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Lookup table - Wikipedia
https://en.wikipedia.org/wiki/Lookup_table
WebIn computer science, a lookup table (LUT) is an array that replaces runtime computation with a simpler array indexing operation, in a process termed as direct addressing. The savings in processing time can be significant, because retrieving a value from memory is often faster than carrying out an "expensive" computation or input/output ...
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database - What is a lookup table? - Stack Overflow
https://stackoverflow.com/questions/3419847/what-is-a-lookup-table
WebA 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.
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How to Create a Lookup Table in Excel (5 Easy Ways)
https://www.exceldemy.com/how-to-create-a-lookup-table-in-excel/
WebDec 20, 2023 · Using the XLOOKUP Function to Create a Lookup Table. The XLOOKUP Function is an excellent choice to create a lookup table in Excel. Follow the given steps for creating a lookup table with the XLOOKUP function. First, write the Product ID in Cell F5 whose Price we want to find.
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Lookup Table in Databases | Baeldung on Computer Science
https://www.baeldung.com/cs/lookup-table-in-databases
WebMar 18, 2024 · 1. Introduction. In this tutorial, we’ll study the lookup tables in databases. Lookup tables are frequently used in computer vision and graphic programming where they save a lot of heavy computations. 2. Lookup Table. A lookup table or LUT maps keys to values. Keys are unique and no value appears more than once.
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LOOKUP Table in Excel - What Is It? Create, Examples & Template
https://www.wallstreetmojo.com/lookup-table-in-excel/
WebDec 28, 2023 · The LOOKUP Table in Excel helps users find the lookup_value using the LOOKUP function. In Excel, VLOOKUP is the most commonly used LOOKUP function. Another important lookup function is HLOOKUP. Therefore, V stands for vertical lookup in VLOOKUP, and H stands for horizontal lookup in HLOOKUP.
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Look-up Tables in SQL - Simple Talk - Redgate Software
https://www.red-gate.com/simple-talk/databases/sql-server/t-sql-programming-sql-server/look-up-tables-in-sql/
WebFeb 1, 2011 · Look-up Tables in SQL - Simple Talk. Lookup tables can be a force for good in a relational database. Whereas the 'One True Lookup Table' remains a classic of bad database design, an auxiliary table that holds static data, and is used to lookup values, still has powerful magic. Joe Celko explains.... History.
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How to Create a Lookup Table in Excel & Google Sheets
https://www.automateexcel.com/how-to/lookup-table/
WebSep 17, 2023 · A lookup table enables you to fetch data from your existing table or range of data using the VLOOKUP Function. In cell G3, type in the name of the Product to look up the Qty in Stock and Price for. In cell H3, type in a VLOOKUP formula to get the Qty in Stock for that Product. Type the formula : =VLOOKUP(G3,$B$3:$D$9,2,FALSE)
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How exactly do lookup tables work and how to implement them?
https://stackoverflow.com/questions/51624933/how-exactly-do-lookup-tables-work-and-how-to-implement-them
WebAug 1, 2018 · A "lookup table" is simply a container (any kind of container) that contains values you look up, and usually map to some other value. In its simplest form, consider the following: struct MapIntToString { int value; char* string; }; MapIntToString my_map[] = { { 1, "one" }, { 2, "two" }, { 3, "three" }, // ...
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How To Create A SQL Lookup Table | Learning SQL - Medium
https://medium.com/learning-sql/sql-users-reduce-your-case-statements-with-a-lookup-table-d09da47bf65
WebMar 13, 2023 · Lookup Table: A Stupid Simple Way To Map Your SQL Fields. Instead of manually searching a column for a given value, a SQL lookup table contains your 1:1 mapping relationship and a primary key...
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Lookup Tables Best Practices: DB Tables... or Enumerations
https://stackoverflow.com/questions/433490/lookup-tables-best-practices-db-tables-or-enumerations
Web9 Answers. Sorted by: 50. Generally you should only use enumeration where there is a clear set of items that will not change, e.g. primary colours, or continent names. Otherwise lookup tables with appropriately implemented foreign keys are pretty much always the best option.
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