A lookup table is normally a table that acts as a "master list" for something and you use it to look up a business key value (like "Make") in exachange for it's identifier (like the id column) for use in some other table's foreign key column.

Jul 2, 2016 · Lookup tables (or code tables, as some people call them) are usually a collection of the possible values that can be given for a certain column. For example, suppose we have a lookup table called p...

May 24, 2018 · I would like to know some things about using lookup tables in python. For my task, I want to pick a random pulse length from 15 to 70, and associate this value with a particular range of voltages from the database (for example: for a value 17, I would like the program to access the lookup table and return a range of voltages 35-50).

Jan 12, 2012 · Table B is a Link Table or Junction Table. Reference and Lookup tables can mean different things for different sources, and I am not aware of a strict definition to differentiate the two. For me personally I normally use a reference to mean an long value stored out of the main table (like a StoreID), and lookup to mean a list of allowable values (enforced by a FK …

Aug 1, 2018 · I made a program recently that dealt with a lot of if/else statements to return particular values. Someone recommended using lookup tables instead. My question is, How do they work and how do you implement them? What is the difference between a map, hash table, and lookup table.

Dec 6, 2009 · What is the most efficient way to do look-up table in C# I have a look-up table. Sort of like 0 "Thing 1" 1 "Thing 2" 2 "Reserved" 3 "Reserved" 4 "Reserved" 5 "Not a Thing" So if someone wants "Thing 1" or "Thing 2" they pass in 0 or 1. But they may pass in something else also. I have 256 of these type of things and maybe 200 of them are reserved.

Jun 16, 2009 · I have a lookup table that is something like: lookup_table key1, value1 key2, value2 key3, value3 ... keyN, valueN Then I have another table that has a random list of the keys (with repeats) in one column and I need to add the associated values in the corresponding column. For example, the second table might be: second_table key3, ? key1 ...

Sep 8, 2018 · It turns out that XOR'ing 8 data (dividend) bits at a time doesn't affect the result, since each quotient bit is based only on the most significant bit of CRC polynomial and the current most significant bit of the working dividend (data), which allows for the optimization of …

Aug 4, 2010 · I am working on an embedded C project. I have an LCD display and for each character there is a 5x7 dot matrix. To display a specific character you have to shift in 5 bytes that correlate with the d...

I'm looking for a simple way of looking up a value, using javascript, against a number of dimensions: eg. (I'm going to use products and product options to describe this, the data is coming from a