mysql

Export to csv/excel way to include leading zero [duplicate]

由 无人久伴 提交于 2021-02-07 07:11:05
问题 This question already has answers here : CSV for Excel, Including Both Leading Zeros and Commas (12 answers) Closed 6 years ago . Exporting select query data from mysql to csv & opening with excel, the leading zeros are gone. Although the column is varchar, when the data gets exported, it writes like 4567 instead of 04567, is there a way to preserve the leading zero while exporting to csv? 回答1: You need to wrap the number in double quotes like: ...,"04567",... , but then it will be

Export to csv/excel way to include leading zero [duplicate]

由 社会主义新天地 提交于 2021-02-07 07:08:41
问题 This question already has answers here : CSV for Excel, Including Both Leading Zeros and Commas (12 answers) Closed 6 years ago . Exporting select query data from mysql to csv & opening with excel, the leading zeros are gone. Although the column is varchar, when the data gets exported, it writes like 4567 instead of 04567, is there a way to preserve the leading zero while exporting to csv? 回答1: You need to wrap the number in double quotes like: ...,"04567",... , but then it will be

Export to csv/excel way to include leading zero [duplicate]

由 倾然丶 夕夏残阳落幕 提交于 2021-02-07 07:07:23
问题 This question already has answers here : CSV for Excel, Including Both Leading Zeros and Commas (12 answers) Closed 6 years ago . Exporting select query data from mysql to csv & opening with excel, the leading zeros are gone. Although the column is varchar, when the data gets exported, it writes like 4567 instead of 04567, is there a way to preserve the leading zero while exporting to csv? 回答1: You need to wrap the number in double quotes like: ...,"04567",... , but then it will be

Getting broken pipe when passing mysql connection to a python thread

由 假如想象 提交于 2021-02-07 06:44:13
问题 I'm trying to pass a mysql connection to a thread in python. If i do the initialization of the mysql inside the worker class, there is no error. However, it might be costly for the connection so I tried just passing the mysql connection from the caller function (see code below). But this keeps throwing this error: (2006, "MySQL server has gone away (BrokenPipeError(32, 'Broken pipe')) Any idea why? I think its because the way we pass the mysql connection def worker(db): """ Distributes the

CentOS 7.2 yum方式安装MySQL 5.7

由 佐手、 提交于 2021-02-07 06:38:19
CentOS 7之后的版本yum的默认源中使用MariaDB替代原先MySQL，因此安装方式较为以往有一些改变： 下载mysql的源 wget http://dev.mysql.com/get/mysql57-community-release-el7-7.noarch.rpm 安装yum库 yum localinstall -y mysql57-community-release-el7-7.noarch.rpm 安装MySQL yum install -y mysql-community-server 启动MySQL服务 systemctl start mysqld.service MySQL5.7加强了root用户的安全性，因此在第一次安装后会初始化一个随机密码，以下为查看初始随机密码的方式(此命令只能用于查询初始密码) grep 'temporary password' /var/log/mysqld.log 结果如下： 使用初始随机密码登录后MySQL会强制要求修改密码，否则无法正常使用，（密码必须包含小写、大写字母及特殊字符，当然也有其他方法不受此限制，再次不多做描述），修改方法如下： SET PASSWORD = PASSWORD('your new password'); ALTER USER 'root'@'localhost' PASSWORD EXPIRE

Missing database connections eclipse

由 感情迁移 提交于 2021-02-07 06:38:17
问题 I am missing MySQL and other connection profiles in eclipse so that JBoss server throws errors. Unable to post image because of reputation ;) I do have only: Generic JDBC HSQLDB Using Eclipse Kepler and jboss eap 6.1 - already established MySQL server on my PC. 回答1: First, if you are going to do any Java web application development on eclipse, please make sure you are using Eclipse IDE for Java EE Developers. This will get most relevant plugins already installed and prevents you from

MySQL Data Provider Not Showing in Entity Data Model Wizard

由 懵懂的女人 提交于 2021-02-07 06:24:53
问题 I am creating an MVC application with MySQL as backend. I am planning to use Entity Framework to work with this database. I already have a database so need to generate models from a database Environment: MySQL Server 5.7.21 MySQL for Visual Studio 1.27 Connector/NET 6.10.5 Visual Studio 2015 To Reproduce Issue: Step 1: Add new item 'Ado.net Entity Data Model' Step 2: Selected 'EF Designer from database' and click 'Next' Step 3: Clicked 'New Connection' There is no mysql connector available.

MySQL Data Provider Not Showing in Entity Data Model Wizard

由 那年仲夏 提交于 2021-02-07 06:24:47
问题 I am creating an MVC application with MySQL as backend. I am planning to use Entity Framework to work with this database. I already have a database so need to generate models from a database Environment: MySQL Server 5.7.21 MySQL for Visual Studio 1.27 Connector/NET 6.10.5 Visual Studio 2015 To Reproduce Issue: Step 1: Add new item 'Ado.net Entity Data Model' Step 2: Selected 'EF Designer from database' and click 'Next' Step 3: Clicked 'New Connection' There is no mysql connector available.

Table name specified twice both as a target for update and separate source for data

由 旧时模样 提交于 2021-02-07 06:17:05
问题 Update table Set class = 0 Where TOTAL_HOURS = (SELECT min (TOTAL_HOURS) from tutions); Produced Error: Table name specified twice both as a target for update and separate source for data. How can I fix this? 回答1: I am guessing you are trying to update tutions with tutions. Make a nested subquery so that MySQL materializes it and is no longer the same table. Try this: Update tutions Set class = 0 Where TOTAL_HOURS = (select * from (SELECT min (TOTAL_HOURS) from tutions) t); 来源： https:/

PYTHON: Update MULTIPLE COLUMNS with python variables

由 生来就可爱ヽ(ⅴ＜●) 提交于 2021-02-07 06:13:29
问题 I'm trying to write a valid mysql statement that would allow me to update multiple columns in one record with values provided as python variables. My statement would look like this: db = MySQLdb.connect(host="localhost", user="user", passwd="password", db="dbname") cursor = db.cursor() sql_update = "UPDATE table_name SET field1=%s, field2=%s, field3=%s, field4=%s, field5=%s, field6=%s, field7=%s, field8=%s, field9=%s, field10=%s WHERE id=%s" % (var1, var2, var3, var4, var5, var6, var7, var8,
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