Examlex
For testing a research hypothesis, the burden of proof that a new product is no better than the original is placed on the new product, and the research hypothesis is formulated as the null hypothesis.
Number Field
An input field in software or a database designed to only contain numerical values.
Self Join
A join in SQL where a table is joined to itself to compare rows within the same table.
Parent Table
A table in a database that has one or more related child tables through a foreign key relationship, establishing a hierarchy.
Child Table
A table in a database that has a foreign key linking to the primary key of another table, known as the parent table.
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