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139 lines
2.4 KiB
Plaintext
139 lines
2.4 KiB
Plaintext
DROP DATABASE IF EXISTS mcs144_db;
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CREATE DATABASE mcs144_db;
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USE mcs144_db;
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CREATE TABLE t1 (a CHAR(1), b INT)ENGINE=Columnstore;
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INSERT INTO t1 VALUES ('', NULL),('a', 12),('a', 13),('b', 14),('b', 15),('b', 16),('b', 17),('b', 18),('a', 19);
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SELECT a, b, STDDEV_SAMP(b) OVER(PARTITION BY a) pd FROM t1;
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a b pd
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NULL NULL NULL
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a 19 3.7859
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a 13 3.7859
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a 12 3.7859
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b 17 1.5811
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b 18 1.5811
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b 14 1.5811
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b 15 1.5811
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b 16 1.5811
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SELECT a, b, STDDEV_SAMP(b) OVER(PARTITION BY a DESC) pd FROM t1;
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a b pd
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NULL NULL NULL
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a 19 3.7859
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a 13 3.7859
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a 12 3.7859
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b 17 1.5811
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b 18 1.5811
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b 14 1.5811
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b 15 1.5811
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b 16 1.5811
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SELECT a, b, STDDEV_SAMP(b) OVER(PARTITION BY b DESC) pd FROM t1;
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a b pd
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NULL NULL NULL
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a 12 NULL
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a 13 NULL
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b 14 NULL
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b 15 NULL
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b 16 NULL
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b 17 NULL
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b 18 NULL
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a 19 NULL
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SELECT a, b, STDDEV_SAMP(b) OVER(PARTITION BY b) pd FROM t1;
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a b pd
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NULL NULL NULL
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a 12 NULL
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a 13 NULL
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b 14 NULL
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b 15 NULL
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b 16 NULL
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b 17 NULL
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b 18 NULL
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a 19 NULL
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SELECT a, b, STDDEV_SAMP(b) OVER(ORDER BY a) pd FROM t1;
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a b pd
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NULL NULL NULL
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a 19 3.7859
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a 13 3.7859
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a 12 3.7859
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b 17 2.4495
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b 18 2.4495
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b 14 2.4495
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b 15 2.4495
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b 16 2.4495
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SELECT a, b, STDDEV_SAMP(b) OVER(ORDER BY b) pd FROM t1;
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a b pd
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NULL NULL NULL
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a 12 NULL
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a 13 0.7071
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b 14 1.0000
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b 15 1.2910
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b 16 1.5811
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b 17 1.8708
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b 18 2.1602
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a 19 2.4495
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SELECT a, b, STDDEV_SAMP(b) OVER(ORDER BY a DESC) pd FROM t1;
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a b pd
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b 16 1.5811
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b 15 1.5811
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b 18 1.5811
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b 17 1.5811
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b 14 1.5811
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a 19 2.4495
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a 12 2.4495
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a 13 2.4495
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NULL NULL 2.4495
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SELECT a, b, STDDEV_SAMP(b) OVER(ORDER BY b DESC) pd FROM t1;
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a b pd
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a 19 NULL
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b 18 0.7071
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b 17 1.0000
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b 16 1.2910
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b 15 1.5811
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b 14 1.8708
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a 13 2.1602
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a 12 2.4495
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NULL NULL 2.4495
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SELECT a, b, STDDEV_SAMP(b) OVER(PARTITION BY a ORDER BY b) pd FROM t1;
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a b pd
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NULL NULL NULL
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a 12 NULL
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a 13 0.7071
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a 19 3.7859
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b 14 NULL
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b 15 0.7071
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b 16 1.0000
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b 17 1.2910
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b 18 1.5811
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SELECT a, b, STDDEV_SAMP(b) OVER(PARTITION BY b ORDER BY a) pd FROM t1;
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a b pd
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NULL NULL NULL
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a 12 NULL
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a 13 NULL
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b 14 NULL
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b 15 NULL
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b 16 NULL
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b 17 NULL
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b 18 NULL
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a 19 NULL
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SELECT a, b, STDDEV_SAMP(b) OVER(PARTITION BY b ORDER BY b DESC) pd FROM t1;
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a b pd
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NULL NULL NULL
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a 12 NULL
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a 13 NULL
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b 14 NULL
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b 15 NULL
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b 16 NULL
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b 17 NULL
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b 18 NULL
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a 19 NULL
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SELECT a, b, STDDEV_SAMP(b) OVER(PARTITION BY a ORDER BY a DESC) pd FROM t1;
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a b pd
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NULL NULL NULL
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a 19 3.7859
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a 13 3.7859
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a 12 3.7859
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b 17 1.5811
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b 18 1.5811
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b 14 1.5811
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b 15 1.5811
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b 16 1.5811
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DROP DATABASE mcs144_db;
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