mysql data dictionary

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Export MySQL table notes and field notes to do a data dictionary

Often check the data table do not know the meaning of the field, and then to look at the design table to see the meaning of the field, the database has been modified by many people, database design documents can not support the current table structure. Just want to make a data dictionary, MySQL in the INFORMATION_SCHEM

Use Python to manipulate MySQL database (data query results return dictionary type)

Tags: python#!/usr/bin/env python #-*-coding:utf-8-*- import mysqldb #建立连接 conn = MySQLdb.connect (host= ' 127.0.0.1 ', user= ' root ', passwd= ' 1qaz#edc ', db= ' test_db ') cur = conn.cursor (MySQLdb.cursors.DictCursor) #建立游标时, Add "MySQLdb.cursors.DictCursor" to let the data query result return the dictionary type #对数据进行操作 sql = "SELECT * from user" #定义查询操作的sql语句 Cur.execute (SQL) #执行sql语句

PHP to generate MySQL data dictionary _php tips

The MySQL database to generate a data dictionary, directly available to view database tables, fields, make a data dictionary is very necessary, the following simply to change the configuration can be used, the style is very good. The above is the entire content of

MySQL Data dictionary code

Tags: char cells SQL set OCA while header INF imagesUsually do development, look at the MySQL table is used navicat, although it is convenient to view the individual table fields, but to see the entire database of the individual fields of the details of the table is not so convenient, so I found a piece of code on the Internet, the database all the table fields are displayed, This will make the view structure clearer. Show effect 1PHP2 /** 3 * Genera

PHP MySQL Data dictionary

Label: PHP$dbserver= "localhost"; $dbusername= "Root"; $dbpassword= "Root"; $title= ' Data dictionary '; if(!isset($_get[' DB '])){ $database= "MyDB"; }Else{ $database=$_get[' DB ']; } $mysql _conn= @mysql_connect("{$dbserver}","{$dbusername}","{$dbpassword} ") or die("Mysql Connect is error.")); m

PostgreSQL, Oracle, and MySQL get the table structure through data dictionary

PostgreSQL, Oracle, and MySQL use data dictionaries to obtain the table structure. The schema name and table name are required. PostgreSQL:Select a. attname, pg_catalog.format_type (A. atttypid, A. atttypmod) as data_typeFrom pg_catalog.pg_attribute,(Select C. OIDFrom pg_catalog.pg_class CLeft join pg_catalog.pg_namespace nOn n. OID = C. relnamespaceWhere (C. relname) = lower ('cxf ')And (N. nspname) = lowe

PHP generates MySQL data dictionary word

PHP generates MySQL data dictionary word

Oracle Management Data Dictionary (i) Oracle Common data Dictionary

1, the function of the data dictionary The data dictionary records the system Information of the data, which is a collection of read-only tables and views. The owner of the data dictionary

Python data types-tuples, commonly used dictionary operations, python data type dictionary

Python data types-tuples, commonly used dictionary operations, python data type dictionaryTuples The Python tuples are similar to the list. The difference is thatThe elements of the tuples cannot be modified.. The tuples use parentheses, And the list uses square brackets. Creating tuples is simple. You only need to add elements in brackets and separate them with

Redis data structure (2) dictionary, redis Data Structure dictionary

Redis data structure (2) dictionary, redis Data Structure dictionary The Redis dictionary is actually a Hash table. Its implementation is similar to the hashmap structure in JAVA. Key-Value pairs are stored in Key-Value mode, but there are some differences.The hashmap struc

Oracle local management comparison data dictionary management tablespace, oracle dictionary

Oracle local management comparison data dictionary management tablespace, oracle dictionary Locally vs. Dictionary Managed Tablespaces Organized from: http://www.orafaq.com/node/3. When Oracleallocates space to a segment (like a table or index), a group of contiguousfree blocks, called an extent, is added to the segme

Oracle Management Data Dictionary (ii) application of Oracle data dictionary

1. Object definition When the Create command is executed to create an object, Oracle stores the object definition in the data dictionary. 03:31:40 sql> Select Dbms_metadata.get_ddl (' TABLE ', ' DEPT ') DDL from DUAL; Ddl -------------------------------------------------------------------------------- CREATE TABLE "SCOTT". " DEPT " ("DEPTNO" number (2,0), "Dname" VARCHAR2 (14 2, viewing the space oc

7-python3 from beginner to combat-basic data type (dictionary-dictionary)

Python from the start to the actual combat series--the definition of a directory dictionary A dictionary is another variable container model, and can store any type of object, with key-value (Key-value) storage, with extremely fast lookup speed;Each key value of the dictionary (key=>value) pairs with a colon (:) split, each pair is separated by a comma (

Thread-Safe Data Dictionary Dictionary

Using System; Using System.Collections; Using System.Collections.Generic; Using System.Diagnostics; Using System.Reflection; Using System.Runtime; Using System.Runtime.InteropServices; Using System.Runtime.Serialization; Using System.Security; Using System.Threading; Namespace Dictionary { Thread-Safe Data dictionary public class Synchronizeddictionary{ Priva

PL/SQL-related data dictionary and plsql-related dictionary

PL/SQL-related data dictionary and plsql-related dictionary Data Dictionary related to PL/SQLHttp://www.oracle.com/technetwork/issue-archive/2012/12-nov/o62plsql-1851968.html Sometimes, we encounter the following problems during PL/SQL development:1) What database objects d

"Collections" Data structures and algorithms _ container-type value dictionary & Order Dictionary

True Second, collections. Ordereddict: Dictionary with OrderOrdereddict internally maintains a doubly linked list to record the order in which key values are inserted, update the key value does not affect the original order, insert key value is inserted at the end, so its memory consumption is twice times the normal dictionary ,From collections Import ORDEREDDICTD = Ordereddict () d[' a '] =

BPM instance sharing: Playing the data dictionary new skills-Dictionary library sort

have children's shoes to ask about the sorting problem of dictionary library , Here's a quick introduction to a new skill . Data Dictionary Usage scenario: the type of leave in the absence process, sick leave, leave, take some and so on. definitionData Dictionary, and used in the processsheetdropdownlistorsheetradiobut

InnoDB Data Dictionary--Dictionary table loading

1. Introduction 在InnoDB启动时,如果是新建数据库则需初始化库,需要创建字典管理的相关信息。函数innobase_start_or_create_for_mysql调用dict_create完成此功能。即创建数据字典,因为InnoDB系统表的个数结构固定,所以初始化库的时候只需要创建这几个表的B+树即可并将B+树的根页号存放到固定位置。对于B+树,只要找到根页面,就可以从根页面开始检索数据。相关系统表(即上一节讲到的4个系统表)在InnoDB内部,不会暴露给用户。 4个系统表通过固定的硬编码进行构建。具体原理流程如下。2. Data dictionary creation and loading principle flow3. Description1) The Innobase_start_or_create_for_mysql function calls the Dic

Data dictionary table for Oracle users, roles, and permissions (System and object permissions), and oracle dictionary

Data dictionary table for Oracle users, roles, and permissions (System and object permissions), and oracle dictionary 1. Three dictionary tables 1.1 users Select * from dba_users; Select * from all_users; Select * from user_users; 1.2 roles Select * from dba_roles; 1.3 Permissions System permissions and object permissi

MySQL source code Learning & mdash; MDL dictionary lock _ MySQL

MySQL source code learning: amp; mdash; MDL dictionary lock bitsCN.com What is MDL? MDL, Meta Data lock, metadata lock, usually calledDictionary lock. The dictionary lock corresponds to the data lock. The dictionary lock is

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