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How to change MySQL column definition?

I have a mySQL table called test: 3 Answers 3 ...
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App Inventor 2开发计步器与定位器 - App Inventor 2 中文网 - 清泛IT论坛,有思想、有深度

...编写“健身宝”手机应用程序   3.问题:   (1)如何获取走路步数、距离?   (2)如何计算走路时间?   (3)如何获得当前位置?   (4)如何存储信息?   4.规划:   (1)利用pedometer(计步器)组件...
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Why is it bad style to `rescue Exception => e` in Ruby?

... You can also ADAPTER_ERRORS = [::ActiveRecord::StatementInvalid, PGError, Mysql::Error, Mysql2::Error, ::ActiveRecord::JDBCError, SQLite3::Exception] and then rescue *ADAPTER_ERRORS => e – j_mcnally Feb 27 '14 at 2:19 ...
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Multiple Updates in MySQL

...e, is there a way to update multiple rows at once (as in, in one query) in MySQL? 17 Answers ...
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Creation timestamp and last update timestamp with Hibernate and MySQL

... I would do this using a MySQL trigger so that even if the full entity is not saved or is modified by any external application or manual query, it'll still update these fields. – Webnet Jul 25 '13 at 12:09 ...
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mysql create user if not exists

I have a query to check mysql users list for create new user. 2 Answers 2 ...
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Unique constraint that allows empty values in MySQL

... Yes, you can do this. See the MySQL reference (version 5.5). A UNIQUE index creates a constraint such that all values in the index must be distinct. An error occurs if you try to add a new row with a key value that matches an existing row. For all eng...
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How to select the last record of a table in SQL?

...s something like Sql Server SELECT TOP 1 * FROM Table ORDER BY ID DESC MySql SELECT * FROM Table ORDER BY ID DESC LIMIT 1 share | improve this answer | follow ...
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How to move columns in a MySQL table?

Currently I am having the following MySQL table: Employees (empID, empName, department); 4 Answers ...
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MySQL/SQL: Group by date only on a Datetime column

...son. I would expect it to fail anywhere else as well. Can you confirm that MySQL actually handles this query? – Tomalak Dec 14 '08 at 15:56 1 ...