The output of the EXPLAIN ANALYZE statement provides the actual execution path of an SQL statement. The output is displayed in a tree structure and contains detailed execution information of each operator at each phase. The output of the EXPLAIN ANALYZE statement contains the following parts: query...
In this case the leaves of the tree are implemented using a full table scans of the PRODUCTS and the SALES tables. The rows produced by these table scans will be consumed by the join operator. Here the join operator is a hash-join (other alternatives include nested-loop or sort-merge ...
as a result of the execution order MySQL chose. In general, MySQL can use indexes to join tables. Said that, it won't use an index on the first table's join column, as it will go through all of its rows anyway
True or false: A nested decision structure can achieve the same logic as a case structure. True or false? The supply chain strategy of a company should be aligned with its business strategy. There is no one ideal strategy-evaluation system for all organizations. Indicate whether...
Taking JS as an example, there are three main parts in this process: analyzing function parameters, analyzing variable declarations, and analyzing function declarations. The purpose of the grammatical analysis stage is to identify whether the grammatical structure (ie, sentence or sentence) of the so...
More than one dichotomous key can be developed to identify the same group of organisms, as there are many different criteria that can be used. For...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our ...
Describe how to use nested loops to find the sum of the components in each row of a two-dimensional array. 1) Give an example of the use of sets. Illustrate the operations of union and intersection by using these sets. 2) What are subsets? Demonstrate the concept with ...
Thus, our study aims to determine the drivers of alien species colonisation on post-coal mine heaps, therefore, providing a theoretical understanding of the structure and function of plant communities in these novel ecosystems. Specifically, we addressed the following questions: (1) Which alien ...
In order to check, whether performance in the first four conditions was further influenced by other variables, we fitted generalized linear mixed models (GLMM) with a binomial error structure using the package lme440. The dependent variable was congruency, that is, whether the selected shape match...
A central proposition in this theory is that people make choices and act in their social contacts as responses to emotional, cognitive, and behavioural elements of such interactions, and that these processes interact between settings on different ecological levels, conceived as a set of nested ...