text: 
  CREATE TABLE IF NOT EXISTS "azure_cost_report" (
    "id" SERIAL primary key,  -- pg的SERIAL就是自增
  
    "date_type" varchar,
    "date" timestamptz,
    "project" varchar,
    "subscription" varchar,
    "res_group_name" varchar,
    "res_type" varchar,
    "qty" int4,
    "cost" money,
  	"created_at" timestamptz,
    "updated_at" timestamptz,
    "deleted_at" timestamptz
  );
  
  
  CREATE INDEX "idx_date" ON "azure_cost_report" USING btree (  -- 加索引模板
    "date"  ASC NULLS LAST
  );
  
  
  
  
  --删
  ALTER TABLE azure_cost_report DROP COLUMN "Subscription"
  
  -- 类型 
      字符串类型三种  char varchar  text
      在pg中，这三种类型之间没有性能差别！
      在大多数情况下，应该使用text或者varchar