Programmer Think

1. Environmental preparation Main librarySpare databaseoperating systemLinuxLinuxServer nameprimarynodestandbynodeIP address planning192.168.186.130192.168.186.131------------------------------------------------------Database version11.2.0.411.2.0.4db_namesfxtsfxtdb_unique_namesfxt_bfsfxt_bfinstance_namesfxtsfxt_bfservice_namesfxtsfxtDatabase ...

Job requirements: 1. Browse electronic courseware and notes. (Browse without submitting) 2. Complete textbook examples 2.6, 2.8, 2.10, 2.11, 2.13. 3. Complete the textbook P280 experiment 1, experiment 2. 4. Complete the contents of the following experiment topics. 5. Complete the third exercise on page P23 of the textbook and convert it into a ...

First, give the Activity table used by the four questions: +--------------+---------+ | Column Name | Type | +--------------+---------+ | player_id | int | | device_id | int | | event_date | date | | games_played | int | +--------------+---------+ The primary key of the table is (player_id, event_date). This table s ...

Decentralized open source social platform – misskey I can't bear to see the leaders deploy mammoths. In fact, I also want to have my own district centered social platform... hmmm, but mammoths eat too much memory. Is there a better source program? So I found this high color value and low occupancy program misskey on github ##Program int ...

1. Business background requirements At present, the company where the landlord is located uses the same set of database with the advance environment. The purpose of this is to check the real situation on the acceptance line of the advance environment. However, several configuration tables need to be changed separately in the advance environmen ...

SQL processing In practical application, we need not only simple single table query, but also simultaneous query information of other tables by using MyBatis. To solve this problem, a more advanced result mapping is required. preparation in advance SQL preparation We need a student table and a teacher table. The teacher's primary key is id ...

Article introduction Project A jumps to project B. when project A logs in as, it also needs to enter the account of project B when logging in to project B. the user experience is not good. Therefore, the two items need to be bound. After logging in to item A, you can log in directly when jumping to item b. This project is to maintain other peo ...

  catalogue Background introduction Functional comparison Introduction to common classes of database operation in QT Usage example Data preparation Create entity class Create database access class Personal summary About how to get errors in database execution and judge whether SQL statement execution is successful About parameterized ...

mysql transaction In MySQL, transaction is actually the smallest and indivisible unit of work. Transactions can ensure the integrity of a business. Such as bank transfer a-> -100 update user set money = money-100 where name'a'; b-> +100 updata user set money=money +100 where name='b'; In the actual program. If only one ...

[Oracle] CentOS 7.4 installation and deployment Oracle19c Project requirements         In the production environment, according to the business development and project requirements of the enterprise, the business database will be selected according to the importance of the business, and the data model and database design ...