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Overview
| Comment: | Pre-expand key railroad diagrams in the windowfunctions.html page. |
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| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA3-256: |
61483bc834c9ca72dd857fc0334f7565 |
| User & Date: | drh 2018-08-15 13:21:40 |
Context
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2018-08-25
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| 14:56 | Fix a duplicate fragment name in lang_expr.html check-in: 8ffd68dac7 user: drh tags: trunk | |
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2018-08-15
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| 13:21 | Pre-expand key railroad diagrams in the windowfunctions.html page. check-in: 61483bc834 user: drh tags: trunk | |
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2018-08-08
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| 17:36 | Fixes to the CGI handling in althttpd.c. check-in: 6faf1e47b9 user: drh tags: trunk | |
Changes
Changes to pages/windowfunctions.in.
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<p>A window function is a special SQL function where the input values are taken from a "window" of one or more rows in the results set of a SELECT statement. <tcl> RecursiveBubbleDiagram window-function-invocation </tcl> <p>Window functions are distinguished from ordinary SQL functions by the presence of an OVER clause. If a function invocation has an OVER clause then it is a window function, and if lacks a OVER clause it is an ordinary function. Window functions might also have a FILTER clause in between the function and the OVER clause. |
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<p>A window function is a special SQL function where the input
values are taken from
a "window" of one or more rows in the results set of a SELECT statement.
<tcl>
RecursiveBubbleDiagram window-function-invocation window-defn frame-spec filter
</tcl>
<p>Window functions are distinguished from ordinary SQL functions by the
presence of an OVER clause. If a function invocation has an OVER clause
then it is a window function, and if lacks a OVER clause it is an ordinary
function. Window functions might also have a FILTER
clause in between the function and the OVER clause.
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