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Common Transaction Log Failure Erros Make sure all databases in transaction log job are marked as Full backup. Make sure there is at least one successfully full database backup. Disable transaction log backup job when running a full database backup job. Back up the log Under the full recovery model or bulk-logged recovery model, if... » read more
The CROSS JOIN joined every row from the first table (T1) with every row from the second table (T2). In other words, the cross join returns a Cartesian product of rows from both tables. In general, if the first table has n rows and the second table has m rows, the cross join will result in n... » read more
SQL to retrieve content of xml file.
After creating the indexes, we should proactively know which indexes are badly used, or totally unused in order to perform the correct decision to maintain these indexes or replace it with more efficient ones. Recall that removing the unused indexes or badly indexes will improve the performance of the data modification queries, that needs to... » read more
Database administrators have to balance between creating too many indexes and too few indexes. For example, there is no need to index every column individually or involve the column in many overlapping indexes. They should also take into consideration that, the index that will enhance the performance of SELECT queries will also slow down the... » read more
A Non-clustered index is built using the same 8K-page B-tree structure that is used to build a Clustered index, except that the data and the Non-clustered index are stored separately. A Non-clustered index is different from a Clustered index in that, the underlying table rows will not be stored and sorted based on the Non-clustered... » read more