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  2. Hierarchical and recursive queries in SQL - Wikipedia

    en.wikipedia.org/wiki/Hierarchical_and_recursive...

    A common table expression, or CTE, (in SQL) is a temporary named result set, derived from a simple query and defined within the execution scope of a SELECT, INSERT, UPDATE, or DELETE statement. CTEs can be thought of as alternatives to derived tables ( subquery ), views , and inline user-defined functions.

  3. Comparison of relational database management systems - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_relational...

    Note (4): Used for InMemory ColumnStore index, temporary hash index for hash join, Non/Cluster & fill factor. Note (5): InnoDB automatically generates adaptive hash index [125] entries as needed. Note (6): Can be implemented using Function-based Indexes in Oracle 8i and higher, but the function needs to be used in the sql for the index to be used.

  4. Maximum time interval error - Wikipedia

    en.wikipedia.org/wiki/Maximum_time_interval_error

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  5. Q10 (temperature coefficient) - Wikipedia

    en.wikipedia.org/wiki/Q10_(temperature_coefficient)

    With continued increase in temperature, performance decreases rapidly (Q 10 of 0.2-0.8) up to a maximum temperature at which all biological function again ceases. [5] Within vertebrates, different skeletal muscle activity has correspondingly different thermal dependencies.

  6. Tail value at risk - Wikipedia

    en.wikipedia.org/wiki/Tail_value_at_risk

    The former definition may not be a coherent risk measure in general, however it is coherent if the underlying distribution is continuous. [4] The latter definition is a coherent risk measure. [3] TVaR accounts for the severity of the failure, not only the chance of failure. The TVaR is a measure of the expectation only in the tail of the ...

  7. High-temperature operating life - Wikipedia

    en.wikipedia.org/wiki/High-temperature_operating...

    The tables below provide reference to various commonly used products and the conditions under which they are used. Reliability engineers are tasked with verifying the adequate stress duration. For example, for an activation energy of 0.7 eV, a stress temperature of 125 °C and a use temperature of 55 °C, an expected operational life of five ...

  8. Test and evaluation master plan - Wikipedia

    en.wikipedia.org/wiki/Test_and_evaluation_master...

    Measures of performance are specific metrics that have a pass or fail limit that must be satisfied. These are generally identified with the words shall or must in the specification. One type of MOP is the distance that a vehicle with a specific load must travel at a specific speed before running out of fuel.

  9. Apdex - Wikipedia

    en.wikipedia.org/wiki/Apdex

    Apdex (Application Performance Index) is an open standard developed by an alliance of companies for measuring performance of software applications in computing.Its purpose is to convert measurements into insights about user satisfaction, by specifying a uniform way to analyze and report on the degree to which measured performance meets user expectations.