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The clustered and nonclustered columnstore index has an archival compression option that further compresses the data. The archival option is useful for reducing the data size both in memory and on disk, but does slow query performance. It works well for data that is accessed infrequently. ...
Analyze cost and licensing. Every low-code platform has a license, whether it’s an open source license or a license from a commercial software vendor. Do the terms of those licenses meet your requirements? Does the cost model cover all your anticipated uses, such as for licensing development...
MySQL still does not support ‘LIMIT’ and ‘IN/ALL/ANY/SOME’ subqueries. Additionally, MySQL lacks support for several standard SQL clauses, such as ‘FULL OUTER JOINS’, ‘INTERSECT’, and ‘EXCEPT’, which are frequently used. Moreover, important index types like Partial Inde...
Shared users and grants are stored in the ndb_sql_metadata table, which ndb_restore by default does not restore in NDB 8.0; you can specify the --include-stored-grants option to cause it to do so. See Section 6.13, “Privilege Synchronization and NDB_STORED_USER”, for more information...
If you downgrade from MySQL 8.4 (or later) to a version of MySQL which does not support the FLUSH_PRIVILEGES privilege, a user previously granted this privilege is unable to execute FLUSH PRIVILEGES statements unless the user has the RELOAD privilege. ...
How does HDFS work? HDFS is built using the Java language and enables the rapid transfer of data between compute nodes. At its outset, it was closely coupled with MapReduce, a framework for data processing that filters and divides up work among the nodes in a cluster and organizes and cond...
LOGIN: Can this role be used to log in to the database server? SUPERUSER: Is this role a superuser? CREATEDB: Can this role create databases? CREATEROLE: Can this role create new roles? REPLICATION: Can this role initiate streaming replication? PASSWORD: Does this role requir...
Default methods can be added to any interface. Like the name implies, any class that implements the interface but does not override the method will get the default implementation. For example, thestreammethod in theCollectioninterface is defined something like the following: ...
Pascal Case: This convention capitalizes the first letter of each word in the identifier but does not separate them with underscores or hyphens. For example, MyVariable. Screaming Snake Case: Similar to snake case but all letters are in upper case. For example, MY_VARIABLE. ...