云数据库RDS SQLServer版sql 的相关内容

文章 2023-04-26 来自：开发者社区

1 SQL快速入门、查询(SqlServer)[郝斌SqlServer完整版]

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文章 2023-04-19 来自：开发者社区

SqlServer 常见SQL笔试题之语句操作题详解2

做法2：涉及表：选课表，学生表，从表中查找号课程或者号课程的学生，然后分组取同一个学生，然后选择记录数大于等于选两门的同学，然后再与学生表连接SELECT SNAME FROM S1WHERESNO IN(SELECT SNO FROM SC1WHERECNO = 1 OR CNO = 2GROUPBY(SNO)HAVINGCOUNT(*)>= 2)--注意这里要是....

文章 2023-04-19 来自：开发者社区

SqlServer 常见SQL笔试题之语句操作题详解1

SqlServer常见SQL笔试题之语句操作题详解测试数据库CREATEDATABASE handWritingONPRIMARY(    name='bishi',    fileName='E:\数据库\bishi.mbf',    size= 5MB,    maxSize= 30MB,   &...

文章 2023-04-19 来自：开发者社区

SQLServer SQL连接查询深度探险(摘录）

SQL连接查询深度探险[摘录]测试环境：Windows XP ProfessionMySQL 5.0.45Oracle 9iDB2 UDB 9.1测试的SQL脚本如下：此脚本适合MySQL、DB2，如果要在Oracle上执行，需要做个替换BIGINT->INTEGER,VARCHAR、->VARCHAR2。 CREATE TABLE CUSTOMERS ( I....

文章 2023-04-19 来自：开发者社区

SQL Server SQL函数

SQL Server SQL函数字符函数日期函数数学函数系统函数

文章 2023-04-19 来自：开发者社区

SQLServer 学习笔记之超详细基础SQL语句 Part 12（The End)

Sqlserver学习笔记-----------------------接Part 11-------------------现在，我们希望从"City"列中提取前3个字符。我们使用如下SQL语句：SELECT MID(City,1,3) as SmallCity FROM Persons结果集类似这样：   16 LEN函数返回文本字段中值的长度。语法SELECT....

文章 2023-04-19 来自：开发者社区

SQLServer 学习笔记之超详细基础SQL语句 Part 11

Sqlserver学习笔记-----------------------接Part 10-------------------DECLARE@myavg float--定义平均分SELECT@myavg=avg(writtenExam)FROM studentMarsprint'本班平均分'+convert(VARCHAR(5),@myavg)IF(@myavg>70)   &am...

文章 2023-04-19 来自：开发者社区

SQLServer 学习笔记之超详细基础SQL语句 Part 10

Sqlserver学习笔记-----------------------接Part 9-------------------删除约束的语法ALTER TABLE表名 DROP CONSTRAINT约束名 6创建登陆--添加SQL登陆账户（用户账号：laiyu,密码：1234）USEstudentGOEXECSP_ADDLOGIN'laiyu','1234' &...

文章 2023-04-19 来自：开发者社区

SQLServer 学习笔记之超详细基础SQL语句 Part 9

Sqlserver学习笔记-----------------------接Part 8-------------------3范式的概念第一范式的目标是确保每列的原子性。如果每列都是不可再分的最小单元（也称为最小的原子单位。），则满足第一范式（1NF）第二范式要求每个表只描述一件事情。如果一个关系满足1NF，并且除了主键以外的其它列，都依赖该主键，则满足第二范式。（2NF） ...

文章 2023-04-19 来自：开发者社区

SQLServer 学习笔记之超详细基础SQL语句 Part 8

 Sqlserver学习笔记-----------------------接Part 7---------------------触发器str_trigger创建后往std_table中添加数据INSERTstd_TABLE(姓名,专业方向,系部代码)VALUES('浅忆','计算机',02)--出错,当IDENTITY_INSERT设置为OFF时，不能为表'std_table1'中的....

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云数据库 RDS SQL Server 版

云数据库SQL Server，具有企业许可授权，权限更为开放，引擎功能更为强大。能完美支持Windows平台的.NET架构，支持复杂SQL查询，性能优秀，并有强大的可视化管理工具，帮助您轻松管理数据。

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