type of table

First of all, thank you QQ group Big: The original self-dozen code:Percent Column_type: binary MySQL data type% input values are:>,>,>,>% return value corresponding to int, decimal, varchar, float%%get_column_type (column_type)->case re : Run

-- Obtain the table primary key and typeSelect acc. column_name, ATC. data_typeFrom all_constraints AC, all_cons_columns ACC, all_tab_columns ATCWhere AC. table_name = upper ('table name ')And AC. constraint_type = 'P'And AC. constraint_name = acc.

Relational table type, which is a very powerful type. We can think of this type as an array. Just an array of C languages, which can only be indexed by a positive integer; in Lua, you can use any type of valueTo count the index of the group , but

The tree information in compiere242 (Version: d) is extracted from the corresponding database table. Table functions are divided into the following three types: 1. tables that store tree information This type of table records the overall description

Work with data tablesBasic Database OperationsWith MySQL, currently (version 3.23) You can choose between three basic database table types. When you create a table, you can tell MySQL which table type it should use for the table. MySQL will always

"InnoDB and MyISAM Difference" "http://jeck2046.blog.51cto.com/184478/90499"InnoDB and MyISAM are the two most common table types used by many people when using MySQL, both of which have pros and cons, depending on the application. The basic

Typically, a database is a collection of data, and a database can be a collection of files on a memory or a collection of some memory data.What we usually call MySQL database, SQL Server database and so on is actually a database management system,

What is a MySQL databaseTypically, a database is a collection of data, and a database can be a collection of files on a memory or a collection of some memory data.What we usually call MySQL database, SQL Server database and so on is actually a

MySQL as the most commonly used database, often encountered a variety of problems. What we're going to say today is the changes to the table storage engine. There are three ways, the list is as follows. 1. True connection modification. It is slower

1 Database Basics1. Data abstraction: Physical abstraction, conceptual abstraction, view-level abstraction, internal mode, pattern, outer modeDatabase system Level Three abstraction refers to: View-level abstraction: Abstract the real world

MySQL Storage engine (table type): MySQL database: In general, a database is a collection of data, specific to a computer database can make a collection of some files on the memory or some memory The collection of memory data for the data. The MySQL

What is a MySQL databaseTypically, a database is a collection of data, and a database can be a collection of files on a memory or a collection of some memory data.What we usually call MySQL database, SQL Server database and so on is actually a

What is a MySQL databaseTypically, a database is a collection of data, and a database can be a collection of files on a memory or a collection of some memory data.What we usually call MySQL database, SQL Server database and so on is actually a

What is a MySQL database? Typically, a database is a collection of data, and a database can be a collection of files on a memory or a collection of some memory data. We usually say that the MySQL database, SQL Server database, etc. is actually a

What is a MySQL databaseTypically, a database is a collection of data, and a database can be a collection of files on a memory or a collection of some memory data.What we usually call MySQL database, SQL Server database and so on is actually a

We often place some tree structures in a table, such as genealogy and menus. The biggest problem with this type of table is that when we need to query all the sub-records of a certain record, it is difficult to use a simple SQL statement. We can

This is a creation in Article, where the information may have evolved or changed. Kingshard by Time table function Introduction In the document, we mainly introduce the kingshard of hash and range, and recently developed the sub-table mode by Time

Introduction of CDCUsually in the case of a small amount of data, when we load all the data from one data source into the target database, we can take the following policy: first, the target database's data are all emptied out, and then all

Preface, what is the storage engineTable ===> files created in the Library ===> folder library in MySQLThere are different types of files that we use to store data in real life, and each file type corresponds to a different processing mechanism: For

How can I restore/replicate the INNODB data table by copying the frm file directly? in the use of MySQL5.0, often there are some strange strange problems, resulting in the service can not start, had to reinstall MySQL, but so the original database