What does this mean?
>I have a document with 3 attributes today, and then go to production, then when I need to add 2 more attributes to the document, what will happen to my data?
>This is a pure migration problem, I need to manage my data migration, or NoSql database can create as much friction as RDBMS, or make it easier?
> SQL = Mode written by RDBMS
> NoSQL = Partial mode executed by DBMS on Write, PLUS mode is read by application program (externalized) and fully implemented
Architecture)
So when a hypothetical database-free NoSQL data storage theoretically allows you to store any data you like (usually key-value pairs in the document), without knowing the key or data type, unless you have some retrieval and The mechanism for using data. Therefore, in essence, the pattern is partly moved from the RDBMS to the application code. I said in part that you will add indexes to the document collection, or partition the data for performance, so the NoSQL DBMS will have locally defined partial modes and may be enforced by Unique constraints.
About adding additional attributes to documents/objects in the store. According to the amount of padding (unused space) around the document, in its physical data block, adding more key-value pairs to the document may cause the document to physically move to a larger continuous storage block and rebuild the relevant index. If you intend to use a new key in frequently used queries, then you will need to add a suitable new index, which obviously requires some physical storage, takes a while to build initially, and may lead you to assign sysadmin to the DBMS More memory to allow new indexes to be cached.
Unlimited is a term currently floating in the NoSql world.
What does this mean?
>I have a document with 3 attributes today, and then go to production, then when I need to add 2 more attributes to the document, what will happen to my data?
>This is a pure migration problem, I need to manage my data migration, or NoSql database can create as much friction as RDBMS, or make it easier?
No mode is a bit incorrect, it is best to think of it as:
> SQL = RDBMS written mode
> NoSQL = Part of the mode executed by the DBMS on Write, the PLUS mode is read by the application (externalized) and fully implemented
Architecture)
So when a hypothetical NoSQL data store without a database In theory, you can store any data you like (usually key-value pairs in the document) without knowing the key or data type, unless you have some mechanism for retrieving and using the data. Therefore, in essence, the pattern is partly moved from the RDBMS to the application code. I said in part that you will add indexes to the document collection, or partition the data for performance, so the NoSQL DBMS will have locally defined partial modes and may be enforced by Unique constraints.
About adding additional attributes to documents/objects in the store. According to the amount of padding (unused space) around the document, in its physical data block, adding more key-value pairs to the document may cause the document to physically move to a larger continuous storage block and rebuild the relevant index. If you intend to use a new key in frequently used queries, then you will need to add a suitable new index, which obviously requires some physical storage, takes a while to build initially, and may lead you to assign sysadmin to the DBMS More memory to allow new indexes to be cached.