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MySQL: Selecting multiple fields into multiple variables in a stored procedure
...T multiple columns into multiple variables within the same select query in MySQL?
3 Answers
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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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Add 2 hours to current time in MySQL?
Which is the valid syntax of this query in MySQL?
5 Answers
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Datetime equal or greater than today in MySQL
...Date) = DATE(NOW())
Read more:
http://www.tomjepson.co.uk/tutorials/36/mysql-select-where-date-today.html
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How to fix “Incorrect string value” errors?
...ame` = `tables`.`table_collation`
;
Last, check your database settings:
mysql> show variables like '%colla%';
mysql> show variables like '%charac%';
If source, transport and destination are UTF-8, your problem is gone;)
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MySQL SELECT WHERE datetime matches day (and not necessarily time)
...n the time since the inital answer in 2012, there have emerged versions of MySQL, where using '23:59:59' as a day end is no longer safe. An updated version should read
SELECT * FROM tablename
WHERE columname >='2012-12-25 00:00:00'
AND columname <'2012-12-26 00:00:00'
The gist of the answe...
那些我印象深刻的建议和教诲 - 杂谈 - 清泛网 - 专注C/C++及内核技术
...负有心人”和“蠢”之间可能连窗户纸都没有，只看个人如何面对了。
多用Google吧
我工作的第一天，项目经理把我叫去说：给你们讲讲JUnit, SVN，Ant, JBuilder的用法，明天开始用。这四样东西我以前都没有接触过，第一反应就是...
Storing SHA1 hash values in MySQL
...estion which occured when I wanted to store the result of a SHA1 hash in a MySQL database:
7 Answers
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Bogus foreign key constraint fail
...Two possibilities:
There is a table within another schema ("database" in mysql terminology) which has a FK reference
The innodb internal data dictionary is out of sync with the mysql one.
You can see which table it was (one of them, anyway) by doing a "SHOW ENGINE INNODB STATUS" after the drop f...
What are the differences between the BLOB and TEXT datatypes in MySQL?
...rted and compared based on the collation of the character set.
http://dev.mysql.com/doc/refman/5.0/en/blob.html
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