-- 账户表
CREATE TABLE account (
  a_id SERIAL PRIMARY KEY, -- 账户号
  balance MONEY,		   -- 余额
  meta JSONB			   -- 元数据
);
-- {"name":"name",
--	 time:"2022-02-02",
--  “budget": [
--	{"time":"2022-02","value":20.32},
--  {"time":"2022-01","value":30.32}
--  ]
--  "discription":"something"}

-- 类别表
CREATE TABLE category (
  c_id SERIAL PRIMARY KEY, -- 类别号
  meta JSONB			-- 元数据
);
-- {"name":"name",
--	"type":"in"/"out",
--  “budget": [
--	{"time":"2022-02","value":20.32},
--  {"time":"2022-01","value":30.32}
--  ]
--	"discription":"something"}

-- 流水表
CREATE TABLE transaction (
  t_id SERIAL PRIMARY KEY,  -- 流水号
  a_id INTEGER REFERENCES account(a_id) NOT NULL,   -- 关联账户号
  c_id INTEGER REFERENCES category(c_id),			-- 关联类别号
  s_id INTEGER REFERENCES category(c_id),			-- 源账户号
  time TIMESTAMP,
  amount MONEY,
  meta JSONB -- 元数据
);
-- {"discription":"something",(可选)
--	"type":"in"/"out"/"transfer"/"init"/"modify",

--  "reimburse":{  （报销）
--  "finish": true,
--  "ref":t_id
--	}
--	"":"something"}