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38 lines
844 B
Text
38 lines
844 B
Text
show status like '%window%';
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Variable_name Value
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Feature_window_functions 0
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create table t1 (a int, b int);
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insert into t1 values (1, 10), (2, 20), (3, 30);
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select a, b, rank() over (order by a) from t1;
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a b rank() over (order by a)
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1 10 1
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2 20 2
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3 30 3
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show status like '%window%';
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Variable_name Value
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Feature_window_functions 1
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select a, b, rank() over (order by a), sum(a) over (order by a) from t1;
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a b rank() over (order by a) sum(a) over (order by a)
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1 10 1 1
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2 20 2 3
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3 30 3 6
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show status like '%window%';
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Variable_name Value
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Feature_window_functions 2
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select t_a.r1, t_b.r2
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from (select a, b, rank() over (order by a) as r1 from t1) t_a,
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(select a, b, row_number() over (order by a) as r2 from t1) t_b;
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r1 r2
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1 1
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1 2
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1 3
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2 1
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2 2
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2 3
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3 1
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3 2
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3 3
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show status like '%window%';
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Variable_name Value
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Feature_window_functions 4
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drop table t1;
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