ClickHouse/dbms/tests/queries/0_stateless/00740_optimize_predicate_expression.sql
2018-10-17 09:02:48 +03:00

36 lines
1.1 KiB
SQL

DROP TABLE IF EXISTS test.perf;
CREATE TABLE test.perf (site String, user_id UInt64, z Float64) ENGINE = Log;
SELECT * FROM (SELECT perf_1.z AS z_1 FROM test.perf AS perf_1);
SELECT sum(mul)/sqrt(sum(sqr_dif_1) * sum(sqr_dif_2)) AS z_r
FROM(
SELECT
(SELECT avg(z_1) AS z_1_avg,
avg(z_2) AS z_2_avg
FROM (
SELECT perf_1.site, perf_1.z AS z_1
FROM test.perf AS perf_1
WHERE user_id = 000
) ALL INNER JOIN (
SELECT perf_2.site, perf_2.z AS z_2
FROM test.perf AS perf_2
WHERE user_id = 999
) USING site) as avg_values,
z_1 - avg_values.1 AS dif_1,
z_2 - avg_values.2 AS dif_2,
dif_1 * dif_2 AS mul,
dif_1*dif_1 AS sqr_dif_1,
dif_2*dif_2 AS sqr_dif_2
FROM (
SELECT perf_1.site, perf_1.z AS z_1
FROM test.perf AS perf_1
WHERE user_id = 000
) ALL INNER JOIN (
SELECT perf_2.site, perf_2.z AS z_2
FROM test.perf AS perf_2
WHERE user_id = 999
) USING site);
DROP TABLE test.perf;