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Selecting only certain columns to load: (or selecting null columns not to load). For example, if the source data has three columns (aka "attributes"), roll_no, age, and salary, then the selection may take only roll_no and salary. Or, the selection mechanism may ignore all those records where salary is not present (salary = null).
In programming languages (especially functional programming languages) and type theory, an option type or maybe type is a polymorphic type that represents encapsulation of an optional value; e.g., it is used as the return type of functions which may or may not return a meaningful value when they are applied.
PowerBuilder has a native data-handling object called a DataWindow, which can be used to create, edit, and display data from a database.This object gives the programmer a number of tools for specifying and controlling user interface appearance and behavior, and also provides simplified access to database content and JSON or XML from Web services.
Technically, Perl does not have a convention for including block comments in source code, but POD is routinely used as a workaround. PHP. PHP supports standard C/C++ style comments, but supports Perl style as well. Python. The use of the triple-quotes to comment-out lines of source, does not actually form a comment. [19]
Alleged car thief busted with help of dimwitted diary entry: ‘Totally stole a car today!’
Chiefs increase lead for No. 1 seed. The Chiefs create a lot of their own luck, but they have caught breaks this season. They've been living right in close games, winning each game they've been in ...
The Minnesota Vikings have agreed to a trade to acquire left tackle Cam Robinson from the Jacksonville Jaguars, NFL Network reports. The deal provides protection for Sam Darnold's blind slide ...
This can be used to extract any bitfield of the input, and even do a lot of bit-level shuffling that previously would have been expensive. While what these instructions do is similar to bit level gather-scatter SIMD instructions, PDEP and PEXT instructions (like the rest of the BMI instruction sets) operate on general-purpose registers.