feat: added reset block

db_schema.sql

@@ -1,3 +1,5 @@
+-- @block
+-- Create tables
 CREATE TABLE num (
     adsh      VARCHAR(255),
     tag       VARCHAR(255),
@@ -73,3 +75,14 @@ CREATE TABLE tag (
     tlabel    VARCHAR(255),
     doc       TEXT
 );
+-- @end
+
+-- @block
+-- Reset db
+SET FOREIGN_KEY_CHECKS = 0;
+DROP TABLE IF EXISTS num;
+DROP TABLE IF EXISTS pre;
+DROP TABLE IF EXISTS sub;
+DROP TABLE IF EXISTS tag;
+SET FOREIGN_KEY_CHECKS = 1;
+-- @end