postgresql数据库中的建表和约束

CREATE TABLE pdw_sample_receive_item_t (
  id varchar(50),
  sample_code varchar(30) constraint pk_pdw_sample_receive_item_t
            primary key,
  id_card varchar(255),
  run_time timestamp,
  sample_num varchar(255),
  sample_type varchar(255),
  state varchar(255),
  state_name varchar(255),
  dy_nums integer,
  is_contrast char(1),
  CONSTRAINT unique_pdw_sample_receive_item_t_id UNIQUE (id)
);
comment on table pdw_sample_receive_item_t is '数据仓库层_病历基本信息';

comment on column pdw_sample_receive_item_t.id_card  is '病例卡号';

CREATE INDEX idx_pdw_sample_receive_item_t_id_card ON pdw_sample_receive_item_t USING BTREE (id_card );

以上是postgresql数据中的建表的简单示例,其中主键:

sample_code varchar(30) constraint pk_pdw_sample_receive_item_t
            primary key

唯一键:

 CONSTRAINT unique_pdw_sample_receive_item_t_id UNIQUE (id)

索引创建:

CREATE INDEX idx_pdw_sample_receive_item_t_id_card ON pdw_sample_receive_item_t USING BTREE (id_card );

表注释:

comment on table pdw_sample_receive_item_t is '数据仓库层_病历基本信息';

字段注释:

comment on column pdw_sample_receive_item_t.id_card  is '病例卡号';

另外注意postgresql数据库中大小写是敏感的;

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