自增字段

PostgreSQL设置主键自增

CREATE TABLE student (
	id serial  NOT NULL ,	//serial序列号
	name varchar(50) COLLATE pg_catalog.default NOT NULL,
	age int4,
	information text COLLATE pg_catalog.default,
	CONSTRAINT _pkey PRIMARY KEY (id)  
);

从1开始

PostgreSQL重置主键自增从1开始

TRUNCATE student RESTART IDENTITY;

清空表数据，自增从1开始

PostgreSQL重置主键自增从1开始

//清空表数据
TRUNCATE student;
//清空表数据，自增从1开始
TRUNCATE student RESTART IDENTITY;