博海软件

一、hive0-10 版本使用cp hive-default.xml.properties hive-site.xml后，生成新的配置文件hive-site.xml后，运行hive 命令后报下面的错误：hive-site.xml:180:3: The element type "description" must be terminated by the matching end-tag "...

SELECT * FROM CATEGORY c CONNECT BY PRIOR c.id = c.category_parent_id START WITH c.id = 123 上面的sql查询 category_parent_id 是 123 的结果集。SELECT * FROM CATEGORY c CONNECT BY PRIOR c.category_paren...

SELECT * FROM tip t1 , (SELECT tipidFROM tipORDER BY RAND()LIMIT 0,2) t2 WHERE t1.tipid = t2.tipid 

Start with...Connect By子句递归查询一般用于一个表维护树形结构的应用。创建示例表：CREATE TABLE TBL_TEST(  ID    NUMBER,  NAME  VARCHAR2(100 BYTE),  PID   NUMBER                                  DEFAU...

create user '<user_name>' identified by '<password>'grant on *.* to '<user_name>' with grant option  

使用以下命令看MySQL中当前的字条集：show variables like 'character_%'; 在使用MySQL前，最好修改MySQL的字符集为:utf8。注意是utf8,不是utf-8。

一、PLSQL8.0 的注册码如下： password: xs374ca Product Code: kh46jvlftbndfplf34qvjv4wzjypt8ugf93rvk7zfv Serial Number: 863883278 

SQLyog Enterprise - MySQL GUI v8.1 注册码如下： 用户名：yunjian注册码：81f43d3dd20872b6