diff --git a/pkg/sortby/random.go b/pkg/sortby/random.go
index 0adbfa844..3a79a7b98 100644
--- a/pkg/sortby/random.go
+++ b/pkg/sortby/random.go
@@ -15,8 +15,12 @@ const (
 func RandomExpr(dialect gorm.Dialect) *gorm.SqlExpr {
 	switch dialect.GetName() {
 	case MySQL:
+		// A seed integer can be passed as an argument, e.g. "RAND(2342)", to generate
+		// reproducible pseudo-random values, see https://mariadb.com/kb/en/rand/.
 		return gorm.Expr("RAND()")
 	case SQLite3:
+		// SQLite does not support specifying a seed to generate a deterministic sequence
+		// of pseudo-random values, see https://www.sqlite.org/lang_corefunc.html#random.
 		return gorm.Expr("RANDOM()")
 	default:
 		return gorm.Expr("RAND()")