Optimization and performance tuning
What do you mean by optimization and performance tuning and explain how does it actually work in the practical projects?
Expert
Performance tuning and optimization of a query includes collecting the statistics on join columns, ignoring cross product join, selection of suitable primary index (to avoid skewness in storage) and utilizing the secondary index and avoiding the NUSI is advisable.
Another company used statistic in reports is the total number of orders placed by a shopper. Complete the following steps to create a function named NUM_PURCH_SF that accepts a shopper id and returns the total number of orders the shopper has placed. Use the function in a SELECT statement to display
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