原料：數據表

create table "SysUser"(
    "UserId" serial,                  --用戶Id，自增
    "UserName" character varying(50), --用戶名
    "Pwd" character varying(50),      --密碼
        "Status" smallint,                --狀態 
    primary key("UserId")             --設置UserId主鍵
)

1.添加數據

　　語法：insert into table (column1, column2, column3,...columnN) values (value1, value2, value3,...valueN)

insert into "SysUser"("UserName","Pwd")values(‘username1‘,‘123456‘);
insert into "SysUser"("UserName","Pwd")values(‘username2‘,‘123456‘);
insert into "SysUser"("UserName","Pwd")values(‘username3‘,‘123456‘);
insert into "SysUser"("UserName","Pwd")values(‘username4‘,‘123456‘);

數據輸出

2.修改數據

　　語法：update table set column1 = value1, column2 = value2...., columnN = valueN where [condition]

update "SysUser" set "Status"=1 where "UserId"=3;

數據輸出

3.刪除數據

　　語法：delete from table where [condition];

delete from "SysUser" where "UserId"=3;

數據輸出

PostgreSQL查詢數據(基本查詢)