执行了这个存储过程之后出现了一堆错误,表创建成功了,但是索引什么的都没加上,这是怎么回事?? USE [ YXComments ] GO DECLARE @return_value int EXEC @return_value = [ dbo ] . [ procAddComment ] @ParentID = 0 , @SourceID = 1 , @NickName = N '
执行了这个存储过程之后出现了一堆错误,表创建成功了,但是索引什么的都没加上,这是怎么回事??
<span>USE</span> <span>[</span><span>YXComments</span><span>]</span> <span>GO</span> <span>DECLARE</span> <span>@return_value</span> <span>int</span> <span>EXEC</span> <span>@return_value</span> <span>=</span> <span>[</span><span>dbo</span><span>]</span>.<span>[</span><span>procAddComment</span><span>]</span> <span>@ParentID</span> <span>=</span> <span>0</span><span>, </span><span>@SourceID</span> <span>=</span> <span>1</span><span>, </span><span>@NickName</span> <span>=</span> N<span>'</span><span>afasf</span><span>'</span><span>, </span><span>@Content</span> <span>=</span> N<span>'</span><span>sdfasdfsdf</span><span>'</span><span>, </span><span>@IP</span> <span>=</span> N<span>'</span><span>127.0.0.1</span><span>'</span><span>, </span><span>@City</span> <span>=</span> N<span>'</span><span>南阳</span><span>'</span><span>, </span><span>@BeFiltered</span> <span>=</span> <span>0</span><span>, </span><span>@Enable</span> <span>=</span> <span>1</span><span>, </span><span>@Key</span> <span>=</span> N<span>'</span><span>soft</span><span>'</span> <span>SELECT</span> <span>'</span><span>Return Value</span><span>'</span> <span>=</span> <span>@return_value</span>
消息 102,级别 15,状态 1,第 2 行
'GO' 附近有语法错误。
消息 102,级别 15,状态 1,第 2 行
'GO' 附近有语法错误。
消息 102,级别 15,状态 1,第 2 行
'GO' 附近有语法错误。
消息 102,级别 15,状态 1,第 2 行
'GO' 附近有语法错误。
消息 102,级别 15,状态 1,第 2 行
'GO' 附近有语法错误。
消息 102,级别 15,状态 1,第 2 行
'GO' 附近有语法错误。
消息 102,级别 15,状态 1,第 2 行
'GO' 附近有语法错误。
(1 行受影响)
消息 515,级别 16,状态 2,第 1 行
不能将值 NULL 插入列 'Cai',表 'YXComments.dbo.comments_soft1';列不允许有 Null 值。INSERT 失败。
语句已终止。
(1 行受影响)
<span>/*</span><span>***** Script for SelectTopNRows command from SSMS *****</span><span>*/</span> <span>ALTER</span> <span>proc</span> <span>[</span><span>dbo</span><span>]</span>.<span>[</span><span>procAddComment</span><span>]</span><span> ( </span><span>@ParentID</span> <span>int</span><span>, </span><span>@SourceID</span> <span>int</span><span>, </span><span>@NickName</span> <span>nvarchar</span>(<span>20</span><span>), </span><span>@Content</span> <span>nvarchar</span>(<span>300</span><span>), </span><span>@IP</span> <span>nvarchar</span>(<span>30</span><span>), </span><span>@City</span> <span>nvarchar</span>(<span>30</span><span>), </span><span>@BeFiltered</span> <span>bit</span><span>, </span><span>@Enable</span> <span>bit</span><span>, </span><span>@Key</span> <span>nvarchar</span>(<span>50</span><span>) ) </span><span>as</span> <span>begin</span> <span>declare</span> <span>@tableName</span> <span>nvarchar</span>(<span>80</span><span>); </span><span>declare</span> <span>@tableArea</span> <span>int</span><span>; </span><span>declare</span> <span>@mod</span> <span>int</span><span>; </span><span>declare</span> <span>@Size</span> <span>int</span><span>; </span><span>set</span> <span>@Size</span> <span>=</span> <span>100000</span><span>; </span><span>set</span> <span>@mod</span> <span>=</span> <span>@SourceID</span> <span>%</span> <span>@Size</span><span>; </span><span>if</span> <span>@mod</span> <span>></span> <span>0</span> <span>set</span> <span>@tableArea</span> <span>=</span> <span>Cast</span>(<span>@SourceID</span> <span>/</span> <span>@Size</span> <span>as</span> <span>int</span>) <span>+</span> <span>1</span><span>; </span><span>else</span> <span>set</span> <span>@tableArea</span> <span>=</span> <span>Cast</span>(<span>@SourceID</span> <span>/</span> <span>@Size</span> <span>as</span> <span>int</span><span>); </span><span>set</span> <span>@tableName</span> <span>=</span> <span>'</span><span>comments_</span><span>'</span> <span>+</span> <span>@Key</span> <span>+</span> <span>Cast</span>(<span>@tableArea</span> <span>as</span> <span>nvarchar</span>(<span>10</span><span>)); </span><span>if</span> <span>not</span> <span>Exists</span>(<span>select</span> <span>*</span> <span>from</span> <span>[</span><span>CommentsTables</span><span>]</span> <span>where</span> <span>[</span><span>Key</span><span>]</span><span>=</span><span>@Key</span> <span>and</span> <span>[</span><span>TableName</span><span>]</span><span>=</span><span>@tableName</span><span>) </span><span>begin</span> <span>declare</span> <span>@CreateSQL</span> <span>nvarchar</span>(<span>MAX</span><span>); </span><span>set</span> <span>@CreateSQL</span> <span>=</span> <span>'</span><span>Create table [dbo].[</span><span>'</span><span>+</span><span>@tableName</span><span>+</span><span>'</span><span>]( [ID] [int] IDENTITY(1,1) NOT NULL, [ParentID] [int] NOT NULL, [SourceID] [int] NOT NULL, [NickName] [nvarchar](20) NOT NULL, [Content] [nvarchar](300) NOT NULL, [Datetime] [datetime] NOT NULL, [IP] [nvarchar](30) NOT NULL, [City] [nvarchar](30) NOT NULL, [BeFiltered] [bit] NOT NULL, [Enable] [bit] NOT NULL, [Lou] [int] NOT NULL, [Ding] [int] NOT NULL, [Cai] [int] NOT NULL, CONSTRAINT [PK_</span><span>'</span><span>+</span><span>@tableName</span><span>+</span><span>'</span><span>] PRIMARY KEY CLUSTERED ( [ID] ASC )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] ) ON [PRIMARY]</span><span>'</span> <span>EXEC</span>(<span>@CreateSQL</span><span>); </span><span>EXEC</span>(<span>'</span><span>ALTER TABLE [dbo].[</span><span>'</span><span>+</span><span>@tableName</span><span>+</span><span>'</span><span>] ADD CONSTRAINT [DF_</span><span>'</span><span>+</span><span>@tableName</span><span>+</span><span>'</span><span>_ParentID] DEFAULT ((0)) FOR [ParentID] GO </span><span>'</span><span>); </span><span>EXEC</span>(<span>'</span><span>ALTER TABLE [dbo].[</span><span>'</span><span>+</span><span>@tableName</span><span>+</span><span>'</span><span>] ADD CONSTRAINT [DF_</span><span>'</span><span>+</span><span>@tableName</span><span>+</span><span>'</span><span>_Datetime] DEFAULT (getdate()) FOR [Datetime] GO </span><span>'</span><span>); </span><span>EXEC</span>(<span>'</span><span>ALTER TABLE [dbo].[</span><span>'</span><span>+</span><span>@tableName</span><span>+</span><span>'</span><span>] ADD CONSTRAINT [DF_</span><span>'</span><span>+</span><span>@tableName</span><span>+</span><span>'</span><span>_BeFiltered] DEFAULT ((0)) FOR [BeFiltered] GO </span><span>'</span><span>); </span><span>EXEC</span>(<span>'</span><span>ALTER TABLE [dbo].[</span><span>'</span><span>+</span><span>@tableName</span><span>+</span><span>'</span><span>] ADD CONSTRAINT [DF_</span><span>'</span><span>+</span><span>@tableName</span><span>+</span><span>'</span><span>_Enable] DEFAULT ((0)) FOR [Enable] GO </span><span>'</span><span>); </span><span>EXEC</span>(<span>'</span><span>ALTER TABLE [dbo].[</span><span>'</span><span>+</span><span>@tableName</span><span>+</span><span>'</span><span>] ADD CONSTRAINT [DF_</span><span>'</span><span>+</span><span>@tableName</span><span>+</span><span>'</span><span>_Lou] DEFAULT ((1)) FOR [Lou] GO </span><span>'</span><span>); </span><span>EXEC</span>(<span>'</span><span>ALTER TABLE [dbo].[</span><span>'</span><span>+</span><span>@tableName</span><span>+</span><span>'</span><span>] ADD CONSTRAINT [DF_</span><span>'</span><span>+</span><span>@tableName</span><span>+</span><span>'</span><span>_Ding] DEFAULT ((0)) FOR [Ding] GO </span><span>'</span><span>); </span><span>EXEC</span>(<span>'</span><span>ALTER TABLE [dbo].[</span><span>'</span><span>+</span><span>@tableName</span><span>+</span><span>'</span><span>] ADD CONSTRAINT [DF_</span><span>'</span><span>+</span><span>@tableName</span><span>+</span><span>'</span><span>_Cai] DEFAULT ((0)) FOR [Cai] GO </span><span>'</span><span>); </span><span>Insert</span> <span>Into</span> <span>[</span><span>CommentsTables</span><span>]</span>(<span>[</span><span>Key</span><span>]</span>,<span>[</span><span>TableName</span><span>]</span>) <span>values</span>(<span>@Key</span>,<span>@tableName</span><span>); </span><span>end</span> <span>set</span> <span>@NickName</span> <span>=</span> <span>Replace</span>(<span>@NickName</span>,<span>''''</span>,<span>''''''</span><span>); </span><span>set</span> <span>@Content</span> <span>=</span> <span>Replace</span>(<span>@Content</span>,<span>''''</span>,<span>''''''</span><span>); </span><span>set</span> <span>@IP</span> <span>=</span> <span>Replace</span>(<span>@IP</span>,<span>''''</span>,<span>''''''</span><span>); </span><span>set</span> <span>@City</span> <span>=</span> <span>Replace</span>(<span>@City</span>,<span>''''</span>,<span>''''''</span><span>); </span><span>Exec</span>(<span>'</span><span>Insert Into dbo.[</span><span>'</span><span>+</span><span>@tableName</span><span>+</span><span>'</span><span>](ParentID,SourceID,NickName,Content,IP,City,BeFiltered,[Enable]) values (</span><span>'</span><span>+</span><span>@ParentID</span><span>+</span><span>'</span><span>,</span><span>'</span><span>+</span><span>@SourceID</span><span>+</span><span>'</span><span>,</span><span>'''</span><span>+</span><span>@NickName</span><span>+</span><span>'''</span><span>,</span><span>'''</span><span>+</span><span>@Content</span><span>+</span><span>'''</span><span>,</span><span>'''</span><span>+</span><span>@IP</span><span>+</span><span>'''</span><span>,</span><span>'''</span><span>+</span><span>@City</span><span>+</span><span>'''</span><span>,</span><span>'</span><span>+</span><span>@BeFiltered</span><span>+</span><span>'</span><span>,</span><span>'</span><span>+</span><span>@Enable</span><span>+</span><span>'</span><span>);</span><span>'</span><span>) </span><span>end</span> <span>GO</span>

InnoDBBufferPool通过缓存数据和索引页来减少磁盘I/O,提升数据库性能。其工作原理包括:1.数据读取:从BufferPool中读取数据;2.数据写入:修改数据后写入BufferPool并定期刷新到磁盘;3.缓存管理:使用LRU算法管理缓存页;4.预读机制:提前加载相邻数据页。通过调整BufferPool大小和使用多个实例,可以优化数据库性能。

MySQL与其他编程语言相比,主要用于存储和管理数据,而其他语言如Python、Java、C 则用于逻辑处理和应用开发。 MySQL以其高性能、可扩展性和跨平台支持着称,适合数据管理需求,而其他语言在各自领域如数据分析、企业应用和系统编程中各有优势。

MySQL值得学习,因为它是强大的开源数据库管理系统,适用于数据存储、管理和分析。1)MySQL是关系型数据库,使用SQL操作数据,适合结构化数据管理。2)SQL语言是与MySQL交互的关键,支持CRUD操作。3)MySQL的工作原理包括客户端/服务器架构、存储引擎和查询优化器。4)基本用法包括创建数据库和表,高级用法涉及使用JOIN连接表。5)常见错误包括语法错误和权限问题,调试技巧包括检查语法和使用EXPLAIN命令。6)性能优化涉及使用索引、优化SQL语句和定期维护数据库。

MySQL适合初学者学习数据库技能。1.安装MySQL服务器和客户端工具。2.理解基本SQL查询,如SELECT。3.掌握数据操作:创建表、插入、更新、删除数据。4.学习高级技巧:子查询和窗口函数。5.调试和优化:检查语法、使用索引、避免SELECT*,并使用LIMIT。

MySQL通过表结构和SQL查询高效管理结构化数据,并通过外键实现表间关系。1.创建表时定义数据格式和类型。2.使用外键建立表间关系。3.通过索引和查询优化提高性能。4.定期备份和监控数据库确保数据安全和性能优化。

MySQL是一个开源的关系型数据库管理系统,广泛应用于Web开发。它的关键特性包括:1.支持多种存储引擎,如InnoDB和MyISAM,适用于不同场景;2.提供主从复制功能,利于负载均衡和数据备份;3.通过查询优化和索引使用提高查询效率。

SQL用于与MySQL数据库交互,实现数据的增、删、改、查及数据库设计。1)SQL通过SELECT、INSERT、UPDATE、DELETE语句进行数据操作;2)使用CREATE、ALTER、DROP语句进行数据库设计和管理;3)复杂查询和数据分析通过SQL实现,提升业务决策效率。

MySQL的基本操作包括创建数据库、表格,及使用SQL进行数据的CRUD操作。1.创建数据库:CREATEDATABASEmy_first_db;2.创建表格:CREATETABLEbooks(idINTAUTO_INCREMENTPRIMARYKEY,titleVARCHAR(100)NOTNULL,authorVARCHAR(100)NOTNULL,published_yearINT);3.插入数据:INSERTINTObooks(title,author,published_year)VA


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