You've already forked mariadb-columnstore-engine
mirror of
https://github.com/mariadb-corporation/mariadb-columnstore-engine.git
synced 2025-11-27 08:21:15 +03:00
139 lines
2.5 KiB
Plaintext
139 lines
2.5 KiB
Plaintext
DROP DATABASE IF EXISTS mcs145_db;
|
|
CREATE DATABASE mcs145_db;
|
|
USE mcs145_db;
|
|
CREATE TABLE t1 (a CHAR(1), b INT)ENGINE=Columnstore;
|
|
INSERT INTO t1 VALUES ('', NULL),('a', 12),('a', 13),('b', 14),('b', 15),('b', 16),('b', 17),('b', 18),('a', 19);
|
|
SELECT a, b, VARIANCE(b) OVER(PARTITION BY a) variance FROM t1;
|
|
a b variance
|
|
NULL NULL NULL
|
|
a 19 9.5556
|
|
a 13 9.5556
|
|
a 12 9.5556
|
|
b 17 2.0000
|
|
b 18 2.0000
|
|
b 14 2.0000
|
|
b 15 2.0000
|
|
b 16 2.0000
|
|
SELECT a, b, VARIANCE(b) OVER(PARTITION BY a DESC) variance FROM t1;
|
|
a b variance
|
|
NULL NULL NULL
|
|
a 19 9.5556
|
|
a 13 9.5556
|
|
a 12 9.5556
|
|
b 17 2.0000
|
|
b 18 2.0000
|
|
b 14 2.0000
|
|
b 15 2.0000
|
|
b 16 2.0000
|
|
SELECT a, b, VARIANCE(b) OVER(PARTITION BY b DESC) variance FROM t1;
|
|
a b variance
|
|
NULL NULL NULL
|
|
a 12 0.0000
|
|
a 13 0.0000
|
|
b 14 0.0000
|
|
b 15 0.0000
|
|
b 16 0.0000
|
|
b 17 0.0000
|
|
b 18 0.0000
|
|
a 19 0.0000
|
|
SELECT a, b, VARIANCE(b) OVER(PARTITION BY b) variance FROM t1;
|
|
a b variance
|
|
NULL NULL NULL
|
|
a 12 0.0000
|
|
a 13 0.0000
|
|
b 14 0.0000
|
|
b 15 0.0000
|
|
b 16 0.0000
|
|
b 17 0.0000
|
|
b 18 0.0000
|
|
a 19 0.0000
|
|
SELECT a, b, VARIANCE(b) OVER(ORDER BY a) variance FROM t1;
|
|
a b variance
|
|
NULL NULL NULL
|
|
a 19 9.5556
|
|
a 13 9.5556
|
|
a 12 9.5556
|
|
b 17 5.2500
|
|
b 18 5.2500
|
|
b 14 5.2500
|
|
b 15 5.2500
|
|
b 16 5.2500
|
|
SELECT a, b, VARIANCE(b) OVER(ORDER BY b) variance FROM t1;
|
|
a b variance
|
|
NULL NULL NULL
|
|
a 12 0.0000
|
|
a 13 0.2500
|
|
b 14 0.6667
|
|
b 15 1.2500
|
|
b 16 2.0000
|
|
b 17 2.9167
|
|
b 18 4.0000
|
|
a 19 5.2500
|
|
SELECT a, b, VARIANCE(b) OVER(ORDER BY a DESC) variance FROM t1;
|
|
a b variance
|
|
b 16 2.0000
|
|
b 15 2.0000
|
|
b 18 2.0000
|
|
b 17 2.0000
|
|
b 14 2.0000
|
|
a 19 5.2500
|
|
a 12 5.2500
|
|
a 13 5.2500
|
|
NULL NULL 5.2500
|
|
SELECT a, b, VARIANCE(b) OVER(ORDER BY b DESC) variance FROM t1;
|
|
a b variance
|
|
a 19 0.0000
|
|
b 18 0.2500
|
|
b 17 0.6667
|
|
b 16 1.2500
|
|
b 15 2.0000
|
|
b 14 2.9167
|
|
a 13 4.0000
|
|
a 12 5.2500
|
|
NULL NULL 5.2500
|
|
SELECT a, b, VARIANCE(b) OVER(PARTITION BY a ORDER BY b) variance FROM t1;
|
|
a b variance
|
|
NULL NULL NULL
|
|
a 12 0.0000
|
|
a 13 0.2500
|
|
a 19 9.5556
|
|
b 14 0.0000
|
|
b 15 0.2500
|
|
b 16 0.6667
|
|
b 17 1.2500
|
|
b 18 2.0000
|
|
SELECT a, b, VARIANCE(b) OVER(PARTITION BY b ORDER BY a) variance FROM t1;
|
|
a b variance
|
|
NULL NULL NULL
|
|
a 12 0.0000
|
|
a 13 0.0000
|
|
b 14 0.0000
|
|
b 15 0.0000
|
|
b 16 0.0000
|
|
b 17 0.0000
|
|
b 18 0.0000
|
|
a 19 0.0000
|
|
SELECT a, b, VARIANCE(b) OVER(PARTITION BY b ORDER BY b DESC) variance FROM t1;
|
|
a b variance
|
|
NULL NULL NULL
|
|
a 12 0.0000
|
|
a 13 0.0000
|
|
b 14 0.0000
|
|
b 15 0.0000
|
|
b 16 0.0000
|
|
b 17 0.0000
|
|
b 18 0.0000
|
|
a 19 0.0000
|
|
SELECT a, b, VARIANCE(b) OVER(PARTITION BY a ORDER BY a DESC) variance FROM t1;
|
|
a b variance
|
|
NULL NULL NULL
|
|
a 19 9.5556
|
|
a 13 9.5556
|
|
a 12 9.5556
|
|
b 17 2.0000
|
|
b 18 2.0000
|
|
b 14 2.0000
|
|
b 15 2.0000
|
|
b 16 2.0000
|
|
DROP DATABASE mcs145_db;
|