MySQL Horizontal Split (Reading Notes) and mysql Reading Notes1. Introduction to horizontal split
In general, a simple horizontal split mainly refers to distributing a table with extremely ordinary access to multiple tables according to certain
The function below implements the processing of strings like an array.
one, using a temporary table as an array
Copy Code code as follows:
Create function F_split (@c varchar), @split varchar (2))
Returns @t table (col varchar (
Compared with horizontal split, vertical split is easier to implement. Vertical Split means to split different business data in the database into different databases. Vertical Split can be very good
Compared with horizontal split, vertical split is
1, the introduction of horizontal splittingIn general, simple horizontal slicing is the main way to spread an extremely mundane table into multiple tables, with a subset of the data in each table, according to some rule of a field.In simple terms,
The examples in this article describe MySQL interception and split string function usage. Share to everyone for your reference, specific as follows:
First of all, intercept String functions:
SUBSTRING (commentid,9)
This is very
MySQL Vertical Split (Reading Notes)1. Vertical Split
Compared with horizontal split, vertical split is easier to implement. Vertical Split means to split different business data in the database into different databases. Vertical splitting can
1.explode Method Description
The Explode method allows a string to be split into groups by one string as a boundary point.
Array explode (string $delimiter, string $string [, int $limit])
Returns an array of strings, each of which is a substring of
MySQL stored procedure SP explanation
1. Introduction to stored procedures
The commonly used Operating Database Language SQL statements must be compiled and then executed before execution. the Stored Procedure (Stored Procedure) is a set of SQL
1. Introduction to stored procedures
The commonly used operating database language SQL statements must be compiled and then executed before execution. The Stored Procedure (Stored Procedure) is a set of SQL statements for specific functions, after
[Arrangement] MySQL autocommit bitsCN.com
[Arrangement] MySQL autocommit
By default, mysql enables auto commit. You can run the following command to view the settings at the session level and global level:
01mysql> select @@session.autocommit;02+-
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