Track source dates when loading a data warehouse
A primer on how to reduce network and source system load when reading a relational source into the data warehouse.
2012-07-30
5,986 reads
A primer on how to reduce network and source system load when reading a relational source into the data warehouse.
2012-07-30
5,986 reads
Data warehouse loads can be time consuming - this method can be used in some instances to help speed things up.
2010-04-14
16,988 reads
Initial analysis of a new source system can be quite time consuming to manually examine tables and columns to determine which even have worthwhile values in the first place. Running this script against the current database will generate useful information for all the columns of all the tables. Details include data types with varchar lengths, […]
2005-06-07
463 reads
By Steve Jones
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Comments posted to this topic are about the item Server-Level Table sizes
Comments posted to this topic are about the item Optional Parameter Plan Optimization in...
There is a table tmp_tab:
CREATE TABLE tmp_tab ( id int, val int );
INSERT INTO tmp_tab VALUES (1, 1), (2, NULL), (3, 3), (4, 4), (5, 5);You want to order the rows ids by the following expression:
ISNULL(val, id) + 1Which of the following queries produces the expected ordering and why? (Select all correct) See possible answers