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  • postgresql学习

     1 创建数据库:
     2 create database xt with owner = xt encoding = "utf-8";
     3 修改数据库:
     4 alter database xt rename to gxt;
     5 --连接数
     6 alert database gxt connection limit 20; 
     7 --删除
     8 drop database gxt;
     9 
    10 ---------------------------------------------------------------------------
    11 创建表: 类似mysql
    12 alter table stu rename to tab_student;
    13 alter table tab_student rename id to bh;
    14 alter table tab_student alter column bh type varchar(20);
    15 alter table tab_student drop column bh ;
    16 alter table tab_student add column bh varchar(20);
    17 drop table  if exists tab_student;
    18 ----------------------------------------------------------------------------
    19 数据类型
    20 日期与时间类型 
    21 time                           10:05:05
    22 date                           2019-05-13
    23 timestamp                  2019-05-13 10:05:05
    24 
    25 text                           无长度限制(长文本)

    其他参考博客: https://www.cnblogs.com/mchina/archive/2012/08/11/2535005.html

    https://www.cnblogs.com/mchina/archive/2012/05/17/2507102.html lnmp

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  • 原文地址:https://www.cnblogs.com/But-you/p/10856479.html
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