Note: The database name cannot be the same as an existing data source name (DSN).
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Typically, the only situation for which you would choose not to create DDF files is when you have an unnamed legacy database for which DDFs already exist, and you are now creating a database name for that database. Under these circumstances, the database engine links the new database name with the preexisting DDFs.
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SQL Grammar Support in ODBC Guide
System Tables in SQL Engine Reference
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For ODBC access, you must set up a data source name (DSN) to refer to the database name. By default, the name of the new DSN is the same as the Database Name. Multiple DSNs may point to the same named database.
Note: The DSN that you are creating is a 32-bit Engine DSN. PCC cannot create 64-bit DSNs.
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DSN Setup and Connection Strings in ODBC Guide
Automatic in ODBC Guide
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