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Unioning two tables with different number of columns
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2015年硅谷最火的高科技创业公司都有哪些 - 资讯 - 清泛网 - 专注C/C++及内核技术
...算机届最高奖以他命名)艰难的一生，他当年为破译德军密码制作了图灵机为二战胜利作出卓越贡献，挽回几千万人的生命，可在那个时代因为同性恋被判化学阉割，自杀结束了短暂的42岁生命。他的一个伟大贡献就是在人工智能...
Remove ActiveRecord in Rails 3
... line that loads the module for your database. This could be the line gem "mysql" for example.
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What's the difference between session.Merge and session.SaveOrUpdate?
...e.class);
configuration.setProperty("connection.driver_class","com.mysql.jdbc.Driver");
configuration.setProperty("hibernate.connection.url", "jdbc:mysql://localhost:3306/hibernate");
configuration.setProperty("hibernate.connection.username", "...
MySql Table Insert if not exist otherwise update
... re-written using the proper INSERT ... ON DUPLICATE KEY UPDATE syntax for MySQL:
INSERT INTO AggregatedData (datenum,Timestamp)
VALUES ("734152.979166667","2010-01-14 23:30:00.000")
ON DUPLICATE KEY UPDATE
Timestamp=VALUES(Timestamp)
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How to find gaps in sequential numbering in mysql?
... SELECT @var:= max FROM ....; select * from .. WHERE seq < @max; with MySQL variables.
– Moshe L
Mar 25 '19 at 6:08
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Sequelize Unknown column '*.createdAt' in 'field list'
...ize('sequelize_test', 'root', null, {
host: "127.0.0.1",
dialect: 'mysql',
define: {
timestamps: false
}
});
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MySQL Removing Some Foreign keys
I have a table whose primary key is used in several other tables and has several foreign keys to other tables.
11 Answers
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rails + MySQL on OSX: Library not loaded: libmysqlclient.18.dylib
...ty easy; Add the library path in your ~/.bash_profile or ~/.profile file:
MYSQL=/usr/local/mysql/bin
export PATH=$PATH:$MYSQL
export DYLD_LIBRARY_PATH=/usr/local/mysql/lib:$DYLD_LIBRARY_PATH
If it is still not working (this work for me):
sudo ln -s /usr/local/mysql/lib/libmysqlclient.18.dylib /u...
Design patterns or best practices for shell scripts [closed]
...only Table__ParameterException="Table__ParameterException"
readonly Table__MySqlException="Table__MySqlException"
readonly Table__NotInitializedException="Table__NotInitializedException"
readonly Table__AlreadyInitializedException="Table__AlreadyInitializedException"
# an example for module enum co...