I have a database that stores text (and other objects) which I would like to
categorize under multiple categories. I started out creating a "SET" field
with the different category names and I imagined being able to retrieve them
via matching on one or more categories and having this field indexed.
Or, I could also add a BIT (which I understand right now is the same as
TINYINT) field for each category and then assign 0 to rows that don't fit
that category and 1's to the categories that do fit. I would then query the
field names/categories I was looking for via the field name and a value of
1.
It seems like one downside is that to optimally do this I would then also
have to index each of these BIT fields for fast retrieval/search/match.
I'm currently looking at about 15-20 categories, but I could see it going up
to 30-40, very unlikely beyond the 64 limitation of the SET field.
However, I wanted to toss this out and get pro/cons I might be missing,
especially as use of the SET field is new to me and I don't want to start
down that path and find out it was a bad way to go. TIA,
Terry
terryRemoveThisparkeratmyselfdotcom 3 1987
Terry Parker wrote: I have a database that stores text (and other objects) which I would like to categorize under multiple categories. I started out creating a "SET" field with the different category names and I imagined being able to retrieve them via matching on one or more categories and having this field indexed.
Or, I could also add a BIT (which I understand right now is the same as TINYINT) field for each category and then assign 0 to rows that don't fit that category and 1's to the categories that do fit. I would then query the field names/categories I was looking for via the field name and a value of 1.
It seems like one downside is that to optimally do this I would then also have to index each of these BIT fields for fast retrieval/search/match.
I'm currently looking at about 15-20 categories, but I could see it going up to 30-40, very unlikely beyond the 64 limitation of the SET field.
However, I wanted to toss this out and get pro/cons I might be missing, especially as use of the SET field is new to me and I don't want to start down that path and find out it was a bad way to go. TIA,
Terry terryRemoveThisparkeratmyselfdotcom
You is going down the hard way.
Try this.
Create a table with CategoryID and CategoryName
Create another table with LinkID, MainRecordID, CategoryID and index
away on this table
Now you have a flexible system in that if you add categories you don't
have to disturb the table structure because your categories are just a
record in a table.
I personally use this a lot and find it easier than adding new fields or
messing with decoding strings etc.
Hope this helps
Regards
Justin
Terry Parker wrote: I have a database that stores text (and other objects) which I would like to categorize under multiple categories. I started out creating a "SET" field with the different category names and I imagined being able to retrieve them via matching on one or more categories and having this field indexed.
Or, I could also add a BIT (which I understand right now is the same as TINYINT) field for each category and then assign 0 to rows that don't fit that category and 1's to the categories that do fit. I would then query the field names/categories I was looking for via the field name and a value of 1.
It seems like one downside is that to optimally do this I would then also have to index each of these BIT fields for fast retrieval/search/match.
I'm currently looking at about 15-20 categories, but I could see it going up to 30-40, very unlikely beyond the 64 limitation of the SET field.
However, I wanted to toss this out and get pro/cons I might be missing, especially as use of the SET field is new to me and I don't want to start down that path and find out it was a bad way to go. TIA,
Terry terryRemoveThisparkeratmyselfdotcom
You is going down the hard way.
Try this.
Create a table with CategoryID and CategoryName
Create another table with LinkID, MainRecordID, CategoryID and index
away on this table
Now you have a flexible system in that if you add categories you don't
have to disturb the table structure because your categories are just a
record in a table.
I personally use this a lot and find it easier than adding new fields or
messing with decoding strings etc.
Hope this helps
Regards
Justin
Terry Parker wrote: I have a database that stores text (and other objects) which I would like to categorize under multiple categories. I started out creating a "SET" field with the different category names and I imagined being able to retrieve them via matching on one or more categories and having this field indexed.
Or, I could also add a BIT (which I understand right now is the same as TINYINT) field for each category and then assign 0 to rows that don't fit that category and 1's to the categories that do fit. I would then query the field names/categories I was looking for via the field name and a value of 1.
It seems like one downside is that to optimally do this I would then also have to index each of these BIT fields for fast retrieval/search/match.
I'm currently looking at about 15-20 categories, but I could see it going up to 30-40, very unlikely beyond the 64 limitation of the SET field.
However, I wanted to toss this out and get pro/cons I might be missing, especially as use of the SET field is new to me and I don't want to start down that path and find out it was a bad way to go. TIA,
Terry terryRemoveThisparkeratmyselfdotcom
You is going down the hard way.
Try this.
Create a table with CategoryID and CategoryName
Create another table with LinkID, MainRecordID, CategoryID and index
away on this table
Now you have a flexible system in that if you add categories you don't
have to disturb the table structure because your categories are just a
record in a table.
I personally use this a lot and find it easier than adding new fields or
messing with decoding strings etc.
Hope this helps
Regards
Justin This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics
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