I am moving all my websites to one server and I want to know if the information_schema can be omitted because I have multiple different websites from different servers. < div class="content-split"
Tag: mysql
PHP code for obtaining data from the MYSQL server from the mobile application
My PHP code gets data from the mysql server to show which is suitable for the website, but I want to use the same method to make a mobile application,
is it suitable for a mobile application? Beca
Try to access my Ruby project – Loaderror related to MySQL
I am trying to access my first ruby project. Navigate to the correct directory and type:
$rails server
I received the following error message:
/Users/Rozey/.rvm/gems/ruby -1.9.2
Mysql log binlog introduction
???? MySql will generate some logs during the running process, and now for the consistency of the master-slave data synchronization problem, as well as database recovery, database optimization, dat
What is the fastest way to find a big table in radius mysql (latitude longitude)
Currently I have several tables with 100k rows. I am trying to find the following data.
SELECT
* , SQRT(POW(69.1 * (latitude-‘49.1044302’), 2) + POW(69.1 * (‘-122.801094’-longitude) * COS(lat
Mysql – How to choose a row with the current date time?
I tried to select only today’s records from the database table.
Currently I use
SELECT * FROM `table` WHERE (`timestamp`> DATE_SUB(now(), INTERVAL 1 DAY)); But it needs the results of t
MySQL character set
1. Character set and verification rules Character set is a set of symbols and codes, and collation is a set of rules for comparing characters in a character set. That is, the collation of the chara
MySQL case: calculation ring ratio
select a.day_num as “Serial Number”,
a.create_time as “Shelf time”,
a.clue_num as “The amount of vehicles on the shelves”,
((a.clue_num/b.clue_num)-1) as “Chain Ratio”
from
(
select cast(
MySQL index
Summary:
This is an article about MySQL, mainly introducing MySQL index
# #1. Introduction to Indexes
An index is also called a key in MySQL. It is a data structure used by the st
Is MySQL have “analysis function” in Oracle?
I am looking for analysis functions like PARTITION BY in MySQL (see docs for more information)
Does it exist ?
Update 04/2018
MySQL 8.0 now supports window functions.
I am l