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join (Unix)
open-in-new
<p>join is a command in <a href="/facts/Unix/0pNL2seI">Unix</a> and <a href="/facts/Unix-like/YAKrAxzd">Unix-like</a> <a href="/facts/Operating_system/8XTuvMh2">operating systems</a> that merges the lines of two sorted <a href="/facts/Text_file/zYW4JmES">text files</a> based on the presence of a common <a href="/facts/Field_(computer_science)/jt622EDb">field</a>. It is similar to the join operator used in <a href="/facts/Relational_database/pEKGmJLy">relational databases</a> but operating on text files. </p>