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vendor/scrivo/highlight.php/test/markup/pgsql/window-functions.txt

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+-- window functions
+
+-- frame clause:
+
+RANGE UNBOUNDED PRECEDING EXCLUDE CURRENT ROW,
+RANGE 10 PRECEDING EXCLUDE GROUP,
+RANGE CURRENT ROW EXCLUDE TIES,
+RANGE 10 FOLLOWING EXCLUDE NO OTHERS,
+RANGE UNBOUNDED FOLLOWING,
+RANGE BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW;
+
+ROWS UNBOUNDED PRECEDING EXCLUDE CURRENT ROW,
+ROWS 10 PRECEDING EXCLUDE GROUP,
+ROWS CURRENT ROW EXCLUDE TIES,
+ROWS 10 FOLLOWING EXCLUDE NO OTHERS,
+ROWS UNBOUNDED FOLLOWING,
+ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW;
+
+GROUPS UNBOUNDED PRECEDING EXCLUDE CURRENT ROW,
+GROUPS 10 PRECEDING EXCLUDE GROUP,
+GROUPS CURRENT ROW EXCLUDE TIES,
+GROUPS 10 FOLLOWING EXCLUDE NO OTHERS,
+GROUPS UNBOUNDED FOLLOWING,
+GROUPS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW;
+
+-- examples
+
+SELECT string_agg(empno, ',' ORDER BY a) FROM empsalary;
+SELECT percentile_cont(0.5) WITHIN GROUP (ORDER BY income) FROM households;
+SELECT count(*) FILTER (WHERE i < 5) FROM generate_series(1,10) AS s(i);
+SELECT depname, empno, salary, avg(salary) OVER (PARTITION BY depname) FROM empsalary;
+SELECT salary, sum(salary) OVER (ORDER BY salary) FROM empsalary;
+SELECT sum(salary) OVER w, avg(salary) OVER w
+  FROM empsalary
+  WINDOW w AS (PARTITION BY depname ORDER BY salary DESC);