Hi all,
I have 2 files containing Id numbers and surnames (these files
essentially contain the same data) I want to select distinct() and
join on id number to return a recordset containing every individual
listed in both the files HOWEVER, in some cases an incomplete ID
number has been collected into one of the 2 files -is there a way to
join on partial matches not just identical records in the same way as
you can select where LIKE '%blah, blah%'??
Is hash joining an option i should investigate?
TIA
Mark
4  6188 
A join expression can include any predicates, including LIKE:
....
ON A.colx LIKE B.colx+'%'
You may also find the functions CHARINDEX and PATINDEX useful (see BOL).
--
David Portas
------------
Please reply only to the newsgroup
--
"Mark" <ma**@compuchem.co.za> wrote in message
news:63**************************@posting.google.c om... Hi all,
I have 2 files containing Id numbers and surnames (these files
essentially contain the same data) I want to select distinct() and
join on id number to return a recordset containing every individual
listed in both the files HOWEVER, in some cases an incomplete ID
number has been collected into one of the 2 files -is there a way to
join on partial matches not just identical records in the same way as
you can select where LIKE '%blah, blah%'??
Is hash joining an option i should investigate?
TIA
Mark
A join expression can include any predicates, including LIKE:
....
ON A.colx LIKE B.colx+'%'
You may also find the functions CHARINDEX and PATINDEX useful (see BOL).
--
David Portas
------------
Please reply only to the newsgroup
--
"Mark" <ma**@compuchem.co.za> wrote in message
news:63**************************@posting.google.c om... Hi all,
I have 2 files containing Id numbers and surnames (these files
essentially contain the same data) I want to select distinct() and
join on id number to return a recordset containing every individual
listed in both the files HOWEVER, in some cases an incomplete ID
number has been collected into one of the 2 files -is there a way to
join on partial matches not just identical records in the same way as
you can select where LIKE '%blah, blah%'??
Is hash joining an option i should investigate?
TIA
Mark
>> I have 2 files containing Id numbers and surnames (these files
essentially contain the same data) <<
Since these are files and not tables, as you just said, why not use a
file difference utility? Now if you mean that you have tables, then
we can give you a query. Please post DDL, so that people do not have
to guess what the keys, constraints, Declarative Referential
Integrity, datatypes, etc. in your schema are. Sample data is also a
good idea, along with clear specifications -- what does "partial
match" mean?? In Full SQL-92, that is a reserved word with a definite
meaning.
>> I have 2 files containing Id numbers and surnames (these files
essentially contain the same data) <<
Since these are files and not tables, as you just said, why not use a
file difference utility? Now if you mean that you have tables, then
we can give you a query. Please post DDL, so that people do not have
to guess what the keys, constraints, Declarative Referential
Integrity, datatypes, etc. in your schema are. Sample data is also a
good idea, along with clear specifications -- what does "partial
match" mean?? In Full SQL-92, that is a reserved word with a definite
meaning.
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