tests for BulkFilter

Useful queries.md

@@ -1,3 +1,16 @@
+# filter.surql examples
+## Delete entity and related claims, if entity doesn't have the claim, number of episodes property (P1113)
+```
+let $del = select claims, id from Entity
+where claims.claims[where id = Property:1113].value.Thing == [];
+
+let $entity = return (select id from $del).id;
+let $claims = return (select claims from $del).claims;
+
+delete $claims;
+delete $entity;
+```
+
 # Get number of episodes
 ```
 let $number_of_episodes = (select claims.claims[where id = Property:1113][0].value.ClaimValueData.Quantity.amount as number_of_episodes from Entity where label = "Black Clover, season 1")[0].number_of_episodes;