Examlex
Complete the identity.
-
Null Values
Special markers in databases designated for fields with unknown or inapplicable information.
Is Null
A condition used in SQL to check for empty fields in a database.
Data Type
A classification identifying the type of data that can be held by a column in a database or a variable in programming, such as integer, text, or boolean.
Filter by Form
A method in database applications that allows users to specify criteria in a form-like interface to filter and display only matching records.
Q15: <span class="ql-formula" data-value="y=2 \cos (3 x-\pi)"><span class="katex"><span
Q18: The complex cube roots of
Q22: <span class="ql-formula" data-value="\mathbf { v } =
Q48: The formula <span class="ql-formula" data-value="\sin
Q49: <span class="ql-formula" data-value="\left[ 3 \left( \cos 15
Q51: <span class="ql-formula" data-value="\csc 17 ^ { \circ
Q51: <span class="ql-formula" data-value="\begin{array}{c}x+2 y \geq 2 \\x-y
Q61: <span class="ql-formula" data-value="\sin ^ { 4 }
Q182: <span class="ql-formula" data-value="y = 2 + \cos
Q207: <span class="ql-formula" data-value="\sec \theta = - \frac