fixed bugs wrt sp groupbys, insert multiple values

2022-10-26 05:37:49 +08:00
parent 6ad9ba6ea3
commit 31d823ac89
8 changed files with 150 additions and 28 deletions
@@ -0,0 +1,20 @@
+CREATE TABLE t(indiv INT, grp STRING, val INT)
+INSERT INTO t VALUES(1, 'A', 1)
+INSERT INTO t VALUES(1, 'A', 2)
+INSERT INTO t VALUES(1, 'A', 3)
+INSERT INTO t VALUES(1, 'A', 4)
+INSERT INTO t VALUES(2, 'A', 2)
+INSERT INTO t VALUES(2, 'A', 2)
+INSERT INTO t VALUES(2, 'A', 4)
+INSERT INTO t VALUES(2, 'A', 8)
+INSERT INTO t VALUES(3, 'B', 10)
+INSERT INTO t VALUES(3, 'B', 20)
+INSERT INTO t VALUES(3, 'B', 30)
+INSERT INTO t VALUES(3, 'B', 40)
+INSERT INTO t VALUES(4, 'B', 20)
+INSERT INTO t VALUES(4, 'B', 20)
+INSERT INTO t VALUES(4, 'B', 40)
+INSERT INTO t VALUES(4, 'B', 80)
+
+
+SELECT * FROM t 
@@ -0,0 +1,10 @@
+FUNCTION myCov(x, y) {
+  center_x := x - avg(x);
+  center_y := y - avg(y);
+  num := sum(center_x * center_y);
+  denom := sqrt(sum(center_x * center_x)) * sqrt(sum(center_y * center_y));
+  num / denom
+  }
+
+
+select myCov(1,2);