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How to define a custom ORDER BY order in mySQL
In MySQL how do I define a custom sorting order.
4 Answers
4
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How to split the name string in mysql?
How to split the name string in mysql ?
16 Answers
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MySQL - Get row number on select
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@Jared, MySQL syntax just needs something to be there. It can be anything, even x and y.
– Pacerier
Apr 24 '15 at 11:10
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What is the difference between tinyint, smallint, mediumint, bigint and int in MySQL?
... is the difference between tinyint, smallint, mediumint, bigint and int in MySQL?
6 Answers
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App Inventor 2 接入百度网盘API · App Inventor 2 中文网
...框】
接入文档
使用Web浏览框，里面要输入网盘用户名密码，成功后返回的url中拿出access_token
这里使用简单模式，回调网页，在回调后的URL中拿出access_token，后面操作都需要它：
http://openapi.baidu.com/oauth/2.0/authorize?display=mobil...
MySQL - SELECT WHERE field IN (subquery) - Extremely slow why?
...B and you only select indexed fields (and things are not too complex) than MySQL will resolve your query using only the indexes, speeding things way up.
General solution for 90% of your IN (select queries
Use this code
SELECT * FROM sometable a WHERE EXISTS (
SELECT 1 FROM sometable b
WHERE...
Random record in ActiveRecord
...selected entries. (Be aware that it's RANDOM() in PostgreSQL and RAND() in MySQL ... not as portable as you may want it to be.)
– Florian Pilz
Jun 16 '11 at 13:17
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How to store arrays in MySQL?
I have two tables in MySQL. Table Person has the following columns:
7 Answers
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Which is fastest? SELECT SQL_CALC_FOUND_ROWS FROM `table`, or SELECT COUNT(*)
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It depends. See the MySQL Performance Blog post on this subject: To SQL_CALC_FOUND_ROWS or not to SQL_CALC_FOUND_ROWS?
Just a quick summary: Peter says that it depends on your indexes and other factors. Many of the comments to the post seem to...
How to do a batch insert in MySQL
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From the MySQL manual
INSERT statements that use VALUES
syntax can insert multiple rows. To do
this, include multiple lists of column
values, each enclosed within
parentheses and separated by commas.
Example:
INSERT IN...