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问题

ubuntu 12.04 lts 安装 Mysql 报错,求助?报错

我之前应该是装过mysql,忘记为什么删掉了(或者就没装过 然后现在是需要装数据库,之前装 mariadb 不行[见http://www.oschina.net/question/86241_...
爱吃鱼的程序员 2020-06-22 18:25:31 0 浏览量 回答数 1

问题

MySQL多实例配置问题:报错

如下是MySQL-5.6.25在CentOS7下的源码编译后的多实例配置步骤,但一直报一个错误,找一天没找到原因,请求大神出现指导。具体报错:ERROR 2002 (HY000): C...
kun坤 2020-06-08 11:06:25 2 浏览量 回答数 1

回答

410 时区位置Web服务 Google Maps时区API 必应地图时区API Azure Maps时区API GeoNames时区API TimeZoneDB API AskGeo-商业(但可以说比GeoNames更准确) GeoGarage时区API-商业,主要针对航海时区。 原始时区边界数据 时区边界生成器 -从OpenStreetMaps地图数据生成时区shapefile。包括海岸线附近的领水。 以下项目以前是时区边界数据的来源,但不再得到积极维护。 tz_world-来自Eric Muller的原始shapefile数据 whereonearth-timezone-合并了WOEDB数据的GeoJSON版本 时区地理位置离线实现 使用时区边界生成器数据的实现 node-geo-tz -JavaScript库(仅Node.js) 时空-JavaScript库 tz-lookup -JavaScript库 GeoTimeZone-.NET库 地理时区 -PHP库 timezonefinder -Python库 ZoneDetect -C库 Timeshape -Java库 TimeZoneMap -Java和Android库 lutz -R库 Go-tz -Go库 时区查询 -Go库 使用较旧的tz_world数据的实现 latlong -Go库(另请阅读此帖子。) TimeZoneMapper -Java库 tzwhere -JavaScript /节点库 pytzwhere -Python库 timezone_finder -Ruby库 LatLongToTimeZone -Java和Swift库 现在几点了?-描述PHP和MongoDB的博客文章 Rundel /时区 -R库 调用其中一种Web服务的库 时区 -调用GeoNames的Ruby gem AskGeo有自己的库,可以从Java或.Net进行调用 GeoNames拥有几乎所有内容的客户端库 其他想法 使用R-Tree查找最近的城市 使用MySQL查找最近的城市 如果您知道其他任何人,请更新此列表 另外,请注意,最接近城市的方法可能不会产生“正确”的结果,只是一个近似值。 转换为Windows区域 列出的大多数方法将返回IANA时区ID。如果需要转换为Windows时区以便与TimeZoneInfo.NET中的类一起使用,请使用TimeZoneConverter库。 不要使用zone.tab 该时区信息数据库包括一个名为文件zone.tab。该文件主要用于提供时区列表供用户选择。它包括每个时区的参考点的纬度和经度坐标。这样可以创建突出显示这些点的地图。例如,请参见moment-timezone主页上显示的交互式地图。 尽管可能很想使用此数据从纬度和经度坐标解析时区,但请注意这些是点而不是边界。最好的办法是确定最接近的点,在许多情况下,这不是正确的点。
你的答案 2020-05-08 20:48:03 0 浏览量 回答数 0

回答

从数据结构角度 1、B+树索引(O(log(n))):关于B+树索引,可以参考 MySQL索引背后的数据结构及算法原理:http://blog.codinglabs.org/articles/theory-of-mysql-index.html 2、hash索引:a 仅仅能满足"=","IN"和"<=>"查询,不能使用范围查询b 其检索效率非常高,索引的检索可以一次定位,不像B-Tree 索引需要从根节点到枝节点,最后才能访问到页节点这样多次的IO访问,所以 Hash 索引的查询效率要远高于 B-Tree 索引c 只有Memory存储引擎显示支持hash索引 3、FULLTEXT索引(现在MyISAM和InnoDB引擎都支持了) 4、R-Tree索引(用于对GIS数据类型创建SPATIAL索引) 从物理存储角度 1、聚集索引(clustered index) 2、非聚集索引(non-clustered index) 从逻辑角度 1、主键索引:主键索引是一种特殊的唯一索引,不允许有空值 2、普通索引或者单列索引 3、多列索引(复合索引):复合索引指多个字段上创建的索引,只有在查询条件中使用了创建索引时的第一个字段,索引才会被使用。使用复合索引时遵循最左前缀集合 4、唯一索引或者非唯一索引 5、空间索引:空间索引是对空间数据类型的字段建立的索引,MYSQL中的空间数据类型有4种,分别是GEOMETRY、POINT、LINESTRING、POLYGON。MYSQL使用SPATIAL关键字进行扩展,使得能够用于创建正规索引类型的语法创建空间索引。创建空间索引的列,必须将其声明为NOT NULL,空间索引只能在存储引擎为MYISAM的表中创建 CREATE TABLE table_name[col_name data type]unique|fulltext|spatialindex_name[asc|desc]1、unique|fulltext|spatial为可选参数,分别表示唯一索引、全文索引和空间索引; 2、index和key为同义词,两者作用相同,用来指定创建索引 3、col_name为需要创建索引的字段列,该列必须从数据表中该定义的多个列中选择; 4、index_name指定索引的名称,为可选参数,如果不指定,MYSQL默认col_name为索引值; 5、length为可选参数,表示索引的长度,只有字符串类型的字段才能指定索引长度; 6、asc或desc指定升序或降序的索引值存储
西秦说云 2019-12-02 01:33:16 0 浏览量 回答数 0

问题

启用simulator报错

《cloudstack开发环境的搭建》 1.1 搭建虚拟机的VNC和桌面环境 1.2 搭建cloudstack开发环境 1.3 下载并编译源码 1.4 设置eclipse的cloudstack开发环境 1.5 Simulator的安装和使用...
kun坤 2020-06-10 10:11:46 15 浏览量 回答数 2

问题

LNMP整合安装Redmine2.3实录:操作报错

自上一次在LNMP环境下安装过Redmine之后发表了《LNMP下安装Redmine2.3手记》,Inhu决定再一次尝试。因为上一次Inhu是通过折中的办法,也就是利用bitnami+lnmp这种做法实现...
kun坤 2020-06-04 13:21:08 3 浏览量 回答数 1

回答

Relocalhost和127.0.0.1都无法正常访问 引用第2楼dongshan8于2016-04-19 10:05发表的  : 楼主您好, 能贴出您的 apache 配置文件内容吗? 您是如何布置的 apache + php + mysql 的呢?是手工安装,还是用自动安装脚本来安装的? ....... [url=https://bbs.aliyun.com/job.php?action=topost&tid=277757&pid=779671][/url] 版主来了, 太感动了, 多谢!!!    httpd.conf ## This is the main Apache HTTP server configuration file.  It contains the# configuration directives that give the server its instructions.# See <URL:http://httpd.apache.org/docs/2.2> for detailed information.# In particular, see # <URL:http://httpd.apache.org/docs/2.2/mod/directives.html># for a discussion of each configuration directive.## Do NOT simply read the instructions in here without understanding# what they do.  They're here only as hints or reminders.  If you are unsure# consult the online docs. You have been warned.  ## Configuration and logfile names: If the filenames you specify for many# of the server's control files begin with "/" (or "drive:/" for Win32), the# server will use that explicit path.  If the filenames do *not* begin# with "/", the value of ServerRoot is prepended -- so "logs/foo.log"# with ServerRoot set to "D:/WAMP/apache" will be interpreted by the# server as "D:/WAMP/apache/logs/foo.log".## NOTE: Where filenames are specified, you must use forward slashes# instead of backslashes (e.g., "c:/apache" instead of "c:\apache").# If a drive letter is omitted, the drive on which httpd.exe is located# will be used by default.  It is recommended that you always supply# an explicit drive letter in absolute paths to avoid confusion.## ServerRoot: The top of the directory tree under which the server's# configuration, error, and log files are kept.## Do not add a slash at the end of the directory path.  If you point# ServerRoot at a non-local disk, be sure to point the LockFile directive# at a local disk.  If you wish to share the same ServerRoot for multiple# httpd daemons, you will need to change at least LockFile and PidFile.#ServerRoot "D:/WAMP/apache"## Listen: Allows you to bind Apache to specific IP addresses and/or# ports, instead of the default. See also the <VirtualHost># directive.## Change this to Listen on specific IP addresses as shown below to # prevent Apache from glomming onto all bound IP addresses.##Listen 12.34.56.78:80Listen 80## Dynamic Shared Object (DSO) Support## To be able to use the functionality of a module which was built as a DSO you# have to place corresponding `LoadModule' lines at this location so the# directives contained in it are actually available _before_ they are used.# Statically compiled modules (those listed by `httpd -l') do not need# to be loaded here.## Example:# LoadModule foo_module modules/mod_foo.so#LoadModule actions_module modules/mod_actions.soLoadModule alias_module modules/mod_alias.soLoadModule asis_module modules/mod_asis.soLoadModule auth_basic_module modules/mod_auth_basic.so#LoadModule auth_digest_module modules/mod_auth_digest.so#LoadModule authn_alias_module modules/mod_authn_alias.so#LoadModule authn_anon_module modules/mod_authn_anon.so#LoadModule authn_dbd_module modules/mod_authn_dbd.so#LoadModule authn_dbm_module modules/mod_authn_dbm.soLoadModule authn_default_module modules/mod_authn_default.soLoadModule authn_file_module modules/mod_authn_file.so#LoadModule authnz_ldap_module modules/mod_authnz_ldap.so#LoadModule authz_dbm_module modules/mod_authz_dbm.soLoadModule authz_default_module modules/mod_authz_default.soLoadModule authz_groupfile_module modules/mod_authz_groupfile.soLoadModule authz_host_module modules/mod_authz_host.so#LoadModule authz_owner_module modules/mod_authz_owner.soLoadModule authz_user_module modules/mod_authz_user.soLoadModule autoindex_module modules/mod_autoindex.so#LoadModule cache_module modules/mod_cache.so#LoadModule cern_meta_module modules/mod_cern_meta.soLoadModule cgi_module modules/mod_cgi.so#LoadModule charset_lite_module modules/mod_charset_lite.so#LoadModule dav_module modules/mod_dav.so#LoadModule dav_fs_module modules/mod_dav_fs.so#LoadModule dav_lock_module modules/mod_dav_lock.so#LoadModule dbd_module modules/mod_dbd.soLoadModule deflate_module modules/mod_deflate.soLoadModule dir_module modules/mod_dir.so#LoadModule disk_cache_module modules/mod_disk_cache.so#LoadModule dumpio_module modules/mod_dumpio.soLoadModule env_module modules/mod_env.soLoadModule expires_module modules/mod_expires.so#LoadModule ext_filter_module modules/mod_ext_filter.so#LoadModule file_cache_module modules/mod_file_cache.soLoadModule filter_module modules/mod_filter.soLoadModule headers_module modules/mod_headers.so#LoadModule ident_module modules/mod_ident.so#LoadModule imagemap_module modules/mod_imagemap.soLoadModule include_module modules/mod_include.so#LoadModule info_module modules/mod_info.soLoadModule isapi_module modules/mod_isapi.so#LoadModule ldap_module modules/mod_ldap.so#LoadModule logio_module modules/mod_logio.soLoadModule log_config_module modules/mod_log_config.so#LoadModule log_forensic_module modules/mod_log_forensic.so#LoadModule mem_cache_module modules/mod_mem_cache.soLoadModule mime_module modules/mod_mime.so#LoadModule mime_magic_module modules/mod_mime_magic.soLoadModule negotiation_module modules/mod_negotiation.so#LoadModule proxy_module modules/mod_proxy.so#LoadModule proxy_ajp_module modules/mod_proxy_ajp.so#LoadModule proxy_balancer_module modules/mod_proxy_balancer.so#LoadModule proxy_connect_module modules/mod_proxy_connect.so#LoadModule proxy_ftp_module modules/mod_proxy_ftp.so#LoadModule proxy_http_module modules/mod_proxy_http.so#LoadModule proxy_scgi_module modules/mod_proxy_scgi.so#LoadModule reqtimeout_module modules/mod_reqtimeout.soLoadModule rewrite_module modules/mod_rewrite.soLoadModule setenvif_module modules/mod_setenvif.so#LoadModule speling_module modules/mod_speling.soLoadModule ssl_module modules/mod_ssl.so#LoadModule status_module modules/mod_status.so#LoadModule substitute_module modules/mod_substitute.so#LoadModule unique_id_module modules/mod_unique_id.so#LoadModule userdir_module modules/mod_userdir.so#LoadModule usertrack_module modules/mod_usertrack.so#LoadModule version_module modules/mod_version.so#LoadModule vhost_alias_module modules/mod_vhost_alias.so<IfModule !mpm_netware_module><IfModule !mpm_winnt_module>## If you wish httpd to run as a different user or group, you must run# httpd as root initially and it will switch.  ## User/Group: The name (or #number) of the user/group to run httpd as.# It is usually good practice to create a dedicated user and group for# running httpd, as with most system services.#User daemonGroup daemon</IfModule></IfModule># 'Main' server configuration## The directives in this section set up the values used by the 'main'# server, which responds to any requests that aren't handled by a# <VirtualHost> definition.  These values also provide defaults for# any <VirtualHost> containers you may define later in the file.## All of these directives may appear inside <VirtualHost> containers,# in which case these default settings will be overridden for the# virtual host being defined.### ServerAdmin: Your address, where problems with the server should be# e-mailed.  This address appears on some server-generated pages, such# as error documents.  e.g. admin@your-domain.com#ServerAdmin scp1688@163.com## ServerName gives the name and port that the server uses to identify itself.# This can often be determined automatically, but we recommend you specify# it explicitly to prevent problems during startup.## If your host doesn't have a registered DNS name, enter its IP address here.#ServerName www.phpStudy.net:80## DocumentRoot: The directory out of which you will serve your# documents. By default, all requests are taken from this directory, but# symbolic links and aliases may be used to point to other locations.#DocumentRoot  "D:\WAMP\WWW"## Each directory to which Apache has access can be configured with respect# to which services and features are allowed and/or disabled in that# directory (and its subdirectories). ## First, we configure the "default" to be a very restrictive set of # features.  #<Directory />  Options FollowSymLinks    AllowOverride All    Order deny,allow    Allow from all</Directory>## Note that from this point forward you must specifically allow# particular features to be enabled - so if something's not working as# you might expect, make sure that you have specifically enabled it# below.### This should be changed to whatever you set DocumentRoot to.#<Directory "D:\WAMP\WWW">    #    # Possible values for the Options directive are "None", "All",    # or any combination of:    #   Indexes Includes FollowSymLinks SymLinksifOwnerMatch ExecCGI MultiViews    #    # Note that "MultiViews" must be named *explicitly* --- "Options All"    # doesn't give it to you.    #    # The Options directive is both complicated and important.  Please see    # http://httpd.apache.org/docs/2.2/mod/core.html#options    # for more information.    #    Options FollowSymLinks    #    # AllowOverride controls what directives may be placed in .htaccess files.    # It can be "All", "None", or any combination of the keywords:    #   Options FileInfo AuthConfig Limit    #    AllowOverride All    #    # Controls who can get stuff from this server.    #    Order allow,deny    Allow from all</Directory>## DirectoryIndex: sets the file that Apache will serve if a directory# is requested.#<IfModule dir_module>    DirectoryIndex index.html index.php index.htm</IfModule>## The following lines prevent .htaccess and .htpasswd files from being # viewed by Web clients. #<FilesMatch "^\.ht">    Order allow,deny    Deny from all    Satisfy All</FilesMatch>## ErrorLog: The location of the error log file.# If you do not specify an ErrorLog directive within a <VirtualHost># container, error messages relating to that virtual host will be# logged here.  If you *do* define an error logfile for a <VirtualHost># container, that host's errors will be logged there and not here.#ErrorLog "logs/error.log"## LogLevel: Control the number of messages logged to the error_log.# Possible values include: debug, info, notice, warn, error, crit,# alert, emerg.#LogLevel warn<IfModule log_config_module>    #    # The following directives define some format nicknames for use with    # a CustomLog directive (see below).    #    LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\"" combined    LogFormat "%h %l %u %t \"%r\" %>s %b" common    <IfModule logio_module>      # You need to enable mod_logio.c to use %I and %O      LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" \"%{User-Agent}i\" %I %O" combinedio    </IfModule>    #    # The location and format of the access logfile (Common Logfile Format).    # If you do not define any access logfiles within a <VirtualHost>    # container, they will be logged here.  Contrariwise, if you *do*    # define per-<VirtualHost> access logfiles, transactions will be    # logged therein and *not* in this file.    #    CustomLog "logs/access.log" common    #    # If you prefer a logfile with access, agent, and referer information    # (Combined Logfile Format) you can use the following directive.    #    #CustomLog "logs/access.log" combined</IfModule><IfModule alias_module>    #    # Redirect: Allows you to tell clients about documents that used to     # exist in your server's namespace, but do not anymore. The client     # will make a new request for the document at its new location.    # Example:    # Redirect permanent /foo http://www.phpStudy.net/bar    #    # Alias: Maps web paths into filesystem paths and is used to    # access content that does not live under the DocumentRoot.    # Example:    # Alias /webpath /full/filesystem/path    #    # If you include a trailing / on /webpath then the server will    # require it to be present in the URL.  You will also likely    # need to provide a <Directory> section to allow access to    # the filesystem path.    #    # ScriptAlias: This controls which directories contain server scripts.     # ScriptAliases are essentially the same as Aliases, except that    # documents in the target directory are treated as applications and    # run by the server when requested rather than as documents sent to the    # client.  The same rules about trailing "/" apply to ScriptAlias    # directives as to Alias.    #    ScriptAlias /cgi-bin/ "D:/WAMP/apache/cgi-bin/"</IfModule><IfModule cgid_module>    #    # ScriptSock: On threaded servers, designate the path to the UNIX    # socket used to communicate with the CGI daemon of mod_cgid.    #    #Scriptsock logs/cgisock</IfModule>## "D:/WAMP/apache/cgi-bin" should be changed to whatever your ScriptAliased# CGI directory exists, if you have that configured.#<Directory "D:/WAMP/apache/cgi-bin">    AllowOverride All    Options None    Order allow,deny    Allow from all</Directory>## DefaultType: the default MIME type the server will use for a document# if it cannot otherwise determine one, such as from filename extensions.# If your server contains mostly text or HTML documents, "text/plain" is# a good value.  If most of your content is binary, such as applications# or images, you may want to use "application/octet-stream" instead to# keep browsers from trying to display binary files as though they are# text.#DefaultType text/plain<IfModule mime_module>    #    # TypesConfig points to the file containing the list of mappings from    # filename extension to MIME-type.    #    TypesConfig conf/mime.types    #    # AddType allows you to add to or override the MIME configuration    # file specified in TypesConfig for specific file types.    #    #AddType application/x-gzip .tgz    #    # AddEncoding allows you to have certain browsers uncompress    # information on the fly. Note: Not all browsers support this.    #    #AddEncoding x-compress .Z    #AddEncoding x-gzip .gz .tgz    #    # If the AddEncoding directives above are commented-out, then you    # probably should define those extensions to indicate media types:    #    AddType application/x-compress .Z    AddType application/x-gzip .gz .tgz    #    # AddHandler allows you to map certain file extensions to "handlers":    # actions unrelated to filetype. These can be either built into the server    # or added with the Action directive (see below)    #    # To use CGI scripts outside of ScriptAliased directories:    # (You will also need to add "ExecCGI" to the "Options" directive.)    #    #AddHandler cgi-script .cgi    # For type maps (negotiated resources):    #AddHandler type-map var    #    # Filters allow you to process content before it is sent to the client.    #    # To parse .shtml files for server-side includes (SSI):    # (You will also need to add "Includes" to the "Options" directive.)    #    #AddType text/html .shtml    #AddOutputFilter INCLUDES .shtml</IfModule>## The mod_mime_magic module allows the server to use various hints from the# contents of the file itself to determine its type.  The MIMEMagicFile# directive tells the module where the hint definitions are located.##MIMEMagicFile conf/magic## Customizable error responses come in three flavors:# 1) plain text 2) local redirects 3) external redirects## Some examples:#ErrorDocument 500 "The server made a boo boo."#ErrorDocument 404 /missing.html#ErrorDocument 404 "/cgi-bin/missing_handler.pl"#ErrorDocument 402 http://www.phpStudy.net/subscription_info.html### MaxRanges: Maximum number of Ranges in a request before# returning the entire resource, or 0 for unlimited# Default setting is to accept 200 Ranges#MaxRanges 0## EnableMMAP and EnableSendfile: On systems that support it, # memory-mapping or the sendfile syscall is used to deliver# files.  This usually improves server performance, but must# be turned off when serving from networked-mounted # filesystems or if support for these functions is otherwise# broken on your system.##EnableMMAP off#EnableSendfile off# Supplemental configuration## The configuration files in the conf/extra/ directory can be # included to add extra features or to modify the default configuration of # the server, or you may simply copy their contents here and change as # necessary.# Server-pool management (MPM specific)Include conf/extra/httpd-mpm.conf# Multi-language error messages#Include conf/extra/httpd-multilang-errordoc.conf# Fancy directory listings#Include conf/extra/httpd-autoindex.conf# Language settings#Include conf/extra/httpd-languages.conf# User home directories#Include conf/extra/httpd-userdir.conf# Real-time info on requests and configuration#Include conf/extra/httpd-info.conf# Virtual hostsInclude conf/extra/httpd-vhosts.conf# Local access to the Apache HTTP Server Manual#Include conf/extra/httpd-manual.conf# Distributed authoring and versioning (WebDAV)#Include conf/extra/httpd-dav.conf# Various default settings#Include conf/extra/httpd-default.confInclude conf/phpmyadmin.confInclude conf/vhosts.conf# Secure (SSL/TLS) connections#Include conf/extra/httpd-ssl.conf## Note: The following must must be present to support#       starting without SSL on platforms with no /dev/random equivalent#       but a statically compiled-in mod_ssl.#LoadFile "D:/WAMP/PHP/php5ts.dll"LoadModule php5_module "D:/WAMP/PHP/php5apache2_2.dll"<IfModule php5_module>    PHPIniDir "D:/WAMP/PHP/"    AddType application/x-httpd-php .php .phtml</IfModule>LoadFile "D:/WAMP/PHP/libmysql.dll"LoadFile "D:/WAMP/PHP/libmcrypt.dll"<IfModule ssl_module>SSLRandomSeed startup builtinSSLRandomSeed connect builtin</IfModule><IfModule mod_Rewrite.c>RewriteEngine OnRewriteRule ^(.*)/archiver/((fid|tid)-[\w\-]+\.html)$ $1/archiver/index.php?$2RewriteRule ^(.*)/forum-([0-9]+)-([0-9]+)\.html$ $1/forumdisplay.php?fid=$2&page=$3RewriteRule ^(.*)/thread-([0-9]+)-([0-9]+)-([0-9]+)\.html$ $1/viewthread.php?tid=$2&extra=page\%3D$4&page=$3RewriteRule ^(.*)/space-(username|uid)-(.+)\.html$ $1/space.php?$2=$3RewriteRule ^(.*)/tag-(.+)\.html$ $1/tag.php?name=$2</IfModule><ifmodule mod_deflate.c>AddOutputFilterByType DEFLATE text/html text/plain text/xml text/css text/javascript application/x-javascript application/javascript</ifmodule>TraceEnable off<IfModule deflate_module>SetOutputFilter DEFLATE# Don’t compress images and otherSetEnvIfNoCase Request_URI .(?:gif|jpe?g|png)$ no-gzip dont-varySetEnvIfNoCase Request_URI .(?:exe|t?gz|zip|bz2|sit|rar)$ no-gzip dont-varySetEnvIfNoCase Request_URI .(?:pdf|doc)$ no-gzip dont-varyAddOutputFilterByType DEFLATE text/html text/plain text/xml text/cssAddOutputFilterByType DEFLATE application/x-javascript</IfModule> ------------------------- Relocalhost和127.0.0.1都无法正常访问 哦, 我找到了, 默认目录修改之后这里没有跟上, 感谢版主的帮助, 谢谢!
tunawt 2019-12-02 02:35:55 0 浏览量 回答数 0

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【精品问答】python技术1000问(2)

为了方便python开发者快速找到相关技术问题和答案,开发者社区策划了python技术1000问内容,包含最基础的如何学python、实践中遇到的技术问题、python面试等维度内容。 我们会以每天至少50条的...
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