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How to find duplicates in 2 columns not 1
I have a MySQL database table with two columns that interest me. Individually they can each have duplicates, but they should never have a duplicate of BOTH of them having the same value.
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MySQL Insert into multiple tables? (Database normalization?)
I tried searching a way to insert information in multiple tables in the same query, but found out it's impossible?
So I want to insert it by simply using multiple queries i.e;
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Illegal mix of collations MySQL Error
...BASE your_database_name CHARACTER SET utf8 COLLATE utf8_general_ci;
ALTER TABLE your_table_name CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci;
MySQL sneaks swedish in there sometimes for no sensible reason.
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How to completely remove borders from HTML table
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<table cellspacing="0" cellpadding="0">
And in css:
table {border: none;}
EDIT:
As iGEL noted, this solution is officially deprecated (still works though), so if you are starting from scratch, you should go with the j...
Adding an identity to an existing column
I need to change the primary key of a table to an identity column, and there's already a number of rows in table.
19 Answe...
Rails migration for change column
We have script/generate migration add_fieldname_to_tablename fieldname:datatype syntax for adding new columns to a model.
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MySQL一次主从数据不一致的问题解决过程 - 数据库(内核) - 清泛网 - 专注C/...
...从服务器数据一致性的核对与修复 简单描述下过程
用pt-table-checksum校验数据一致性 描述工具原理
用pt-table-sync修复不一致的数据 描述了工具原理
操作过程
只把过程和用到的东西解释了下，有些参数选项等还需要查阅文档...
What's the bad magic number error?
...or run the command above, after verifying you're not doing something regrettable.
– michael
Aug 11 '16 at 23:45
9
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Using union and order by clause in mysql
...I am fetching different types of record based on different criteria from a table based on distance for a search on my site.
The first select query returns data related to the exact place search .
The 2nd select query returns data related to distance within 5 kms from the place searched.
The 3rd sele...
Is there an equivalent of CSS max-width that works in HTML emails?
...perly in all widely used email clients. I'm wrapping the whole email in a table, and I'd like it to have a width that is up to 98% of the available width, but no greater than 800 pixels. Like this:
<table style="width:98%; max-width:800px;">
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