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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)
...
Suppress warning messages using mysql from within Terminal, but password written in bash script
When I tried running the following command on MySQL from within Terminal:
25 Answers
2...
Optimal way to concatenate/aggregate strings
...com/en-us/sql/t-sql/functions/string-agg-transact-sql
GROUP_CONCAT() in MySQL
http://dev.mysql.com/doc/refman/5.7/en/group-by-functions.html#function_group-concat
(Thanks to @Brianjorden and @milanio for Azure update)
Example Code:
select Id
, STRING_AGG(Name, ', ') Names
from Demo
group by I...
error: 'Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)' — Miss
...roblem started off with me not being able to log in as root any more on my mysql install. I was attempting to run mysql without passwords turned on... but whenever I ran the command
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Is there a REAL performance difference between INT and VARCHAR primary keys?
...e performance difference between using INT vs. VARCHAR as a primary key in MySQL? I'd like to use VARCHAR as the primary key for reference lists (think US States, Country Codes) and a coworker won't budge on the INT AUTO_INCREMENT as a primary key for all tables.
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How to import a single table in to mysql database using command line
...
Linux :
In command line
mysql -u username -p databasename < path/example.sql
put your table in example.sql
Import / Export for single table:
Export table schema
mysqldump -u username -p databasename tableName > path/example.sql
This ...
How to take backup of a single table in a MySQL database?
By default, mysqldump takes the backup of an entire database. I need to backup a single table in MySQL. Is it possible? How do I restore it?
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mysql blob大小配置介绍 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...理器（如数据库管理器）不去理会文件是什么，而是关心如何去处理它。但也有专家强调，这种处理大数据对象的方法是把双刃剑，它有可能引发一些问题，如存储的二进制文件过大，会使数据库的性能下降。在数据库中存放体...
Create new user in MySQL and give it full access to one database
I want to create a new user in MySQL and give it full access only to one database, say dbTest , that I create with a command like create database dbTest; . What would be the MySQL commands to do that?
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据说智商高的人都这样设密码... - 轻松一刻 - 清泛网 - 专注C/C++及内核技术
据说智商高的人都这样设密码...密码，一个私密又纠结的东西。既不能设太简单让别人知道，又不能搞太复杂，最后连自己都忘了。大多数人会选用自己或伴侣、家人、朋友的生日...密码，一个私密又纠结的东西。既不能设太简...