Python Learning Notes _02: Using Tkinter to Connect MySQL Database to Realize Login Registration Function

1 Environmental Construction 1.1 Python installation 1.2 MySQL Environment Construction 1.3 Install MySQLdb 2. Realization 2.1 Landing Interface 2.2 Registration Interface 2.3 Specific implementation of part of the code   1 Environmental Construction 1.1 Python installation This paper implements part of Python environment: Python 2.7.1 ...

Added by sasi on Sun, 19 May 2019 06:33:34 +0300

Talk about laravel query builder using subqueries

Summary: Complex SQL with subqueries is often used in projects, and Laravel's query constructor does not directly provide a method to convert it into subqueries, or even though it does, the examples given are not very specific and are not very friendly to beginners. This article mainly talks about how Laravel constru ...

Added by vipes on Sun, 19 May 2019 02:06:00 +0300

Installing MySQL under CentOS 7

Installing MySQL under CentOS 7 Step 1: Download MySQL [root@tencent-centos1 opt]# wget http://mirrors.sohu.com/mysql/MySQL-5.7/mysql-5.7.17-linux-glibc2.5-x86_64.tar.gz Step 2: Unzip and download to MySQL package 1. Decompression package. Command template The directory where the tar-zxvf compression package i ...

Added by meir4u on Sat, 18 May 2019 22:40:15 +0300

python pymssql usage - Guide to the use of pymssql modules

pymssql module usage guide Preface Using pymssql module Basic usage process Create connection User Authentication Logon Windows Identity Authentication Logon Several other common options Interactive operation Submit sql commands Calling stored procedures Submit revision Get results Notes for Cursor Objects Close links F ...

Added by sandstorm140 on Sat, 18 May 2019 09:34:38 +0300

Student information management system (data transmission between js and php)

The end of the latest period is approaching, busier, slower, forgive me. After setting up the environment and confirming the connection, we can start writing programs. Then build tables. insert data (Here's just one example) Also note when creating a table, because you want to create a view, you should build an ...

Added by Crow on Sat, 18 May 2019 05:36:08 +0300

PHP & MySQL "Data Association One-to-One" Best Practice

Preface In the process of development, we usually encounter many one-to-one data processing situations. Most of the time we will get a list, and then a single record of the list corresponds to another table to achieve business. For example, the following two tables of commodity information and commodity details, here in order to demonstrate the ...

Added by Vizzini on Sat, 18 May 2019 01:31:07 +0300

Introduction to PostgreSQL Full-Text Retrieval

PostgreSQL comes with a simple full-text retrieval engine that enables full-text retrieval of small amounts of data.In this article, we will guide you through this feature, which is sufficient for small-volume searches without the need to build additional heavy-weight full-text retrieval servers such as ES. For detailed full-text ...

Added by pumaf1 on Fri, 17 May 2019 00:39:42 +0300

CryptDB Code Analysis 4-Encrypted Metadata Reading and Writing

Previously, we introduced the classes related to metadata management in CryptDB and the storage format of these classes in MySQL. This article describes when these metadata were created, when and how they were written to the database, when they were read, and where they were used. Initialization and Metadata Readin ...

Added by reidme on Thu, 16 May 2019 22:45:15 +0300

Oracle day03 Joint Table Query

Why query for table joins? Query employee information with department name SALES How do I join queries to tables? Two ways: Sql 1992 and sql1999 sql1992sql classificationCartesian product (table multiplier)2. Use'='for the join condition of the equivalence join table3. Join conditions for non-equal join tables use'>, >=, <, <=,! ...

Added by chauffeur on Thu, 16 May 2019 08:02:13 +0300

Java project generates oracle database dump file

Oracle database client has an sqlplus component that allows us to perform some database operations on the command line. In order to improve the efficiency of dump file writing, we try to use sqlplus command to generate dump file. sqlplus can specify running scripts, such as: sqlplus admin/pwd@//127.0.0.1:1526/orcl@./tmp_sql/N ...

Added by jonasr on Thu, 16 May 2019 06:48:26 +0300