Data update

Task/Hash-join/00-TASK.txt

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 An [[wp:Join_(SQL)#Inner_join|inner join]] is an operation that combines two data tables into one table, based on matching column values. The simplest way of implementing this operation is the [[wp:Nested loop join|nested loop join]] algorithm, but a more scalable alternative is the [[wp:hash join|hash join]] algorithm.
 
-{{task heading}}
+;Task
 
 Implement the "hash join" algorithm, and demonstrate that it passes the test-case listed below.
 
 You should represent the tables as data structures that feel natural in your programming language.
 
-{{task heading|Guidance}}
+;Guidance
 
 The "hash join" algorithm consists of two steps:
 
@@ -33,7 +33,7 @@ In pseudo-code, the algorithm could be expressed as follows:
        '''let''' ''c'' = the concatenation of row ''a'' and row ''b''
        '''place''' row ''c'' in table ''C''
 
-{{task heading|Test-case}}
+;Test case
 
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