You've already forked mariadb-columnstore-engine
mirror of
https://github.com/mariadb-corporation/mariadb-columnstore-engine.git
synced 2025-11-28 20:23:58 +03:00
17 lines
636 B
Plaintext
17 lines
636 B
Plaintext
DROP DATABASE IF EXISTS mcs200_db;
|
|
CREATE DATABASE mcs200_db;
|
|
USE mcs200_db;
|
|
CREATE TABLE t1 (x INT, y MEDIUMINT, z CHAR(5))ENGINE=Columnstore;
|
|
INSERT INTO t1 VALUES (NULL, NULL, ''),(20, 1, 'aaa'),(39, 2, 'aaa'),(48, 3, 'bbb'),(57, 4, 'bbb'),(66, 5, 'aaa'),(75, 6, 'aaa'),(84, 7, 'bbb');
|
|
SELECT REGR_SLOPE(y, x) FROM t1;
|
|
REGR_SLOPE(y, x)
|
|
0.09745260663507109
|
|
SELECT z, REGR_SLOPE(y, x) FROM t1 GROUP BY z ORDER BY z;
|
|
z REGR_SLOPE(y, x)
|
|
NULL NULL
|
|
aaa 0.0935856992639327
|
|
bbb 0.1111111111111111
|
|
SELECT REGR_SLOPE(y) FROM t1;
|
|
ERROR HY000: Can't initialize function 'regr_slope'; regr_slope() requires two arguments
|
|
DROP DATABASE mcs200_db;
|