number: 123 blank 456 DEF I want the subform to pick up records which match all four fields, but instead, it doesn't recognize that the blank fields are still a match. If I populate those blank fields with anything, it finds them: 123 ... 456 DEF But I don't want to have do that. Can anyone help? Thanks, =Ray= |
#7
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Subform linked on blank fields doesn't find match
No, it doesn't really make sense to me.
Do you have both the "live" fields and the "calculated" fields on both the form and subform? (the calculated fields don't need to be visible) -- Doug Steele, Microsoft Access MVP http://I.Am/DougSteele (no e-mails, please!) "=Ray=" wrote in message ... Okay, now I have another problem... I have a subform with one field from another table (Table 2), but with linked calculation fields (to fix the null problem) to the master form, but when I enter data in the subform, it tries to update the calculated fields in Table 2, and gives an error message because it can't update those fields. How can I tell it to use the data fields, as represented on the main form, when data is entered on the subform? Hopefully that makes sense. =Ray= "Douglas J. Steele" wrote: Based your forms on a query that has the fields with and without the Nz function. Use the fields with the Nz function for the LinkChildFields/LinkMasterFields, but display the fields without the Nz function so that you can update them. -- Doug Steele, Microsoft Access MVP http://I.Am/DougSteele (no e-mails, please!) "=Ray=" wrote in message ... Yes, I mean "Null". I don't actually have a join relationship between the fields, it's just set in the "Llink Child/Master Fields" properties. I modified the fields as you suggested with the Nz function, however, I don't know how to do that in reverse. That is, I have my query where it converts the null fields to a ".", but how do I get the form to still allow data entry, converting any null values to a period? Thanks for your help. =Ray= "Douglas J. Steele" wrote: When you say "blank", I assume you actually mean "Null". Due to the special nature of Null, you cannot join on a field that's Null. Try using the Nz function in your query to convert the Null values to some value that will never occur naturally in the field, such as Nz([Field2], ""), and then join on that field. -- Doug Steele, Microsoft Access MVP http://I.Am/DougSteele (no e-mails, please!) "=Ray=" wrote in message news I have a subform with several linked fields (I have a tracking number which is broken into several fields that I need linked). Occassionally, not all of the linked fields are occupied, but I still want them to pick up the record in the subform. Is there a way to do that? For clarification, say I have four linked fields for my tracking number: 123 ABC 456 DEF If I have a record on my main form with this number: 123 blank 456 DEF I want the subform to pick up records which match all four fields, but instead, it doesn't recognize that the blank fields are still a match. If I populate those blank fields with anything, it finds them: 123 ... 456 DEF But I don't want to have do that. Can anyone help? Thanks, =Ray= |
#8
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Subform linked on blank fields doesn't find match
I have two tables. Both tables have the several fields that make up the
tracking number, which may contain null fields. (Table 2 stores many replicates of a single type of measurement for each tracking number, while Table 1 stores several types of measurements with 1 replicate each.) I have a query for each table that adds calculated fields to correct the problem I was having with the null fields. My main form is based on the query for Table 1, and has "live" fields for data entry. The subform is based on the query for Table 2 and has only 1 field for data entry, but is linked to the main form record using the calculated fields. There are no fields from the tracking no. on the subform, live or calculated, just the one field of Table 2 that contains multiple replicates... the other fields are used for linking purposes only and are not on the form as visible or invisible text boxes. The subform does its linking properly (although I have to switch to a different record and back again for a change on the main form to be reflected in the subform). The problem is when I try to add a record by entering data on the subform, it tries to fill in data for the linked fields (the tracking no), but since they're calculated fields, it barks, saying it can't update them. I need it to fill in the appropriate tracking number (according to the main form's record) into the live fields of Table 2, but it's trying to do that for the linked, calculated fields. Well, that's the long version, but hopefully it makes it more clear what I'm doing. Thanks for your help, =Ray= "Douglas J. Steele" wrote: No, it doesn't really make sense to me. Do you have both the "live" fields and the "calculated" fields on both the form and subform? (the calculated fields don't need to be visible) -- Doug Steele, Microsoft Access MVP http://I.Am/DougSteele (no e-mails, please!) "=Ray=" wrote in message ... Okay, now I have another problem... I have a subform with one field from another table (Table 2), but with linked calculation fields (to fix the null problem) to the master form, but when I enter data in the subform, it tries to update the calculated fields in Table 2, and gives an error message because it can't update those fields. How can I tell it to use the data fields, as represented on the main form, when data is entered on the subform? Hopefully that makes sense. =Ray= "Douglas J. Steele" wrote: Based your forms on a query that has the fields with and without the Nz function. Use the fields with the Nz function for the LinkChildFields/LinkMasterFields, but display the fields without the Nz function so that you can update them. -- Doug Steele, Microsoft Access MVP http://I.Am/DougSteele (no e-mails, please!) "=Ray=" wrote in message ... Yes, I mean "Null". I don't actually have a join relationship between the fields, it's just set in the "Llink Child/Master Fields" properties. I modified the fields as you suggested with the Nz function, however, I don't know how to do that in reverse. That is, I have my query where it converts the null fields to a ".", but how do I get the form to still allow data entry, converting any null values to a period? Thanks for your help. =Ray= "Douglas J. Steele" wrote: When you say "blank", I assume you actually mean "Null". Due to the special nature of Null, you cannot join on a field that's Null. Try using the Nz function in your query to convert the Null values to some value that will never occur naturally in the field, such as Nz([Field2], ""), and then join on that field. -- Doug Steele, Microsoft Access MVP http://I.Am/DougSteele (no e-mails, please!) "=Ray=" wrote in message news I have a subform with several linked fields (I have a tracking number which is broken into several fields that I need linked). Occassionally, not all of the linked fields are occupied, but I still want them to pick up the record in the subform. Is there a way to do that? For clarification, say I have four linked fields for my tracking number: 123 ABC 456 DEF If I have a record on my main form with this number: 123 blank 456 DEF I want the subform to pick up records which match all four fields, but instead, it doesn't recognize that the blank fields are still a match. If I populate those blank fields with anything, it finds them: 123 ... 456 DEF But I don't want to have do that. Can anyone help? Thanks, =Ray= |
#9
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Subform linked on blank fields doesn't find match
Adding a record to the subform shouldn't make any difference to the parent
form, assuming that the necessary record on the parent form exists. I'm afraid I really have no suggestions. -- Doug Steele, Microsoft Access MVP http://I.Am/DougSteele (no private e-mails, please) "=Ray=" wrote in message ... I have two tables. Both tables have the several fields that make up the tracking number, which may contain null fields. (Table 2 stores many replicates of a single type of measurement for each tracking number, while Table 1 stores several types of measurements with 1 replicate each.) I have a query for each table that adds calculated fields to correct the problem I was having with the null fields. My main form is based on the query for Table 1, and has "live" fields for data entry. The subform is based on the query for Table 2 and has only 1 field for data entry, but is linked to the main form record using the calculated fields. There are no fields from the tracking no. on the subform, live or calculated, just the one field of Table 2 that contains multiple replicates... the other fields are used for linking purposes only and are not on the form as visible or invisible text boxes. The subform does its linking properly (although I have to switch to a different record and back again for a change on the main form to be reflected in the subform). The problem is when I try to add a record by entering data on the subform, it tries to fill in data for the linked fields (the tracking no), but since they're calculated fields, it barks, saying it can't update them. I need it to fill in the appropriate tracking number (according to the main form's record) into the live fields of Table 2, but it's trying to do that for the linked, calculated fields. Well, that's the long version, but hopefully it makes it more clear what I'm doing. Thanks for your help, =Ray= "Douglas J. Steele" wrote: No, it doesn't really make sense to me. Do you have both the "live" fields and the "calculated" fields on both the form and subform? (the calculated fields don't need to be visible) -- Doug Steele, Microsoft Access MVP http://I.Am/DougSteele (no e-mails, please!) "=Ray=" wrote in message ... Okay, now I have another problem... I have a subform with one field from another table (Table 2), but with linked calculation fields (to fix the null problem) to the master form, but when I enter data in the subform, it tries to update the calculated fields in Table 2, and gives an error message because it can't update those fields. How can I tell it to use the data fields, as represented on the main form, when data is entered on the subform? Hopefully that makes sense. =Ray= "Douglas J. Steele" wrote: Based your forms on a query that has the fields with and without the Nz function. Use the fields with the Nz function for the LinkChildFields/LinkMasterFields, but display the fields without the Nz function so that you can update them. -- Doug Steele, Microsoft Access MVP http://I.Am/DougSteele (no e-mails, please!) "=Ray=" wrote in message ... Yes, I mean "Null". I don't actually have a join relationship between the fields, it's just set in the "Llink Child/Master Fields" properties. I modified the fields as you suggested with the Nz function, however, I don't know how to do that in reverse. That is, I have my query where it converts the null fields to a ".", but how do I get the form to still allow data entry, converting any null values to a period? Thanks for your help. =Ray= "Douglas J. Steele" wrote: When you say "blank", I assume you actually mean "Null". Due to the special nature of Null, you cannot join on a field that's Null. Try using the Nz function in your query to convert the Null values to some value that will never occur naturally in the field, such as Nz([Field2], ""), and then join on that field. -- Doug Steele, Microsoft Access MVP http://I.Am/DougSteele (no e-mails, please!) "=Ray=" wrote in message news I have a subform with several linked fields (I have a tracking number which is broken into several fields that I need linked). Occassionally, not all of the linked fields are occupied, but I still want them to pick up the record in the subform. Is there a way to do that? For clarification, say I have four linked fields for my tracking number: 123 ABC 456 DEF If I have a record on my main form with this number: 123 blank 456 DEF I want the subform to pick up records which match all four fields, but instead, it doesn't recognize that the blank fields are still a match. If I populate those blank fields with anything, it finds them: 123 ... 456 DEF But I don't want to have do that. Can anyone help? Thanks, =Ray= |
#10
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Subform linked on blank fields doesn't find match
No, it doesn't do anything to the parent form. When I said it tries to fill
in data, I was referring to the query that the subform is based on. Since that query has several fields other than the one that is visible on the form, when I add a record by entering data into that one field, it tries to enter values for the other fields that are in the query... the ones that the subform is linked to the master form by. But since those are calculated fields, it can't enter data. I want it to enter that data, but in the corresponding "live" data entry fields. Thanks for your efforts in helping me through this... they have helped and are appreciated. =Ray= "Douglas J. Steele" wrote: Adding a record to the subform shouldn't make any difference to the parent form, assuming that the necessary record on the parent form exists. I'm afraid I really have no suggestions. -- Doug Steele, Microsoft Access MVP http://I.Am/DougSteele (no private e-mails, please) "=Ray=" wrote in message ... I have two tables. Both tables have the several fields that make up the tracking number, which may contain null fields. (Table 2 stores many replicates of a single type of measurement for each tracking number, while Table 1 stores several types of measurements with 1 replicate each.) I have a query for each table that adds calculated fields to correct the problem I was having with the null fields. My main form is based on the query for Table 1, and has "live" fields for data entry. The subform is based on the query for Table 2 and has only 1 field for data entry, but is linked to the main form record using the calculated fields. There are no fields from the tracking no. on the subform, live or calculated, just the one field of Table 2 that contains multiple replicates... the other fields are used for linking purposes only and are not on the form as visible or invisible text boxes. The subform does its linking properly (although I have to switch to a different record and back again for a change on the main form to be reflected in the subform). The problem is when I try to add a record by entering data on the subform, it tries to fill in data for the linked fields (the tracking no), but since they're calculated fields, it barks, saying it can't update them. I need it to fill in the appropriate tracking number (according to the main form's record) into the live fields of Table 2, but it's trying to do that for the linked, calculated fields. Well, that's the long version, but hopefully it makes it more clear what I'm doing. Thanks for your help, =Ray= "Douglas J. Steele" wrote: No, it doesn't really make sense to me. Do you have both the "live" fields and the "calculated" fields on both the form and subform? (the calculated fields don't need to be visible) -- Doug Steele, Microsoft Access MVP http://I.Am/DougSteele (no e-mails, please!) "=Ray=" wrote in message ... Okay, now I have another problem... I have a subform with one field from another table (Table 2), but with linked calculation fields (to fix the null problem) to the master form, but when I enter data in the subform, it tries to update the calculated fields in Table 2, and gives an error message because it can't update those fields. How can I tell it to use the data fields, as represented on the main form, when data is entered on the subform? Hopefully that makes sense. =Ray= "Douglas J. Steele" wrote: Based your forms on a query that has the fields with and without the Nz function. Use the fields with the Nz function for the LinkChildFields/LinkMasterFields, but display the fields without the Nz function so that you can update them. -- Doug Steele, Microsoft Access MVP http://I.Am/DougSteele (no e-mails, please!) "=Ray=" wrote in message ... Yes, I mean "Null". I don't actually have a join relationship between the fields, it's just set in the "Llink Child/Master Fields" properties. I modified the fields as you suggested with the Nz function, however, I don't know how to do that in reverse. That is, I have my query where it converts the null fields to a ".", but how do I get the form to still allow data entry, converting any null values to a period? Thanks for your help. =Ray= "Douglas J. Steele" wrote: When you say "blank", I assume you actually mean "Null". Due to the special nature of Null, you cannot join on a field that's Null. Try using the Nz function in your query to convert the Null values to some value that will never occur naturally in the field, such as Nz([Field2], ""), and then join on that field. -- Doug Steele, Microsoft Access MVP http://I.Am/DougSteele (no e-mails, please!) "=Ray=" wrote in message news I have a subform with several linked fields (I have a tracking number which is broken into several fields that I need linked). Occassionally, not all of the linked fields are occupied, but I still want them to pick up the record in the subform. Is there a way to do that? For clarification, say I have four linked fields for my tracking number: 123 ABC 456 DEF If I have a record on my main form with this number: 123 blank 456 DEF I want the subform to pick up records which match all four fields, but instead, it doesn't recognize that the blank fields are still a match. If I populate those blank fields with anything, it finds them: 123 ... 456 DEF But I don't want to have do that. Can anyone help? Thanks, =Ray= |
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