Revision as of 22:35, 4 March 2021 edit Fjerdingen (talk \| contribs) 150 edits →Overview: remove the "syntactic sugar" part. DISTINCT makes full sense, (As in many cases you can achieve the same result in many ways. Here using UNION, GROUP BY and others.) ← Previous edit		Revision as of 04:02, 23 March 2021 edit undo Enervation (talk \| contribs) Extended confirmed users 1,457 edits m →Limiting result rows Tag: Visual edit Next edit →
Line 249: ISO [[SQL:2008]] introduced the <code>FETCH FIRST</code> clause. According to PostgreSQL v.9 documentation, an ~~'''~~SQL ~~Window~~window function~~'''~~ ''"performs a calculation across a set of table rows that are somehow related to the current row''", in a way similar to aggregate functions.<ref>[https://www.postgresql.org/docs/9.1/static/tutorial-window.html PostgreSQL 9.1.24 Documentation - Chapter 3. Advanced Features]</ref> The name recalls signal processing [[window function \| window functions]]. A window function call always contains an '''OVER''' clause. === ROW_NUMBER() window function ===

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