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MySQL Update Inner Join tables query
I have no idea what the problem is. Using MySQL 5.0 I get a compile error when attempting to run the following MySQL update query:
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Best lightweight web server (only static content) for Windows [closed]
...r the Windows OS. It includes the latest versions of Apache2, Perl5, PHP5, MySQL5, phpMyAdmin and more. No installation required. No registry dust. Just unpack and fire up.
– Piotr
Apr 14 '16 at 13:35
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MySQL load NULL values from CSV data
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MySQL manual says:
When reading data with LOAD DATA
INFILE, empty or missing columns are
updated with ''. If you want a NULL
value in a column, you should use \N
in the data file. The literal word
“NULL” ma...
How to Get True Size of MySQL Database?
I would like to know how much space does my MySQL database use, in order to select a web host.
I found the command SHOW TABLE STATUS LIKE 'table_name' so when I do the query, I get something like this:
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领域驱动设计系列（二）:领域Model？ - 更多技术 - 清泛网 - 专注C/C++及内核技术
...易让大家搞糊涂。 我觉得先抛开这些概念，后面再来说如何设计聚合，先简单来说。
模型
过去，我们在多层设计里定义了很多Model, 数据库的Model(DB Entity), 然后为了不依赖数据库，我们有设计了业务的Domain Model, 同时我们又设...
Error 1046 No database Selected, how to resolve?
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You need to tell MySQL which database to use:
USE database_name;
before you create a table.
In case the database does not exist, you need to create it as:
CREATE DATABASE database_name;
followed by:
USE database_name;
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Using column alias in WHERE clause of MySQL query produces an error
...is
executed, the column value may not yet
be determined.
Copied from MySQL documentation
As pointed in the comments, using HAVING instead may do the work. Make sure to give a read at this WHERE vs HAVING though.
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What MySQL data type should be used for Latitude/Longitude with 8 decimal places?
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DECIMAL is the MySQL data-type for exact arithmetic. Unlike FLOAT its precision is fixed for any size of number, so by using it instead of FLOAT you might avoid precision errors when doing some calculations. If you were just storing and ret...
项目管理实践【五】自动编译和发布网站【Using Visual Studio with Source ...
...【Daily Build Using CruiseControl NET and MSBuild】中，我们讲解了如何使用CCNET+MSBuild 在上一篇教程项目管理实践【三】每日构建【Daily Build Using CruiseControl.NET and MSBuild】 中，我们讲解了如何使用CCNET+MSBuild来自动编译项目，今天我们讲...
Does MySQL foreign_key_checks affect the entire database?
When I execute this command in MySQL:
6 Answers
6
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