DataGrip: write multi sql

we can use DataGrip to write Sqls in a window. Thats wonderful.

for example:

-- desc tbl_unit;
-- select * from tbl_unit;

# 每个区(高桥区)下面的所有街道信息：
/*
select
  id,
  name,
  manager_user,
  address,
  gds1
from tbl_unit
where fatherid in (select id
                   from tbl_unit
                   where del = 0 and fatherid = 2)
      and state = '正常营业'
      and area_id = 1;
      */

When we use it ,we can write everything. When we don't use it ,we can make an annotation by -- # or /**/

注：代码上面的"正常营业"并不是笔者设计的，笔者后来看到这汉字，实在无法接受。