PostgreSQL查询数据(基本查询)

原料：数据表

create table "SysUser"(
    "UserId" serial,                  --用户Id，自增
    "UserName" character varying(50), --用户名
    "Pwd" character varying(50),      --密码
        "Status" smallint,                --状态 
    primary key("UserId")             --设置UserId主键
)

1.添加数据

　　语法：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');

数据输出

2.修改数据

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

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

数据输出

3.删除数据

　　语法：delete from table where [condition];

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

数据输出