… tools. To me, the definition of data warehouse is “A relational database schema which stores historical data and metadata from an operational system… of warehouses are almost always “insert only”. Data is very likely never updated or deleted in these databases and they are expected… they maintain a large historical data warehouse, but they also build data marts for OLAP analysis from the warehouse data. A different approach is…
Post: Full Text Search Webinar Questions Followup
August 24, 2012 By 5 Comments
… and deletes)? That’s a good question, because both of these external indexing technologies depend on being able to reindex as data… support changing data. One is to store two indexes, one for historical data, and the other for the “delta” of recently-changed data. Your…, not stored on disk, you are responsible for integrating new data with the on-disk Sphinx index periodically by reindexing the…
Post: Logging Foreign Key errors
September 27, 2012 By Leave a Comment
…, so we need another similar tool in order to have historical data. pt-fk-error-logger This is a tool very similar… would contain the columns as the first columns, or the data types in the referenced table do not match the ones…_1″ FOREIGN KEY (“emp_no”) REFERENCES “employees” (“emp_no”) ON DELETE CASCADE The index in the foreign key in table is…
