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  • 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
    )
    View Code

    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

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  • 原文地址:https://www.cnblogs.com/yuyuefly/p/9674227.html
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