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MediaPortal 1
MediaPortal 1 Talk
Synchronizing client databases
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<blockquote data-quote="Anthony Vaughan" data-source="post: 1269370" data-attributes="member: 153283"><p>I understand that, but a compound key is no good for what I need to do. I have to have an integer unique identifier that contains a number that is ordered in arrival sequence so I can guarantee that a record in a table in one database will have the same value as the equivalent record in another database. This allows me, as the code I showed you above demonstrates, to find the highest id in the To database and know that any id higher than that in the From database must be a new record. Your compound key cannot help me do that.</p><p></p><p>I can live with things as they are, but we have to accept there will be a significant performance hit by doing so. Having said that, using unique identifiers that autoincrement is standard practice in the SQL database industry - as VideoDatabaseV5.db3 demonstrates.</p><p></p><p>Tony</p></blockquote><p></p>
[QUOTE="Anthony Vaughan, post: 1269370, member: 153283"] I understand that, but a compound key is no good for what I need to do. I have to have an integer unique identifier that contains a number that is ordered in arrival sequence so I can guarantee that a record in a table in one database will have the same value as the equivalent record in another database. This allows me, as the code I showed you above demonstrates, to find the highest id in the To database and know that any id higher than that in the From database must be a new record. Your compound key cannot help me do that. I can live with things as they are, but we have to accept there will be a significant performance hit by doing so. Having said that, using unique identifiers that autoincrement is standard practice in the SQL database industry - as VideoDatabaseV5.db3 demonstrates. Tony [/QUOTE]
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