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128 lines
2.1 KiB
Plaintext
128 lines
2.1 KiB
Plaintext
DROP DATABASE IF EXISTS mcs138_db;
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CREATE DATABASE mcs138_db;
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USE mcs138_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', 123),('a', 1),('b', 123),('c', 1861),('c', 1991),('d', 10701),('d', 1071),('a', 92);
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SELECT a, b, MAX(b) OVER(ORDER BY a) max FROM t1;
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a b max
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NULL NULL NULL
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a 92 123
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a 1 123
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a 123 123
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b 123 123
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c 1991 1991
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c 1861 1991
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d 1071 10701
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d 10701 10701
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SELECT a, b, MAX(b) OVER(ORDER BY b DESC) max FROM t1;
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a b max
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d 10701 10701
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c 1991 10701
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c 1861 10701
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d 1071 10701
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a 123 10701
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b 123 10701
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a 92 10701
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a 1 10701
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NULL NULL 10701
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SELECT a, b, MAX(b) OVER w max FROM t1 WINDOW w AS (ORDER BY a DESC);
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a b max
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d 10701 10701
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d 1071 10701
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c 1861 10701
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c 1991 10701
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b 123 10701
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a 92 10701
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a 123 10701
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a 1 10701
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NULL NULL 10701
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SELECT a, b, MAX(b) OVER w max FROM t1 WINDOW w AS (ORDER BY b);
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a b max
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NULL NULL NULL
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a 1 1
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a 92 92
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b 123 123
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a 123 123
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d 1071 1071
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c 1861 1861
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c 1991 1991
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d 10701 10701
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SELECT a, b, MAX(b) OVER(PARTITION BY a) max FROM t1;
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a b max
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NULL NULL NULL
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a 92 123
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a 1 123
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a 123 123
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b 123 123
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c 1991 1991
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c 1861 1991
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d 1071 10701
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d 10701 10701
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SELECT a, b, MAX(b) OVER(PARTITION BY b) max FROM t1;
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a b max
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NULL NULL NULL
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a 1 1
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a 92 92
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b 123 123
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a 123 123
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d 1071 1071
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c 1861 1861
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c 1991 1991
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d 10701 10701
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SELECT a, b, MAX(b) OVER(PARTITION BY a ORDER BY a DESC) max FROM t1;
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a b max
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NULL NULL NULL
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a 92 123
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a 1 123
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a 123 123
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b 123 123
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c 1991 1991
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c 1861 1991
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d 1071 10701
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d 10701 10701
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SELECT a, b, MAX(b) OVER(PARTITION BY a ORDER BY b DESC) max FROM t1;
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a b max
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NULL NULL NULL
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a 123 123
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a 92 123
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a 1 123
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b 123 123
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c 1991 1991
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c 1861 1991
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d 10701 10701
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d 1071 10701
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SELECT a, b, MAX(b) OVER(PARTITION BY a ORDER BY b ASC) max FROM t1;
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a b max
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NULL NULL NULL
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a 1 1
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a 92 92
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a 123 123
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b 123 123
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c 1861 1861
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c 1991 1991
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d 1071 1071
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d 10701 10701
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SELECT a, b, MAX(b) OVER(PARTITION BY b ORDER BY a DESC) max FROM t1;
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a b max
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NULL NULL NULL
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a 1 1
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a 92 92
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b 123 123
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a 123 123
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d 1071 1071
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c 1861 1861
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c 1991 1991
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d 10701 10701
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SELECT a, b, MAX(b) OVER(PARTITION BY b ORDER BY b DESC) max FROM t1;
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a b max
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NULL NULL NULL
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a 1 1
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a 92 92
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b 123 123
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a 123 123
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d 1071 1071
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c 1861 1861
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c 1991 1991
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d 10701 10701
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DROP DATABASE mcs138_db;
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